NEWS
author nipkow
Fri Sep 23 00:10:58 2005 +0200 (2005-09-23)
changeset 17590 56dc95e8b5c5
parent 17584 6eab0f1cb0fe
child 17595 3e3a30bf702f
permissions -rw-r--r--
*** empty log message ***
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Isabelle NEWS -- history user-relevant changes
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==============================================
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New in Isabelle2005 (September 2005)
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------------------------------------
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*** General ***
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* Theory headers: the new header syntax for Isar theories is
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  theory <name>
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  imports <theory1> ... <theoryN>
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  uses <file1> ... <fileM>
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  begin
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where the 'uses' part is optional.  The previous syntax
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  theory <name> = <theory1> + ... + <theoryN>:
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will disappear in the next release.  Use isatool fixheaders to convert
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existing theory files.  Note that there is no change in ancient
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non-Isar theories now, but these will disappear soon.
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* Theory loader: parent theories can now also be referred to via
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relative and absolute paths.
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* Command 'find_theorems' searches for a list of criteria instead of a
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list of constants. Known criteria are: intro, elim, dest, name:string,
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simp:term, and any term. Criteria can be preceded by '-' to select
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theorems that do not match. Intro, elim, dest select theorems that
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match the current goal, name:s selects theorems whose fully qualified
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name contain s, and simp:term selects all simplification rules whose
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lhs match term.  Any other term is interpreted as pattern and selects
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all theorems matching the pattern. Available in ProofGeneral under
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'ProofGeneral -> Find Theorems' or C-c C-f.  Example:
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  C-c C-f (100) "(_::nat) + _ + _" intro -name: "HOL."
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prints the last 100 theorems matching the pattern "(_::nat) + _ + _",
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matching the current goal as introduction rule and not having "HOL."
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in their name (i.e. not being defined in theory HOL).
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* Command 'thms_containing' has been discontinued in favour of
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'find_theorems'; INCOMPATIBILITY.
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* Communication with Proof General is now 8bit clean, which means that
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Unicode text in UTF-8 encoding may be used within theory texts (both
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formal and informal parts).  Cf. option -U of the Isabelle Proof
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General interface.  Here are some simple examples (cf. src/HOL/ex):
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  http://isabelle.in.tum.de/library/HOL/ex/Hebrew.html
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  http://isabelle.in.tum.de/library/HOL/ex/Chinese.html
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* Improved efficiency of the Simplifier and, to a lesser degree, the
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Classical Reasoner.  Typical big applications run around 2 times
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faster.
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* ProofGeneral interface: the default settings no longer prefer xemacs
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over GNU emacs.  Users typically need to experiment with various
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variations on PROOFGENERAL_OPTIONS="... -p emacs" to find the most
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stable Emacs version on their platform.
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*** Document preparation ***
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* Commands 'display_drafts' and 'print_drafts' perform simple output
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of raw sources.  Only those symbols that do not require additional
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LaTeX packages (depending on comments in isabellesym.sty) are
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displayed properly, everything else is left verbatim.  isatool display
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and isatool print are used as front ends (these are subject to the
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DVI/PDF_VIEWER and PRINT_COMMAND settings, respectively).
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* Command tags control specific markup of certain regions of text,
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notably folding and hiding.  Predefined tags include "theory" (for
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theory begin and end), "proof" for proof commands, and "ML" for
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commands involving ML code; the additional tags "visible" and
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"invisible" are unused by default.  Users may give explicit tag
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specifications in the text, e.g. ''by %invisible (auto)''.  The
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interpretation of tags is determined by the LaTeX job during document
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preparation: see option -V of isatool usedir, or options -n and -t of
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isatool document, or even the LaTeX macros \isakeeptag, \isafoldtag,
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\isadroptag.
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Several document versions may be produced at the same time via isatool
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usedir (the generated index.html will link all of them).  Typical
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specifications include ''-V document=theory,proof,ML'' to present
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theory/proof/ML parts faithfully, ''-V outline=/proof,/ML'' to fold
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proof and ML commands, and ''-V mutilated=-theory,-proof,-ML'' to omit
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these parts without any formal replacement text.  The Isabelle site
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default settings produce ''document'' and ''outline'' versions as
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specified above.
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* Several new antiquotations:
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  @{term_type term} prints a term with its type annotated;
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  @{typeof term} prints the type of a term;
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  @{const const} is the same as @{term const}, but checks that the
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  argument is a known logical constant;
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  @{term_style style term} and @{thm_style style thm} print a term or
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  theorem applying a "style" to it
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  @{ML text}
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Predefined styles are 'lhs' and 'rhs' printing the lhs/rhs of
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definitions, equations, inequations etc., 'concl' printing only the
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conclusion of a meta-logical statement theorem, and 'prem1' .. 'prem19'
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to print the specified premise.  TermStyle.add_style provides an ML
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interface for introducing further styles.  See also the "LaTeX Sugar"
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document practical applications.  The ML antiquotation prints
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type-checked ML expressions verbatim.
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* Markup commands 'chapter', 'section', 'subsection', 'subsubsection',
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and 'text' support optional locale specification '(in loc)', which
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specifies the default context for interpreting antiquotations.  For
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example: 'text (in lattice) {* @{thm inf_assoc}*}'.
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* Option 'locale=NAME' of antiquotations specifies an alternative
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context interpreting the subsequent argument.  For example: @{thm
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[locale=lattice] inf_assoc}.
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* Proper output of proof terms (@{prf ...} and @{full_prf ...}) within
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a proof context.
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* Proper output of antiquotations for theory commands involving a
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proof context (such as 'locale' or 'theorem (in loc) ...').
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* Delimiters of outer tokens (string etc.) now produce separate LaTeX
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macros (\isachardoublequoteopen, isachardoublequoteclose etc.).
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* isatool usedir: new option -C (default true) controls whether option
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-D should include a copy of the original document directory; -C false
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prevents unwanted effects such as copying of administrative CVS data.
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*** Pure ***
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* Considerably improved version of 'constdefs' command.  Now performs
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automatic type-inference of declared constants; additional support for
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local structure declarations (cf. locales and HOL records), see also
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isar-ref manual.  Potential INCOMPATIBILITY: need to observe strictly
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sequential dependencies of definitions within a single 'constdefs'
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section; moreover, the declared name needs to be an identifier.  If
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all fails, consider to fall back on 'consts' and 'defs' separately.
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* Improved indexed syntax and implicit structures.  First of all,
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indexed syntax provides a notational device for subscripted
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application, using the new syntax \<^bsub>term\<^esub> for arbitrary
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expressions.  Secondly, in a local context with structure
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declarations, number indexes \<^sub>n or the empty index (default
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number 1) refer to a certain fixed variable implicitly; option
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show_structs controls printing of implicit structures.  Typical
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applications of these concepts involve record types and locales.
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* New command 'no_syntax' removes grammar declarations (and
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translations) resulting from the given syntax specification, which is
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interpreted in the same manner as for the 'syntax' command.
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* 'Advanced' translation functions (parse_translation etc.) may depend
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on the signature of the theory context being presently used for
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parsing/printing, see also isar-ref manual.
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* Improved 'oracle' command provides a type-safe interface to turn an
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ML expression of type theory -> T -> term into a primitive rule of
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type theory -> T -> thm (i.e. the functionality of Thm.invoke_oracle
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is already included here); see also FOL/ex/IffExample.thy;
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INCOMPATIBILITY.
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* axclass: name space prefix for class "c" is now "c_class" (was "c"
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before); "cI" is no longer bound, use "c.intro" instead.
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INCOMPATIBILITY.  This change avoids clashes of fact bindings for
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axclasses vs. locales.
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* Improved internal renaming of symbolic identifiers -- attach primes
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instead of base 26 numbers.
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* New flag show_question_marks controls printing of leading question
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marks in schematic variable names.
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* In schematic variable names, *any* symbol following \<^isub> or
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\<^isup> is now treated as part of the base name.  For example, the
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following works without printing of awkward ".0" indexes:
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  lemma "x\<^isub>1 = x\<^isub>2 ==> x\<^isub>2 = x\<^isub>1"
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    by simp
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* Inner syntax includes (*(*nested*) comments*).
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* Pretty printer now supports unbreakable blocks, specified in mixfix
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annotations as "(00...)".
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* Clear separation of logical types and nonterminals, where the latter
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may only occur in 'syntax' specifications or type abbreviations.
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Before that distinction was only partially implemented via type class
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"logic" vs. "{}".  Potential INCOMPATIBILITY in rare cases of improper
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use of 'types'/'consts' instead of 'nonterminals'/'syntax'.  Some very
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exotic syntax specifications may require further adaption
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(e.g. Cube/Base.thy).
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* Removed obsolete type class "logic", use the top sort {} instead.
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Note that non-logical types should be declared as 'nonterminals'
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rather than 'types'.  INCOMPATIBILITY for new object-logic
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specifications.
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* 'defs': more well-formedness checks of overloaded definitions.
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* Attributes 'induct' and 'cases': type or set names may now be
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locally fixed variables as well.
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* Simplifier: can now control the depth to which conditional rewriting
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is traced via the PG menu Isabelle -> Settings -> Trace Simp Depth
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Limit.
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* Simplifier: simplification procedures may now take the current
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simpset into account (cf. Simplifier.simproc(_i) / mk_simproc
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interface), which is very useful for calling the Simplifier
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recursively.  Minor INCOMPATIBILITY: the 'prems' argument of simprocs
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is gone -- use prems_of_ss on the simpset instead.  Moreover, the
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low-level mk_simproc no longer applies Logic.varify internally, to
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allow for use in a context of fixed variables.
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* thin_tac now works even if the assumption being deleted contains !!
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or ==>.  More generally, erule now works even if the major premise of
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the elimination rule contains !! or ==>.
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* Method "rules" has been renamed to "iprover"
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* Reorganized bootstrapping of the Pure theories; CPure is now derived
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from Pure, which contains all common declarations already.  Both
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theories are defined via plain Isabelle/Isar .thy files.
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INCOMPATIBILITY: elements of CPure (such as the CPure.intro /
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CPure.elim / CPure.dest attributes) now appear in the Pure name space;
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use isatool fixcpure to adapt your theory and ML sources.
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* New syntax 'name(i-j, i-, i, ...)' for referring to specific
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selections of theorems in named facts via index ranges.
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* 'print_theorems': in theory mode, really print the difference
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wrt. the last state (works for interactive theory development only),
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in proof mode print all local facts (cf. 'print_facts');
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* 'hide': option '(open)' hides only base names.
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* More efficient treatment of intermediate checkpoints in interactive
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theory development.
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*** Locales ***
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* New commands for the interpretation of locale expressions in
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theories (1), locales (2) and proof contexts (3).  These generate
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proof obligations from the expression specification.  After the
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obligations have been discharged, theorems of the expression are added
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to the theory, target locale or proof context.  The synopsis of the
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commands is a follows:
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  (1) interpretation expr inst
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  (2) interpretation target < expr
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  (3) interpret expr inst
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Interpretation in theories and proof contexts require a parameter
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instantiation of terms from the current context.  This is applied to
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specifications and theorems of the interpreted expression.
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Interpretation in locales only permits parameter renaming through the
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locale expression.  Interpretation is smart in that interpretations
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that are active already do not occur in proof obligations, neither are
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instantiated theorems stored in duplicate.  Use 'print_interps' to
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inspect active interpretations of a particular locale.  For details,
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see the Isar Reference manual.  Examples can be found in
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HOL/Finite_Set.thy and HOL/Algebra/UnivPoly.thy.
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INCOMPATIBILITY: former 'instantiate' has been withdrawn, use
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'interpret' instead.
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* New context element 'constrains' for adding type constraints to
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parameters.
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* Context expressions: renaming of parameters with syntax
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redeclaration.
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* Locale declaration: 'includes' disallowed.
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* Proper static binding of attribute syntax -- i.e. types / terms /
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facts mentioned as arguments are always those of the locale definition
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context, independently of the context of later invocations.  Moreover,
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locale operations (renaming and type / term instantiation) are applied
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to attribute arguments as expected.
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INCOMPATIBILITY of the ML interface: always pass Attrib.src instead of
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actual attributes; rare situations may require Attrib.attribute to
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embed those attributes into Attrib.src that lack concrete syntax.
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Attribute implementations need to cooperate properly with the static
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binding mechanism.  Basic parsers Args.XXX_typ/term/prop and
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Attrib.XXX_thm etc. already do the right thing without further
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intervention.  Only unusual applications -- such as "where" or "of"
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(cf. src/Pure/Isar/attrib.ML), which process arguments depending both
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on the context and the facts involved -- may have to assign parsed
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values to argument tokens explicitly.
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* Changed parameter management in theorem generation for long goal
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statements with 'includes'.  INCOMPATIBILITY: produces a different
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theorem statement in rare situations.
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* Locale inspection command 'print_locale' omits notes elements.  Use
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'print_locale!' to have them included in the output.
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*** Provers ***
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* Provers/hypsubst.ML: improved version of the subst method, for
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single-step rewriting: it now works in bound variable contexts. New is
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'subst (asm)', for rewriting an assumption.  INCOMPATIBILITY: may
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rewrite a different subterm than the original subst method, which is
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still available as 'simplesubst'.
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* Provers/quasi.ML: new transitivity reasoners for transitivity only
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and quasi orders.
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* Provers/trancl.ML: new transitivity reasoner for transitive and
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reflexive-transitive closure of relations.
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* Provers/blast.ML: new reference depth_limit to make blast's depth
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limit (previously hard-coded with a value of 20) user-definable.
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* Provers/simplifier.ML has been moved to Pure, where Simplifier.setup
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is peformed already.  Object-logics merely need to finish their
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initial simpset configuration as before.  INCOMPATIBILITY.
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*** HOL ***
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* Symbolic syntax of Hilbert Choice Operator is now as follows:
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  syntax (epsilon)
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    "_Eps" :: "[pttrn, bool] => 'a"    ("(3\<some>_./ _)" [0, 10] 10)
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The symbol \<some> is displayed as the alternative epsilon of LaTeX
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and x-symbol; use option '-m epsilon' to get it actually printed.
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Moreover, the mathematically important symbolic identifier \<epsilon>
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becomes available as variable, constant etc.  INCOMPATIBILITY,
wenzelm@16234
   343
wenzelm@16234
   344
* "x > y" abbreviates "y < x" and "x >= y" abbreviates "y <= x".
wenzelm@16234
   345
Similarly for all quantifiers: "ALL x > y" etc.  The x-symbol for >=
wenzelm@17371
   346
is \<ge>. New transitivity rules have been added to HOL/Orderings.thy to
avigad@17016
   347
support corresponding Isar calculations.
wenzelm@16234
   348
wenzelm@16234
   349
* "{x:A. P}" abbreviates "{x. x:A & P}", and similarly for "\<in>"
wenzelm@16234
   350
instead of ":".
wenzelm@16234
   351
wenzelm@16234
   352
* theory SetInterval: changed the syntax for open intervals:
wenzelm@16234
   353
wenzelm@16234
   354
  Old       New
wenzelm@16234
   355
  {..n(}    {..<n}
wenzelm@16234
   356
  {)n..}    {n<..}
wenzelm@16234
   357
  {m..n(}   {m..<n}
wenzelm@16234
   358
  {)m..n}   {m<..n}
wenzelm@16234
   359
  {)m..n(}  {m<..<n}
wenzelm@16234
   360
wenzelm@16234
   361
The old syntax is still supported but will disappear in the next
wenzelm@16234
   362
release.  For conversion use the following Emacs search and replace
wenzelm@16234
   363
patterns (these are not perfect but work quite well):
nipkow@15046
   364
nipkow@15046
   365
  {)\([^\.]*\)\.\.  ->  {\1<\.\.}
nipkow@15046
   366
  \.\.\([^(}]*\)(}  ->  \.\.<\1}
nipkow@15046
   367
wenzelm@17533
   368
* Theory Commutative_Ring (in Library): method comm_ring for proving
wenzelm@17533
   369
equalities in commutative rings; method 'algebra' provides a generic
wenzelm@17533
   370
interface.
wenzelm@17389
   371
wenzelm@17389
   372
* Theory Finite_Set: changed the syntax for 'setsum', summation over
wenzelm@16234
   373
finite sets: "setsum (%x. e) A", which used to be "\<Sum>x:A. e", is
wenzelm@17371
   374
now either "SUM x:A. e" or "\<Sum>x \<in> A. e". The bound variable can
paulson@17189
   375
be a tuple pattern.
wenzelm@16234
   376
wenzelm@16234
   377
Some new syntax forms are available:
wenzelm@16234
   378
wenzelm@16234
   379
  "\<Sum>x | P. e"      for     "setsum (%x. e) {x. P}"
wenzelm@16234
   380
  "\<Sum>x = a..b. e"   for     "setsum (%x. e) {a..b}"
wenzelm@16234
   381
  "\<Sum>x = a..<b. e"  for     "setsum (%x. e) {a..<b}"
wenzelm@16234
   382
  "\<Sum>x < k. e"      for     "setsum (%x. e) {..<k}"
wenzelm@16234
   383
wenzelm@16234
   384
The latter form "\<Sum>x < k. e" used to be based on a separate
wenzelm@16234
   385
function "Summation", which has been discontinued.
wenzelm@16234
   386
wenzelm@16234
   387
* theory Finite_Set: in structured induction proofs, the insert case
wenzelm@16234
   388
is now 'case (insert x F)' instead of the old counterintuitive 'case
wenzelm@16234
   389
(insert F x)'.
wenzelm@16234
   390
wenzelm@16234
   391
* The 'refute' command has been extended to support a much larger
wenzelm@16234
   392
fragment of HOL, including axiomatic type classes, constdefs and
wenzelm@16234
   393
typedefs, inductive datatypes and recursion.
wenzelm@16234
   394
wenzelm@16234
   395
* Datatype induction via method 'induct' now preserves the name of the
wenzelm@16234
   396
induction variable. For example, when proving P(xs::'a list) by
wenzelm@16234
   397
induction on xs, the induction step is now P(xs) ==> P(a#xs) rather
wenzelm@16234
   398
than P(list) ==> P(a#list) as previously.  Potential INCOMPATIBILITY
wenzelm@16234
   399
in unstructured proof scripts.
wenzelm@16234
   400
wenzelm@16234
   401
* Reworked implementation of records.  Improved scalability for
wenzelm@16234
   402
records with many fields, avoiding performance problems for type
wenzelm@16234
   403
inference. Records are no longer composed of nested field types, but
wenzelm@16234
   404
of nested extension types. Therefore the record type only grows linear
wenzelm@16234
   405
in the number of extensions and not in the number of fields.  The
wenzelm@16234
   406
top-level (users) view on records is preserved.  Potential
wenzelm@16234
   407
INCOMPATIBILITY only in strange cases, where the theory depends on the
wenzelm@16234
   408
old record representation. The type generated for a record is called
wenzelm@16234
   409
<record_name>_ext_type.
wenzelm@16234
   410
wenzelm@16234
   411
Flag record_quick_and_dirty_sensitive can be enabled to skip the
wenzelm@16234
   412
proofs triggered by a record definition or a simproc (if
wenzelm@16234
   413
quick_and_dirty is enabled).  Definitions of large records can take
wenzelm@16234
   414
quite long.
wenzelm@16234
   415
wenzelm@16234
   416
New simproc record_upd_simproc for simplification of multiple record
wenzelm@16234
   417
updates enabled by default.  Moreover, trivial updates are also
wenzelm@16234
   418
removed: r(|x := x r|) = r.  INCOMPATIBILITY: old proofs break
wenzelm@16234
   419
occasionally, since simplification is more powerful by default.
wenzelm@16234
   420
wenzelm@17275
   421
* typedef: proper support for polymorphic sets, which contain extra
wenzelm@17275
   422
type-variables in the term.
wenzelm@17275
   423
wenzelm@16234
   424
* Simplifier: automatically reasons about transitivity chains
wenzelm@16234
   425
involving "trancl" (r^+) and "rtrancl" (r^*) by setting up tactics
wenzelm@16234
   426
provided by Provers/trancl.ML as additional solvers.  INCOMPATIBILITY:
wenzelm@16234
   427
old proofs break occasionally as simplification may now solve more
wenzelm@16234
   428
goals than previously.
wenzelm@16234
   429
wenzelm@16234
   430
* Simplifier: converts x <= y into x = y if assumption y <= x is
wenzelm@16234
   431
present.  Works for all partial orders (class "order"), in particular
wenzelm@16234
   432
numbers and sets.  For linear orders (e.g. numbers) it treats ~ x < y
wenzelm@16234
   433
just like y <= x.
wenzelm@16234
   434
wenzelm@16234
   435
* Simplifier: new simproc for "let x = a in f x".  If a is a free or
wenzelm@16234
   436
bound variable or a constant then the let is unfolded.  Otherwise
wenzelm@16234
   437
first a is simplified to b, and then f b is simplified to g. If
wenzelm@16234
   438
possible we abstract b from g arriving at "let x = b in h x",
wenzelm@16234
   439
otherwise we unfold the let and arrive at g.  The simproc can be
wenzelm@16234
   440
enabled/disabled by the reference use_let_simproc.  Potential
wenzelm@16234
   441
INCOMPATIBILITY since simplification is more powerful by default.
webertj@15776
   442
paulson@16563
   443
* Classical reasoning: the meson method now accepts theorems as arguments.
paulson@16563
   444
wenzelm@16891
   445
* Theory OrderedGroup and Ring_and_Field: various additions and
wenzelm@16891
   446
improvements to faciliate calculations involving equalities and
wenzelm@16891
   447
inequalities.
wenzelm@16891
   448
wenzelm@16891
   449
The following theorems have been eliminated or modified
wenzelm@16891
   450
(INCOMPATIBILITY):
avigad@16888
   451
avigad@16888
   452
  abs_eq             now named abs_of_nonneg
wenzelm@17371
   453
  abs_of_ge_0        now named abs_of_nonneg
wenzelm@17371
   454
  abs_minus_eq       now named abs_of_nonpos
avigad@16888
   455
  imp_abs_id         now named abs_of_nonneg
avigad@16888
   456
  imp_abs_neg_id     now named abs_of_nonpos
avigad@16888
   457
  mult_pos           now named mult_pos_pos
avigad@16888
   458
  mult_pos_le        now named mult_nonneg_nonneg
avigad@16888
   459
  mult_pos_neg_le    now named mult_nonneg_nonpos
avigad@16888
   460
  mult_pos_neg2_le   now named mult_nonneg_nonpos2
avigad@16888
   461
  mult_neg           now named mult_neg_neg
avigad@16888
   462
  mult_neg_le        now named mult_nonpos_nonpos
avigad@16888
   463
wenzelm@16891
   464
* Theory Parity: added rules for simplifying exponents.
wenzelm@16891
   465
nipkow@17092
   466
* Theory List:
nipkow@17092
   467
nipkow@17092
   468
The following theorems have been eliminated or modified
nipkow@17092
   469
(INCOMPATIBILITY):
nipkow@17092
   470
nipkow@17092
   471
  list_all_Nil       now named list_all.simps(1)
nipkow@17092
   472
  list_all_Cons      now named list_all.simps(2)
nipkow@17092
   473
  list_all_conv      now named list_all_iff
nipkow@17092
   474
  set_mem_eq         now named mem_iff
nipkow@17092
   475
wenzelm@16929
   476
* Theories SetsAndFunctions and BigO (see HOL/Library) support
wenzelm@16929
   477
asymptotic "big O" calculations.  See the notes in BigO.thy.
wenzelm@16929
   478
avigad@16888
   479
avigad@16888
   480
*** HOL-Complex ***
avigad@16888
   481
wenzelm@16891
   482
* Theory RealDef: better support for embedding natural numbers and
wenzelm@16891
   483
integers in the reals.
wenzelm@16891
   484
wenzelm@16891
   485
The following theorems have been eliminated or modified
wenzelm@16891
   486
(INCOMPATIBILITY):
wenzelm@16891
   487
avigad@17016
   488
  exp_ge_add_one_self  now requires no hypotheses
avigad@17016
   489
  real_of_int_add      reversed direction of equality (use [symmetric])
avigad@17016
   490
  real_of_int_minus    reversed direction of equality (use [symmetric])
avigad@17016
   491
  real_of_int_diff     reversed direction of equality (use [symmetric])
avigad@17016
   492
  real_of_int_mult     reversed direction of equality (use [symmetric])
wenzelm@16891
   493
wenzelm@16891
   494
* Theory RComplete: expanded support for floor and ceiling functions.
avigad@16888
   495
avigad@16962
   496
* Theory Ln is new, with properties of the natural logarithm
avigad@16962
   497
wenzelm@17423
   498
* Hyperreal: There is a new type constructor "star" for making
wenzelm@17423
   499
nonstandard types.  The old type names are now type synonyms:
wenzelm@17423
   500
wenzelm@17423
   501
  hypreal = real star
wenzelm@17423
   502
  hypnat = nat star
wenzelm@17423
   503
  hcomplex = complex star
wenzelm@17423
   504
wenzelm@17423
   505
* Hyperreal: Many groups of similarly-defined constants have been
huffman@17442
   506
replaced by polymorphic versions (INCOMPATIBILITY):
wenzelm@17423
   507
wenzelm@17423
   508
  star_of <-- hypreal_of_real, hypnat_of_nat, hcomplex_of_complex
wenzelm@17423
   509
wenzelm@17423
   510
  starset      <-- starsetNat, starsetC
wenzelm@17423
   511
  *s*          <-- *sNat*, *sc*
wenzelm@17423
   512
  starset_n    <-- starsetNat_n, starsetC_n
wenzelm@17423
   513
  *sn*         <-- *sNatn*, *scn*
wenzelm@17423
   514
  InternalSets <-- InternalNatSets, InternalCSets
wenzelm@17423
   515
huffman@17442
   516
  starfun      <-- starfun{Nat,Nat2,C,RC,CR}
wenzelm@17423
   517
  *f*          <-- *fNat*, *fNat2*, *fc*, *fRc*, *fcR*
huffman@17442
   518
  starfun_n    <-- starfun{Nat,Nat2,C,RC,CR}_n
wenzelm@17423
   519
  *fn*         <-- *fNatn*, *fNat2n*, *fcn*, *fRcn*, *fcRn*
huffman@17442
   520
  InternalFuns <-- InternalNatFuns, InternalNatFuns2, Internal{C,RC,CR}Funs
wenzelm@17423
   521
wenzelm@17423
   522
* Hyperreal: Many type-specific theorems have been removed in favor of
huffman@17442
   523
theorems specific to various axiomatic type classes (INCOMPATIBILITY):
huffman@17442
   524
huffman@17442
   525
  add_commute <-- {hypreal,hypnat,hcomplex}_add_commute
huffman@17442
   526
  add_assoc   <-- {hypreal,hypnat,hcomplex}_add_assocs
huffman@17442
   527
  OrderedGroup.add_0 <-- {hypreal,hypnat,hcomplex}_add_zero_left
huffman@17442
   528
  OrderedGroup.add_0_right <-- {hypreal,hcomplex}_add_zero_right
wenzelm@17423
   529
  right_minus <-- hypreal_add_minus
huffman@17442
   530
  left_minus <-- {hypreal,hcomplex}_add_minus_left
huffman@17442
   531
  mult_commute <-- {hypreal,hypnat,hcomplex}_mult_commute
huffman@17442
   532
  mult_assoc <-- {hypreal,hypnat,hcomplex}_mult_assoc
huffman@17442
   533
  mult_1_left <-- {hypreal,hypnat}_mult_1, hcomplex_mult_one_left
wenzelm@17423
   534
  mult_1_right <-- hcomplex_mult_one_right
wenzelm@17423
   535
  mult_zero_left <-- hcomplex_mult_zero_left
huffman@17442
   536
  left_distrib <-- {hypreal,hypnat,hcomplex}_add_mult_distrib
wenzelm@17423
   537
  right_distrib <-- hypnat_add_mult_distrib2
huffman@17442
   538
  zero_neq_one <-- {hypreal,hypnat,hcomplex}_zero_not_eq_one
wenzelm@17423
   539
  right_inverse <-- hypreal_mult_inverse
wenzelm@17423
   540
  left_inverse <-- hypreal_mult_inverse_left, hcomplex_mult_inv_left
huffman@17442
   541
  order_refl <-- {hypreal,hypnat}_le_refl
huffman@17442
   542
  order_trans <-- {hypreal,hypnat}_le_trans
huffman@17442
   543
  order_antisym <-- {hypreal,hypnat}_le_anti_sym
huffman@17442
   544
  order_less_le <-- {hypreal,hypnat}_less_le
huffman@17442
   545
  linorder_linear <-- {hypreal,hypnat}_le_linear
huffman@17442
   546
  add_left_mono <-- {hypreal,hypnat}_add_left_mono
huffman@17442
   547
  mult_strict_left_mono <-- {hypreal,hypnat}_mult_less_mono2
wenzelm@17423
   548
  add_nonneg_nonneg <-- hypreal_le_add_order
wenzelm@17423
   549
wenzelm@17423
   550
* Hyperreal: Separate theorems having to do with type-specific
wenzelm@17423
   551
versions of constants have been merged into theorems that apply to the
huffman@17442
   552
new polymorphic constants (INCOMPATIBILITY):
huffman@17442
   553
huffman@17442
   554
  STAR_UNIV_set <-- {STAR_real,NatStar_real,STARC_complex}_set
huffman@17442
   555
  STAR_empty_set <-- {STAR,NatStar,STARC}_empty_set
huffman@17442
   556
  STAR_Un <-- {STAR,NatStar,STARC}_Un
huffman@17442
   557
  STAR_Int <-- {STAR,NatStar,STARC}_Int
huffman@17442
   558
  STAR_Compl <-- {STAR,NatStar,STARC}_Compl
huffman@17442
   559
  STAR_subset <-- {STAR,NatStar,STARC}_subset
huffman@17442
   560
  STAR_mem <-- {STAR,NatStar,STARC}_mem
huffman@17442
   561
  STAR_mem_Compl <-- {STAR,STARC}_mem_Compl
huffman@17442
   562
  STAR_diff <-- {STAR,STARC}_diff
huffman@17442
   563
  STAR_star_of_image_subset <-- {STAR_hypreal_of_real, NatStar_hypreal_of_real,
huffman@17442
   564
    STARC_hcomplex_of_complex}_image_subset
huffman@17442
   565
  starset_n_Un <-- starset{Nat,C}_n_Un
huffman@17442
   566
  starset_n_Int <-- starset{Nat,C}_n_Int
huffman@17442
   567
  starset_n_Compl <-- starset{Nat,C}_n_Compl
huffman@17442
   568
  starset_n_diff <-- starset{Nat,C}_n_diff
huffman@17442
   569
  InternalSets_Un <-- Internal{Nat,C}Sets_Un
huffman@17442
   570
  InternalSets_Int <-- Internal{Nat,C}Sets_Int
huffman@17442
   571
  InternalSets_Compl <-- Internal{Nat,C}Sets_Compl
huffman@17442
   572
  InternalSets_diff <-- Internal{Nat,C}Sets_diff
huffman@17442
   573
  InternalSets_UNIV_diff <-- Internal{Nat,C}Sets_UNIV_diff
huffman@17442
   574
  InternalSets_starset_n <-- Internal{Nat,C}Sets_starset{Nat,C}_n
huffman@17442
   575
  starset_starset_n_eq <-- starset{Nat,C}_starset{Nat,C}_n_eq
huffman@17442
   576
  starset_n_starset <-- starset{Nat,C}_n_starset{Nat,C}
huffman@17442
   577
  starfun_n_starfun <-- starfun{Nat,Nat2,C,RC,CR}_n_starfun{Nat,Nat2,C,RC,CR}
huffman@17442
   578
  starfun <-- starfun{Nat,Nat2,C,RC,CR}
huffman@17442
   579
  starfun_mult <-- starfun{Nat,Nat2,C,RC,CR}_mult
huffman@17442
   580
  starfun_add <-- starfun{Nat,Nat2,C,RC,CR}_add
huffman@17442
   581
  starfun_minus <-- starfun{Nat,Nat2,C,RC,CR}_minus
huffman@17442
   582
  starfun_diff <-- starfun{C,RC,CR}_diff
huffman@17442
   583
  starfun_o <-- starfun{NatNat2,Nat2,_stafunNat,C,C_starfunRC,_starfunCR}_o
huffman@17442
   584
  starfun_o2 <-- starfun{NatNat2,_stafunNat,C,C_starfunRC,_starfunCR}_o2
huffman@17442
   585
  starfun_const_fun <-- starfun{Nat,Nat2,C,RC,CR}_const_fun
huffman@17442
   586
  starfun_inverse <-- starfun{Nat,C,RC,CR}_inverse
huffman@17442
   587
  starfun_eq <-- starfun{Nat,Nat2,C,RC,CR}_eq
huffman@17442
   588
  starfun_eq_iff <-- starfun{C,RC,CR}_eq_iff
wenzelm@17423
   589
  starfun_Id <-- starfunC_Id
huffman@17442
   590
  starfun_approx <-- starfun{Nat,CR}_approx
huffman@17442
   591
  starfun_capprox <-- starfun{C,RC}_capprox
wenzelm@17423
   592
  starfun_abs <-- starfunNat_rabs
huffman@17442
   593
  starfun_lambda_cancel <-- starfun{C,CR,RC}_lambda_cancel
huffman@17442
   594
  starfun_lambda_cancel2 <-- starfun{C,CR,RC}_lambda_cancel2
wenzelm@17423
   595
  starfun_mult_HFinite_approx <-- starfunCR_mult_HFinite_capprox
huffman@17442
   596
  starfun_mult_CFinite_capprox <-- starfun{C,RC}_mult_CFinite_capprox
huffman@17442
   597
  starfun_add_capprox <-- starfun{C,RC}_add_capprox
wenzelm@17423
   598
  starfun_add_approx <-- starfunCR_add_approx
wenzelm@17423
   599
  starfun_inverse_inverse <-- starfunC_inverse_inverse
huffman@17442
   600
  starfun_divide <-- starfun{C,CR,RC}_divide
huffman@17442
   601
  starfun_n <-- starfun{Nat,C}_n
huffman@17442
   602
  starfun_n_mult <-- starfun{Nat,C}_n_mult
huffman@17442
   603
  starfun_n_add <-- starfun{Nat,C}_n_add
wenzelm@17423
   604
  starfun_n_add_minus <-- starfunNat_n_add_minus
huffman@17442
   605
  starfun_n_const_fun <-- starfun{Nat,C}_n_const_fun
huffman@17442
   606
  starfun_n_minus <-- starfun{Nat,C}_n_minus
huffman@17442
   607
  starfun_n_eq <-- starfun{Nat,C}_n_eq
huffman@17442
   608
huffman@17442
   609
  star_n_add <-- {hypreal,hypnat,hcomplex}_add
huffman@17442
   610
  star_n_minus <-- {hypreal,hcomplex}_minus
huffman@17442
   611
  star_n_diff <-- {hypreal,hcomplex}_diff
huffman@17442
   612
  star_n_mult <-- {hypreal,hcomplex}_mult
huffman@17442
   613
  star_n_inverse <-- {hypreal,hcomplex}_inverse
huffman@17442
   614
  star_n_le <-- {hypreal,hypnat}_le
huffman@17442
   615
  star_n_less <-- {hypreal,hypnat}_less
huffman@17442
   616
  star_n_zero_num <-- {hypreal,hypnat,hcomplex}_zero_num
huffman@17442
   617
  star_n_one_num <-- {hypreal,hypnat,hcomplex}_one_num
wenzelm@17423
   618
  star_n_abs <-- hypreal_hrabs
wenzelm@17423
   619
  star_n_divide <-- hcomplex_divide
wenzelm@17423
   620
huffman@17442
   621
  star_of_add <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_add
huffman@17442
   622
  star_of_minus <-- {hypreal_of_real,hcomplex_of_complex}_minus
wenzelm@17423
   623
  star_of_diff <-- hypreal_of_real_diff
huffman@17442
   624
  star_of_mult <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_mult
huffman@17442
   625
  star_of_one <-- {hypreal_of_real,hcomplex_of_complex}_one
huffman@17442
   626
  star_of_zero <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_zero
huffman@17442
   627
  star_of_le <-- {hypreal_of_real,hypnat_of_nat}_le_iff
huffman@17442
   628
  star_of_less <-- {hypreal_of_real,hypnat_of_nat}_less_iff
huffman@17442
   629
  star_of_eq <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_eq_iff
huffman@17442
   630
  star_of_inverse <-- {hypreal_of_real,hcomplex_of_complex}_inverse
huffman@17442
   631
  star_of_divide <-- {hypreal_of_real,hcomplex_of_complex}_divide
huffman@17442
   632
  star_of_of_nat <-- {hypreal_of_real,hcomplex_of_complex}_of_nat
huffman@17442
   633
  star_of_of_int <-- {hypreal_of_real,hcomplex_of_complex}_of_int
huffman@17442
   634
  star_of_number_of <-- {hypreal,hcomplex}_number_of
wenzelm@17423
   635
  star_of_number_less <-- number_of_less_hypreal_of_real_iff
wenzelm@17423
   636
  star_of_number_le <-- number_of_le_hypreal_of_real_iff
wenzelm@17423
   637
  star_of_eq_number <-- hypreal_of_real_eq_number_of_iff
wenzelm@17423
   638
  star_of_less_number <-- hypreal_of_real_less_number_of_iff
wenzelm@17423
   639
  star_of_le_number <-- hypreal_of_real_le_number_of_iff
wenzelm@17423
   640
  star_of_power <-- hypreal_of_real_power
wenzelm@17423
   641
  star_of_eq_0 <-- hcomplex_of_complex_zero_iff
wenzelm@17423
   642
huffman@17442
   643
* Hyperreal: new method "transfer" that implements the transfer
huffman@17442
   644
principle of nonstandard analysis. With a subgoal that mentions
huffman@17442
   645
nonstandard types like "'a star", the command "apply transfer"
huffman@17442
   646
replaces it with an equivalent one that mentions only standard types.
huffman@17442
   647
To be successful, all free variables must have standard types; non-
huffman@17442
   648
standard variables must have explicit universal quantifiers.
huffman@17442
   649
wenzelm@14655
   650
wenzelm@14682
   651
*** HOLCF ***
wenzelm@14682
   652
wenzelm@17533
   653
* Discontinued special version of 'constdefs' (which used to support
wenzelm@17533
   654
continuous functions) in favor of the general Pure one with full
wenzelm@17533
   655
type-inference.
wenzelm@17533
   656
wenzelm@17533
   657
* New simplification procedure for solving continuity conditions; it
wenzelm@17533
   658
is much faster on terms with many nested lambda abstractions (cubic
huffman@17442
   659
instead of exponential time).
huffman@17442
   660
wenzelm@17533
   661
* New syntax for domain package: selector names are now optional.
huffman@17442
   662
Parentheses should be omitted unless argument is lazy, for example:
huffman@17442
   663
huffman@17442
   664
  domain 'a stream = cons "'a" (lazy "'a stream")
huffman@17442
   665
wenzelm@17533
   666
* New command 'fixrec' for defining recursive functions with pattern
wenzelm@17533
   667
matching; defining multiple functions with mutual recursion is also
wenzelm@17533
   668
supported.  Patterns may include the constants cpair, spair, up, sinl,
wenzelm@17533
   669
sinr, or any data constructor defined by the domain package. The given
wenzelm@17533
   670
equations are proven as rewrite rules. See HOLCF/ex/Fixrec_ex.thy for
wenzelm@17533
   671
syntax and examples.
wenzelm@17533
   672
wenzelm@17533
   673
* New commands 'cpodef' and 'pcpodef' for defining predicate subtypes
wenzelm@17533
   674
of cpo and pcpo types. Syntax is exactly like the 'typedef' command,
wenzelm@17533
   675
but the proof obligation additionally includes an admissibility
wenzelm@17533
   676
requirement. The packages generate instances of class cpo or pcpo,
wenzelm@17533
   677
with continuity and strictness theorems for Rep and Abs.
huffman@17442
   678
huffman@17584
   679
* HOLCF: Many theorems have been renamed according to a more standard naming
huffman@17584
   680
scheme (INCOMPATIBILITY):
huffman@17584
   681
huffman@17584
   682
  foo_inject:  "foo$x = foo$y ==> x = y"
huffman@17584
   683
  foo_eq:      "(foo$x = foo$y) = (x = y)"
huffman@17584
   684
  foo_less:    "(foo$x << foo$y) = (x << y)"
huffman@17584
   685
  foo_strict:  "foo$UU = UU"
huffman@17584
   686
  foo_defined: "... ==> foo$x ~= UU"
huffman@17584
   687
  foo_defined_iff: "(foo$x = UU) = (x = UU)"
huffman@17584
   688
wenzelm@14682
   689
paulson@14885
   690
*** ZF ***
paulson@14885
   691
wenzelm@16234
   692
* ZF/ex: theories Group and Ring provide examples in abstract algebra,
wenzelm@16234
   693
including the First Isomorphism Theorem (on quotienting by the kernel
wenzelm@16234
   694
of a homomorphism).
wenzelm@15089
   695
wenzelm@15089
   696
* ZF/Simplifier: install second copy of type solver that actually
wenzelm@16234
   697
makes use of TC rules declared to Isar proof contexts (or locales);
wenzelm@16234
   698
the old version is still required for ML proof scripts.
wenzelm@15703
   699
wenzelm@15703
   700
wenzelm@17445
   701
*** Cube ***
wenzelm@17445
   702
wenzelm@17445
   703
* Converted to Isar theory format; use locales instead of axiomatic
wenzelm@17445
   704
theories.
wenzelm@17445
   705
wenzelm@17445
   706
wenzelm@15703
   707
*** ML ***
wenzelm@15703
   708
wenzelm@15973
   709
* Pure/library.ML no longer defines its own option datatype, but uses
wenzelm@16234
   710
that of the SML basis, which has constructors NONE and SOME instead of
wenzelm@16234
   711
None and Some, as well as exception Option.Option instead of OPTION.
wenzelm@16234
   712
The functions the, if_none, is_some, is_none have been adapted
wenzelm@16234
   713
accordingly, while Option.map replaces apsome.
wenzelm@15973
   714
wenzelm@16860
   715
* Pure/library.ML: the exception LIST has been given up in favour of
wenzelm@16860
   716
the standard exceptions Empty and Subscript, as well as
wenzelm@16860
   717
Library.UnequalLengths.  Function like Library.hd and Library.tl are
wenzelm@16860
   718
superceded by the standard hd and tl functions etc.
wenzelm@16860
   719
wenzelm@16860
   720
A number of basic list functions are no longer exported to the ML
wenzelm@16860
   721
toplevel, as they are variants of predefined functions.  The following
wenzelm@16234
   722
suggests how one can translate existing code:
wenzelm@15973
   723
wenzelm@15973
   724
    rev_append xs ys = List.revAppend (xs, ys)
wenzelm@15973
   725
    nth_elem (i, xs) = List.nth (xs, i)
wenzelm@15973
   726
    last_elem xs = List.last xs
wenzelm@15973
   727
    flat xss = List.concat xss
wenzelm@16234
   728
    seq fs = List.app fs
wenzelm@15973
   729
    partition P xs = List.partition P xs
wenzelm@15973
   730
    mapfilter f xs = List.mapPartial f xs
wenzelm@15973
   731
wenzelm@16860
   732
* Pure/library.ML: several combinators for linear functional
wenzelm@16860
   733
transformations, notably reverse application and composition:
wenzelm@16860
   734
wenzelm@17371
   735
  x |> f                f #> g
wenzelm@17371
   736
  (x, y) |-> f          f #-> g
wenzelm@16860
   737
haftmann@17495
   738
* Pure/library.ML: introduced/changed precedence of infix operators:
haftmann@17495
   739
haftmann@17495
   740
  infix 1 |> |-> ||> ||>> |>> |>>> #> #->;
haftmann@17495
   741
  infix 2 ?;
haftmann@17495
   742
  infix 3 o oo ooo oooo;
haftmann@17495
   743
  infix 4 ~~ upto downto;
haftmann@17495
   744
haftmann@17495
   745
Maybe INCOMPATIBILITY when any of those is used in conjunction with other
haftmann@17495
   746
infix operators.
haftmann@17495
   747
wenzelm@17408
   748
* Pure/library.ML: natural list combinators fold, fold_rev, and
haftmann@16869
   749
fold_map support linear functional transformations and nesting.  For
wenzelm@16860
   750
example:
wenzelm@16860
   751
wenzelm@16860
   752
  fold f [x1, ..., xN] y =
wenzelm@16860
   753
    y |> f x1 |> ... |> f xN
wenzelm@16860
   754
wenzelm@16860
   755
  (fold o fold) f [xs1, ..., xsN] y =
wenzelm@16860
   756
    y |> fold f xs1 |> ... |> fold f xsN
wenzelm@16860
   757
wenzelm@16860
   758
  fold f [x1, ..., xN] =
wenzelm@16860
   759
    f x1 #> ... #> f xN
wenzelm@16860
   760
wenzelm@16860
   761
  (fold o fold) f [xs1, ..., xsN] =
wenzelm@16860
   762
    fold f xs1 #> ... #> fold f xsN
wenzelm@16860
   763
wenzelm@17408
   764
* Pure/library.ML: the following selectors on type 'a option are
wenzelm@17408
   765
available:
wenzelm@17408
   766
wenzelm@17408
   767
  the:               'a option -> 'a  (*partial*)
wenzelm@17408
   768
  these:             'a option -> 'a  where 'a = 'b list
haftmann@17402
   769
  the_default: 'a -> 'a option -> 'a
haftmann@17402
   770
  the_list:          'a option -> 'a list
haftmann@17402
   771
wenzelm@17408
   772
* Pure/General: structure AList (cf. Pure/General/alist.ML) provides
wenzelm@17408
   773
basic operations for association lists, following natural argument
haftmann@17564
   774
order; moreover the explicit equality predicate passed here avoids
haftmann@17495
   775
potentially expensive polymorphic runtime equality checks.
haftmann@17495
   776
The old functions may be expressed as follows:
wenzelm@17408
   777
wenzelm@17408
   778
  assoc = uncurry (AList.lookup (op =))
wenzelm@17408
   779
  assocs = these oo AList.lookup (op =)
wenzelm@17408
   780
  overwrite = uncurry (AList.update (op =)) o swap
wenzelm@17408
   781
haftmann@17564
   782
* Pure/General: structure AList (cf. Pure/General/alist.ML) provides
haftmann@17564
   783
haftmann@17564
   784
  val make: ('a -> 'b) -> 'a list -> ('a * 'b) list
haftmann@17564
   785
  val find: ('a * 'b -> bool) -> ('c * 'b) list -> 'a -> 'c list
haftmann@17564
   786
haftmann@17564
   787
replacing make_keylist and keyfilter (occassionally used)
haftmann@17564
   788
Naive rewrites:
haftmann@17564
   789
haftmann@17564
   790
  make_keylist = AList.make
haftmann@17564
   791
  keyfilter = AList.find (op =)
haftmann@17564
   792
haftmann@17564
   793
* eq_fst and eq_snd now take explicit equality parameter, thus
haftmann@17564
   794
  avoiding eqtypes. Naive rewrites:
haftmann@17564
   795
haftmann@17564
   796
    eq_fst = eq_fst (op =)
haftmann@17564
   797
    eq_snd = eq_snd (op =)
haftmann@17564
   798
haftmann@17564
   799
* Removed deprecated apl and apr (rarely used).
haftmann@17564
   800
  Naive rewrites:
haftmann@17564
   801
haftmann@17564
   802
    apl (n, op) =>>= curry op n
haftmann@17564
   803
    apr (op, m) =>>= fn n => op (n, m)
haftmann@17564
   804
wenzelm@17408
   805
* Pure/General: structure OrdList (cf. Pure/General/ord_list.ML)
wenzelm@17408
   806
provides a reasonably efficient light-weight implementation of sets as
wenzelm@17408
   807
lists.
wenzelm@17408
   808
wenzelm@17408
   809
* Pure/General: generic tables (cf. Pure/General/table.ML) provide a
wenzelm@17408
   810
few new operations; existing lookup and update are now curried to
wenzelm@17408
   811
follow natural argument order (for use with fold etc.);
wenzelm@17408
   812
INCOMPATIBILITY, use (uncurry Symtab.lookup) etc. as last resort.
wenzelm@17408
   813
wenzelm@17408
   814
* Pure/General: output via the Isabelle channels of
wenzelm@17408
   815
writeln/warning/error etc. is now passed through Output.output, with a
wenzelm@17408
   816
hook for arbitrary transformations depending on the print_mode
wenzelm@17408
   817
(cf. Output.add_mode -- the first active mode that provides a output
wenzelm@17408
   818
function wins).  Already formatted output may be embedded into further
wenzelm@17408
   819
text via Output.raw; the result of Pretty.string_of/str_of and derived
wenzelm@17408
   820
functions (string_of_term/cterm/thm etc.) is already marked raw to
wenzelm@17408
   821
accommodate easy composition of diagnostic messages etc.  Programmers
wenzelm@17408
   822
rarely need to care about Output.output or Output.raw at all, with
wenzelm@17408
   823
some notable exceptions: Output.output is required when bypassing the
wenzelm@17408
   824
standard channels (writeln etc.), or in token translations to produce
wenzelm@17408
   825
properly formatted results; Output.raw is required when capturing
wenzelm@17408
   826
already output material that will eventually be presented to the user
wenzelm@17408
   827
a second time.  For the default print mode, both Output.output and
wenzelm@17408
   828
Output.raw have no effect.
wenzelm@17408
   829
wenzelm@17408
   830
* Pure/General: Output.time_accumulator NAME creates an operator ('a
wenzelm@17408
   831
-> 'b) -> 'a -> 'b to measure runtime and count invocations; the
wenzelm@17408
   832
cumulative results are displayed at the end of a batch session.
wenzelm@17408
   833
wenzelm@17408
   834
* Pure/General: File.sysify_path and File.quote_sysify path have been
wenzelm@17408
   835
replaced by File.platform_path and File.shell_path (with appropriate
wenzelm@17408
   836
hooks).  This provides a clean interface for unusual systems where the
wenzelm@17408
   837
internal and external process view of file names are different.
wenzelm@17408
   838
wenzelm@16689
   839
* Pure: more efficient orders for basic syntactic entities: added
wenzelm@16689
   840
fast_string_ord, fast_indexname_ord, fast_term_ord; changed sort_ord
wenzelm@16689
   841
and typ_ord to use fast_string_ord and fast_indexname_ord (term_ord is
wenzelm@16689
   842
NOT affected); structures Symtab, Vartab, Typtab, Termtab use the fast
wenzelm@16689
   843
orders now -- potential INCOMPATIBILITY for code that depends on a
wenzelm@16689
   844
particular order for Symtab.keys, Symtab.dest, etc. (consider using
wenzelm@16689
   845
Library.sort_strings on result).
wenzelm@16689
   846
wenzelm@17408
   847
* Pure/term.ML: combinators fold_atyps, fold_aterms, fold_term_types,
wenzelm@17408
   848
fold_types traverse types/terms from left to right, observing natural
wenzelm@17408
   849
argument order.  Supercedes previous foldl_XXX versions, add_frees,
wenzelm@17408
   850
add_vars etc. have been adapted as well: INCOMPATIBILITY.
wenzelm@17408
   851
wenzelm@16151
   852
* Pure: name spaces have been refined, with significant changes of the
wenzelm@16234
   853
internal interfaces -- INCOMPATIBILITY.  Renamed cond_extern(_table)
wenzelm@16234
   854
to extern(_table).  The plain name entry path is superceded by a
wenzelm@16234
   855
general 'naming' context, which also includes the 'policy' to produce
wenzelm@16234
   856
a fully qualified name and external accesses of a fully qualified
wenzelm@16234
   857
name; NameSpace.extend is superceded by context dependent
wenzelm@16234
   858
Sign.declare_name.  Several theory and proof context operations modify
wenzelm@16234
   859
the naming context.  Especially note Theory.restore_naming and
wenzelm@16234
   860
ProofContext.restore_naming to get back to a sane state; note that
wenzelm@16234
   861
Theory.add_path is no longer sufficient to recover from
wenzelm@16234
   862
Theory.absolute_path in particular.
wenzelm@16234
   863
wenzelm@16234
   864
* Pure: new flags short_names (default false) and unique_names
wenzelm@16234
   865
(default true) for controlling output of qualified names.  If
wenzelm@16234
   866
short_names is set, names are printed unqualified.  If unique_names is
wenzelm@16234
   867
reset, the name prefix is reduced to the minimum required to achieve
wenzelm@16234
   868
the original result when interning again, even if there is an overlap
wenzelm@16234
   869
with earlier declarations.
wenzelm@16151
   870
wenzelm@16456
   871
* Pure/TheoryDataFun: change of the argument structure; 'prep_ext' is
wenzelm@16456
   872
now 'extend', and 'merge' gets an additional Pretty.pp argument
wenzelm@16456
   873
(useful for printing error messages).  INCOMPATIBILITY.
wenzelm@16456
   874
wenzelm@16456
   875
* Pure: major reorganization of the theory context.  Type Sign.sg and
wenzelm@16456
   876
Theory.theory are now identified, referring to the universal
wenzelm@16456
   877
Context.theory (see Pure/context.ML).  Actual signature and theory
wenzelm@16456
   878
content is managed as theory data.  The old code and interfaces were
wenzelm@16456
   879
spread over many files and structures; the new arrangement introduces
wenzelm@16456
   880
considerable INCOMPATIBILITY to gain more clarity:
wenzelm@16456
   881
wenzelm@16456
   882
  Context -- theory management operations (name, identity, inclusion,
wenzelm@16456
   883
    parents, ancestors, merge, etc.), plus generic theory data;
wenzelm@16456
   884
wenzelm@16456
   885
  Sign -- logical signature and syntax operations (declaring consts,
wenzelm@16456
   886
    types, etc.), plus certify/read for common entities;
wenzelm@16456
   887
wenzelm@16456
   888
  Theory -- logical theory operations (stating axioms, definitions,
wenzelm@16456
   889
    oracles), plus a copy of logical signature operations (consts,
wenzelm@16456
   890
    types, etc.); also a few basic management operations (Theory.copy,
wenzelm@16456
   891
    Theory.merge, etc.)
wenzelm@16456
   892
wenzelm@16456
   893
The most basic sign_of operations (Theory.sign_of, Thm.sign_of_thm
wenzelm@16456
   894
etc.) as well as the sign field in Thm.rep_thm etc. have been retained
wenzelm@16456
   895
for convenience -- they merely return the theory.
wenzelm@16456
   896
wenzelm@17193
   897
* Pure: type Type.tsig is superceded by theory in most interfaces.
wenzelm@17193
   898
wenzelm@16547
   899
* Pure: the Isar proof context type is already defined early in Pure
wenzelm@16547
   900
as Context.proof (note that ProofContext.context and Proof.context are
wenzelm@16547
   901
aliases, where the latter is the preferred name).  This enables other
wenzelm@16547
   902
Isabelle components to refer to that type even before Isar is present.
wenzelm@16547
   903
wenzelm@16373
   904
* Pure/sign/theory: discontinued named name spaces (i.e. classK,
wenzelm@16373
   905
typeK, constK, axiomK, oracleK), but provide explicit operations for
wenzelm@16373
   906
any of these kinds.  For example, Sign.intern typeK is now
wenzelm@16373
   907
Sign.intern_type, Theory.hide_space Sign.typeK is now
wenzelm@16373
   908
Theory.hide_types.  Also note that former
wenzelm@16373
   909
Theory.hide_classes/types/consts are now
wenzelm@16373
   910
Theory.hide_classes_i/types_i/consts_i, while the non '_i' versions
wenzelm@16373
   911
internalize their arguments!  INCOMPATIBILITY.
wenzelm@16373
   912
wenzelm@16506
   913
* Pure: get_thm interface (of PureThy and ProofContext) expects
wenzelm@16506
   914
datatype thmref (with constructors Name and NameSelection) instead of
wenzelm@16506
   915
plain string -- INCOMPATIBILITY;
wenzelm@16506
   916
wenzelm@16151
   917
* Pure: cases produced by proof methods specify options, where NONE
wenzelm@16234
   918
means to remove case bindings -- INCOMPATIBILITY in
wenzelm@16234
   919
(RAW_)METHOD_CASES.
wenzelm@16151
   920
wenzelm@16373
   921
* Pure: the following operations retrieve axioms or theorems from a
wenzelm@16373
   922
theory node or theory hierarchy, respectively:
wenzelm@16373
   923
wenzelm@16373
   924
  Theory.axioms_of: theory -> (string * term) list
wenzelm@16373
   925
  Theory.all_axioms_of: theory -> (string * term) list
wenzelm@16373
   926
  PureThy.thms_of: theory -> (string * thm) list
wenzelm@16373
   927
  PureThy.all_thms_of: theory -> (string * thm) list
wenzelm@16373
   928
wenzelm@16718
   929
* Pure: print_tac now outputs the goal through the trace channel.
wenzelm@16718
   930
wenzelm@17408
   931
* Isar toplevel: improved diagnostics, mostly for Poly/ML only.
wenzelm@17408
   932
Reference Toplevel.debug (default false) controls detailed printing
wenzelm@17408
   933
and tracing of low-level exceptions; Toplevel.profiling (default 0)
wenzelm@17408
   934
controls execution profiling -- set to 1 for time and 2 for space
wenzelm@17408
   935
(both increase the runtime).
wenzelm@17408
   936
wenzelm@17408
   937
* Isar session: The initial use of ROOT.ML is now always timed,
wenzelm@17408
   938
i.e. the log will show the actual process times, in contrast to the
wenzelm@17408
   939
elapsed wall-clock time that the outer shell wrapper produces.
wenzelm@17408
   940
wenzelm@17408
   941
* Simplifier: improved handling of bound variables (nameless
wenzelm@16997
   942
representation, avoid allocating new strings).  Simprocs that invoke
wenzelm@16997
   943
the Simplifier recursively should use Simplifier.inherit_bounds to
wenzelm@16997
   944
avoid local name clashes.
wenzelm@16997
   945
wenzelm@17408
   946
* Provers: Simplifier and Classical Reasoner now support proof context
wenzelm@17408
   947
dependent plug-ins (simprocs, solvers, wrappers etc.).  These extra
wenzelm@17408
   948
components are stored in the theory and patched into the
wenzelm@16234
   949
simpset/claset when used in an Isar proof context.  Context dependent
wenzelm@16234
   950
components are maintained by the following theory operations:
wenzelm@16234
   951
wenzelm@16234
   952
  Simplifier.add_context_simprocs
wenzelm@16234
   953
  Simplifier.del_context_simprocs
wenzelm@16234
   954
  Simplifier.set_context_subgoaler
wenzelm@16234
   955
  Simplifier.reset_context_subgoaler
wenzelm@16234
   956
  Simplifier.add_context_looper
wenzelm@16234
   957
  Simplifier.del_context_looper
wenzelm@16234
   958
  Simplifier.add_context_unsafe_solver
wenzelm@16234
   959
  Simplifier.add_context_safe_solver
wenzelm@16234
   960
wenzelm@16234
   961
  Classical.add_context_safe_wrapper
wenzelm@16234
   962
  Classical.del_context_safe_wrapper
wenzelm@16234
   963
  Classical.add_context_unsafe_wrapper
wenzelm@16234
   964
  Classical.del_context_unsafe_wrapper
wenzelm@16234
   965
wenzelm@16234
   966
IMPORTANT NOTE: proof tools (methods etc.) need to use
wenzelm@16234
   967
local_simpset_of and local_claset_of to instead of the primitive
wenzelm@16234
   968
Simplifier.get_local_simpset and Classical.get_local_claset,
wenzelm@16234
   969
respectively, in order to see the context dependent fields!
wenzelm@16234
   970
wenzelm@17166
   971
* ML functions legacy_bindings and use_legacy_bindings produce ML fact
wenzelm@17166
   972
bindings for all theorems stored within a given theory; this may help
wenzelm@17166
   973
in porting non-Isar theories to Isar ones, while keeping ML proof
wenzelm@17166
   974
scripts for the time being.
wenzelm@17166
   975
wenzelm@17457
   976
* ML operator HTML.with_charset specifies the charset begin used for
wenzelm@17457
   977
generated HTML files.  For example:
wenzelm@17457
   978
wenzelm@17457
   979
  HTML.with_charset "utf-8" use_thy "Hebrew";
wenzelm@17538
   980
  HTML.with_charset "utf-8" use_thy "Chinese";
wenzelm@17457
   981
wenzelm@16234
   982
wenzelm@16234
   983
*** System ***
wenzelm@16234
   984
wenzelm@16234
   985
* Allow symlinks to all proper Isabelle executables (Isabelle,
wenzelm@16234
   986
isabelle, isatool etc.).
wenzelm@16234
   987
wenzelm@16234
   988
* ISABELLE_DOC_FORMAT setting specifies preferred document format (for
wenzelm@16234
   989
isatool doc, isatool mkdir, display_drafts etc.).
wenzelm@16234
   990
wenzelm@16234
   991
* isatool usedir: option -f allows specification of the ML file to be
wenzelm@16234
   992
used by Isabelle; default is ROOT.ML.
wenzelm@16234
   993
wenzelm@16251
   994
* New isatool version outputs the version identifier of the Isabelle
wenzelm@16251
   995
distribution being used.
wenzelm@16251
   996
wenzelm@16251
   997
* HOL: new isatool dimacs2hol converts files in DIMACS CNF format
wenzelm@16234
   998
(containing Boolean satisfiability problems) into Isabelle/HOL
wenzelm@16234
   999
theories.
wenzelm@15703
  1000
wenzelm@15703
  1001
wenzelm@14655
  1002
wenzelm@14606
  1003
New in Isabelle2004 (April 2004)
wenzelm@14606
  1004
--------------------------------
wenzelm@13280
  1005
skalberg@14171
  1006
*** General ***
skalberg@14171
  1007
ballarin@14398
  1008
* Provers/order.ML:  new efficient reasoner for partial and linear orders.
ballarin@14398
  1009
  Replaces linorder.ML.
ballarin@14398
  1010
wenzelm@14606
  1011
* Pure: Greek letters (except small lambda, \<lambda>), as well as Gothic
wenzelm@14606
  1012
  (\<aa>...\<zz>\<AA>...\<ZZ>), calligraphic (\<A>...\<Z>), and Euler
skalberg@14173
  1013
  (\<a>...\<z>), are now considered normal letters, and can therefore
skalberg@14173
  1014
  be used anywhere where an ASCII letter (a...zA...Z) has until
skalberg@14173
  1015
  now. COMPATIBILITY: This obviously changes the parsing of some
skalberg@14173
  1016
  terms, especially where a symbol has been used as a binder, say
skalberg@14173
  1017
  '\<Pi>x. ...', which is now a type error since \<Pi>x will be parsed
skalberg@14173
  1018
  as an identifier.  Fix it by inserting a space around former
skalberg@14173
  1019
  symbols.  Call 'isatool fixgreek' to try to fix parsing errors in
skalberg@14173
  1020
  existing theory and ML files.
skalberg@14171
  1021
paulson@14237
  1022
* Pure: Macintosh and Windows line-breaks are now allowed in theory files.
paulson@14237
  1023
wenzelm@14731
  1024
* Pure: single letter sub/superscripts (\<^isub> and \<^isup>) are now
wenzelm@14731
  1025
  allowed in identifiers. Similar to Greek letters \<^isub> is now considered
wenzelm@14731
  1026
  a normal (but invisible) letter. For multiple letter subscripts repeat
wenzelm@14731
  1027
  \<^isub> like this: x\<^isub>1\<^isub>2.
kleing@14233
  1028
kleing@14333
  1029
* Pure: There are now sub-/superscripts that can span more than one
kleing@14333
  1030
  character. Text between \<^bsub> and \<^esub> is set in subscript in
wenzelm@14606
  1031
  ProofGeneral and LaTeX, text between \<^bsup> and \<^esup> in
wenzelm@14606
  1032
  superscript. The new control characters are not identifier parts.
kleing@14333
  1033
schirmer@14561
  1034
* Pure: Control-symbols of the form \<^raw:...> will literally print the
wenzelm@14606
  1035
  content of "..." to the latex file instead of \isacntrl... . The "..."
wenzelm@14606
  1036
  may consist of any printable characters excluding the end bracket >.
schirmer@14361
  1037
paulson@14237
  1038
* Pure: Using new Isar command "finalconsts" (or the ML functions
paulson@14237
  1039
  Theory.add_finals or Theory.add_finals_i) it is now possible to
paulson@14237
  1040
  declare constants "final", which prevents their being given a definition
paulson@14237
  1041
  later.  It is useful for constants whose behaviour is fixed axiomatically
skalberg@14224
  1042
  rather than definitionally, such as the meta-logic connectives.
skalberg@14224
  1043
wenzelm@14606
  1044
* Pure: 'instance' now handles general arities with general sorts
wenzelm@14606
  1045
  (i.e. intersections of classes),
skalberg@14503
  1046
kleing@14547
  1047
* Presentation: generated HTML now uses a CSS style sheet to make layout
wenzelm@14731
  1048
  (somewhat) independent of content. It is copied from lib/html/isabelle.css.
kleing@14547
  1049
  It can be changed to alter the colors/layout of generated pages.
kleing@14547
  1050
wenzelm@14556
  1051
ballarin@14175
  1052
*** Isar ***
ballarin@14175
  1053
ballarin@14508
  1054
* Tactic emulation methods rule_tac, erule_tac, drule_tac, frule_tac,
ballarin@14508
  1055
  cut_tac, subgoal_tac and thin_tac:
ballarin@14175
  1056
  - Now understand static (Isar) contexts.  As a consequence, users of Isar
ballarin@14175
  1057
    locales are no longer forced to write Isar proof scripts.
ballarin@14175
  1058
    For details see Isar Reference Manual, paragraph 4.3.2: Further tactic
ballarin@14175
  1059
    emulations.
ballarin@14175
  1060
  - INCOMPATIBILITY: names of variables to be instantiated may no
ballarin@14211
  1061
    longer be enclosed in quotes.  Instead, precede variable name with `?'.
ballarin@14211
  1062
    This is consistent with the instantiation attribute "where".
ballarin@14211
  1063
ballarin@14257
  1064
* Attributes "where" and "of":
ballarin@14285
  1065
  - Now take type variables of instantiated theorem into account when reading
ballarin@14285
  1066
    the instantiation string.  This fixes a bug that caused instantiated
ballarin@14285
  1067
    theorems to have too special types in some circumstances.
ballarin@14285
  1068
  - "where" permits explicit instantiations of type variables.
ballarin@14257
  1069
wenzelm@14556
  1070
* Calculation commands "moreover" and "also" no longer interfere with
wenzelm@14556
  1071
  current facts ("this"), admitting arbitrary combinations with "then"
wenzelm@14556
  1072
  and derived forms.
kleing@14283
  1073
ballarin@14211
  1074
* Locales:
ballarin@14211
  1075
  - Goal statements involving the context element "includes" no longer
ballarin@14211
  1076
    generate theorems with internal delta predicates (those ending on
ballarin@14211
  1077
    "_axioms") in the premise.
ballarin@14211
  1078
    Resolve particular premise with <locale>.intro to obtain old form.
ballarin@14211
  1079
  - Fixed bug in type inference ("unify_frozen") that prevented mix of target
ballarin@14211
  1080
    specification and "includes" elements in goal statement.
ballarin@14254
  1081
  - Rule sets <locale>.intro and <locale>.axioms no longer declared as
ballarin@14254
  1082
    [intro?] and [elim?] (respectively) by default.
ballarin@14508
  1083
  - Experimental command for instantiation of locales in proof contexts:
ballarin@14551
  1084
        instantiate <label>[<attrs>]: <loc>
ballarin@14508
  1085
    Instantiates locale <loc> and adds all its theorems to the current context
ballarin@14551
  1086
    taking into account their attributes.  Label and attrs are optional
ballarin@14551
  1087
    modifiers, like in theorem declarations.  If present, names of
ballarin@14551
  1088
    instantiated theorems are qualified with <label>, and the attributes
ballarin@14551
  1089
    <attrs> are applied after any attributes these theorems might have already.
ballarin@14551
  1090
      If the locale has assumptions, a chained fact of the form
ballarin@14508
  1091
    "<loc> t1 ... tn" is expected from which instantiations of the parameters
ballarin@14551
  1092
    are derived.  The command does not support old-style locales declared
ballarin@14551
  1093
    with "locale (open)".
ballarin@14551
  1094
      A few (very simple) examples can be found in FOL/ex/LocaleInst.thy.
ballarin@14175
  1095
ballarin@14175
  1096
* HOL: Tactic emulation methods induct_tac and case_tac understand static
ballarin@14175
  1097
  (Isar) contexts.
ballarin@14175
  1098
wenzelm@14556
  1099
kleing@14136
  1100
*** HOL ***
kleing@14136
  1101
kleing@14624
  1102
* Proof import: new image HOL4 contains the imported library from
kleing@14624
  1103
  the HOL4 system with about 2500 theorems. It is imported by
kleing@14624
  1104
  replaying proof terms produced by HOL4 in Isabelle. The HOL4 image
kleing@14624
  1105
  can be used like any other Isabelle image.  See
kleing@14624
  1106
  HOL/Import/HOL/README for more information.
kleing@14624
  1107
ballarin@14398
  1108
* Simplifier:
ballarin@14398
  1109
  - Much improved handling of linear and partial orders.
ballarin@14398
  1110
    Reasoners for linear and partial orders are set up for type classes
ballarin@14398
  1111
    "linorder" and "order" respectively, and are added to the default simpset
ballarin@14398
  1112
    as solvers.  This means that the simplifier can build transitivity chains
ballarin@14398
  1113
    to solve goals from the assumptions.
ballarin@14398
  1114
  - INCOMPATIBILITY: old proofs break occasionally.  Typically, applications
ballarin@14398
  1115
    of blast or auto after simplification become unnecessary because the goal
ballarin@14398
  1116
    is solved by simplification already.
ballarin@14398
  1117
wenzelm@14731
  1118
* Numerics: new theory Ring_and_Field contains over 250 basic numerical laws,
paulson@14389
  1119
    all proved in axiomatic type classes for semirings, rings and fields.
paulson@14389
  1120
paulson@14389
  1121
* Numerics:
paulson@14389
  1122
  - Numeric types (nat, int, and in HOL-Complex rat, real, complex, etc.) are
wenzelm@14731
  1123
    now formalized using the Ring_and_Field theory mentioned above.
paulson@14389
  1124
  - INCOMPATIBILITY: simplification and arithmetic behaves somewhat differently
paulson@14389
  1125
    than before, because now they are set up once in a generic manner.
wenzelm@14731
  1126
  - INCOMPATIBILITY: many type-specific arithmetic laws have gone.
paulson@14480
  1127
    Look for the general versions in Ring_and_Field (and Power if they concern
paulson@14480
  1128
    exponentiation).
paulson@14389
  1129
paulson@14401
  1130
* Type "rat" of the rational numbers is now available in HOL-Complex.
paulson@14389
  1131
schirmer@14255
  1132
* Records:
schirmer@14255
  1133
  - Record types are now by default printed with their type abbreviation
schirmer@14255
  1134
    instead of the list of all field types. This can be configured via
schirmer@14255
  1135
    the reference "print_record_type_abbr".
wenzelm@14731
  1136
  - Simproc "record_upd_simproc" for simplification of multiple updates added
schirmer@14255
  1137
    (not enabled by default).
schirmer@14427
  1138
  - Simproc "record_ex_sel_eq_simproc" to simplify EX x. sel r = x resp.
schirmer@14427
  1139
    EX x. x = sel r to True (not enabled by default).
schirmer@14255
  1140
  - Tactic "record_split_simp_tac" to split and simplify records added.
wenzelm@14731
  1141
kleing@14136
  1142
* 'specification' command added, allowing for definition by
skalberg@14224
  1143
  specification.  There is also an 'ax_specification' command that
skalberg@14224
  1144
  introduces the new constants axiomatically.
kleing@14136
  1145
nipkow@14375
  1146
* arith(_tac) is now able to generate counterexamples for reals as well.
nipkow@14375
  1147
ballarin@14399
  1148
* HOL-Algebra: new locale "ring" for non-commutative rings.
ballarin@14399
  1149
paulson@14243
  1150
* HOL-ex: InductiveInvariant_examples illustrates advanced recursive function
kleing@14610
  1151
  definitions, thanks to Sava Krsti\'{c} and John Matthews.
kleing@14610
  1152
wenzelm@14731
  1153
* HOL-Matrix: a first theory for matrices in HOL with an application of
kleing@14610
  1154
  matrix theory to linear programming.
kleing@14136
  1155
nipkow@14380
  1156
* Unions and Intersections:
nipkow@15119
  1157
  The latex output syntax of UN and INT has been changed
nipkow@15119
  1158
  from "\Union x \in A. B" to "\Union_{x \in A} B"
nipkow@15119
  1159
  i.e. the index formulae has become a subscript.
nipkow@15119
  1160
  Similarly for "\Union x. B", and for \Inter instead of \Union.
nipkow@14380
  1161
kleing@14418
  1162
* Unions and Intersections over Intervals:
wenzelm@14731
  1163
  There is new short syntax "UN i<=n. A" for "UN i:{0..n}. A". There is
wenzelm@14731
  1164
  also an x-symbol version with subscripts "\<Union>\<^bsub>i <= n\<^esub>. A"
kleing@14418
  1165
  like in normal math, and corresponding versions for < and for intersection.
kleing@14418
  1166
nipkow@15677
  1167
* HOL/List: Ordering "lexico" is renamed "lenlex" and the standard
nipkow@15677
  1168
  lexicographic dictonary ordering has been added as "lexord".
nipkow@15677
  1169
paulson@14401
  1170
* ML: the legacy theory structures Int and List have been removed. They had
paulson@14401
  1171
  conflicted with ML Basis Library structures having the same names.
nipkow@14380
  1172
webertj@14464
  1173
* 'refute' command added to search for (finite) countermodels.  Only works
webertj@14464
  1174
  for a fragment of HOL.  The installation of an external SAT solver is
webertj@14464
  1175
  highly recommended.  See "HOL/Refute.thy" for details.
webertj@14464
  1176
berghofe@14602
  1177
* 'quickcheck' command: Allows to find counterexamples by evaluating
berghofe@14602
  1178
  formulae under an assignment of free variables to random values.
berghofe@14602
  1179
  In contrast to 'refute', it can deal with inductive datatypes,
berghofe@14602
  1180
  but cannot handle quantifiers. See "HOL/ex/Quickcheck_Examples.thy"
berghofe@14602
  1181
  for examples.
webertj@14464
  1182
wenzelm@14606
  1183
oheimb@14536
  1184
*** HOLCF ***
oheimb@14536
  1185
oheimb@14536
  1186
* Streams now come with concatenation and are part of the HOLCF image
oheimb@14536
  1187
wenzelm@14572
  1188
wenzelm@14572
  1189
kleing@14136
  1190
New in Isabelle2003 (May 2003)
wenzelm@14606
  1191
------------------------------
kleing@14136
  1192
wenzelm@13280
  1193
*** General ***
wenzelm@13280
  1194
berghofe@13618
  1195
* Provers/simplifier:
berghofe@13618
  1196
nipkow@13781
  1197
  - Completely reimplemented method simp (ML: Asm_full_simp_tac):
berghofe@13618
  1198
    Assumptions are now subject to complete mutual simplification,
berghofe@13618
  1199
    not just from left to right. The simplifier now preserves
berghofe@13618
  1200
    the order of assumptions.
berghofe@13618
  1201
berghofe@13618
  1202
    Potential INCOMPATIBILITY:
berghofe@13618
  1203
nipkow@13781
  1204
    -- simp sometimes diverges where the old version did
nipkow@13781
  1205
       not, e.g. invoking simp on the goal
berghofe@13618
  1206
berghofe@13618
  1207
        [| P (f x); y = x; f x = f y |] ==> Q
berghofe@13618
  1208
nipkow@13781
  1209
       now gives rise to the infinite reduction sequence
nipkow@13781
  1210
nipkow@13781
  1211
        P(f x) --(f x = f y)--> P(f y) --(y = x)--> P(f x) --(f x = f y)--> ...
nipkow@13781
  1212
nipkow@13781
  1213
       Using "simp (asm_lr)" (ML: Asm_lr_simp_tac) instead often solves this
nipkow@13781
  1214
       kind of problem.
nipkow@13781
  1215
nipkow@13781
  1216
    -- Tactics combining classical reasoner and simplification (such as auto)
nipkow@13781
  1217
       are also affected by this change, because many of them rely on
nipkow@13781
  1218
       simp. They may sometimes diverge as well or yield a different numbers
nipkow@13781
  1219
       of subgoals. Try to use e.g. force, fastsimp, or safe instead of auto
nipkow@13781
  1220
       in case of problems. Sometimes subsequent calls to the classical
nipkow@13781
  1221
       reasoner will fail because a preceeding call to the simplifier too
nipkow@13781
  1222
       eagerly simplified the goal, e.g. deleted redundant premises.
berghofe@13618
  1223
berghofe@13618
  1224
  - The simplifier trace now shows the names of the applied rewrite rules
berghofe@13618
  1225
nipkow@13829
  1226
  - You can limit the number of recursive invocations of the simplifier
nipkow@13829
  1227
    during conditional rewriting (where the simplifie tries to solve the
nipkow@13829
  1228
    conditions before applying the rewrite rule):
nipkow@13829
  1229
    ML "simp_depth_limit := n"
nipkow@13829
  1230
    where n is an integer. Thus you can force termination where previously
nipkow@13829
  1231
    the simplifier would diverge.
nipkow@13829
  1232
ballarin@13835
  1233
  - Accepts free variables as head terms in congruence rules.  Useful in Isar.
nipkow@13829
  1234
ballarin@13938
  1235
  - No longer aborts on failed congruence proof.  Instead, the
ballarin@13938
  1236
    congruence is ignored.
ballarin@13938
  1237
berghofe@14008
  1238
* Pure: New generic framework for extracting programs from constructive
berghofe@14008
  1239
  proofs. See HOL/Extraction.thy for an example instantiation, as well
berghofe@14008
  1240
  as HOL/Extraction for some case studies.
berghofe@14008
  1241
nipkow@13868
  1242
* Pure: The main goal of the proof state is no longer shown by default, only
nipkow@13868
  1243
the subgoals. This behaviour is controlled by a new flag.
ballarin@13835
  1244
   PG menu: Isabelle/Isar -> Settings -> Show Main Goal
nipkow@13815
  1245
(ML: Proof.show_main_goal).
nipkow@13815
  1246
nipkow@13815
  1247
* Pure: You can find all matching introduction rules for subgoal 1, i.e. all
nipkow@13815
  1248
rules whose conclusion matches subgoal 1:
nipkow@13815
  1249
      PG menu: Isabelle/Isar -> Show me -> matching rules
nipkow@13815
  1250
The rules are ordered by how closely they match the subgoal.
nipkow@13815
  1251
In particular, rules that solve a subgoal outright are displayed first
nipkow@13815
  1252
(or rather last, the way they are printed).
nipkow@13815
  1253
(ML: ProofGeneral.print_intros())
nipkow@13815
  1254
nipkow@13815
  1255
* Pure: New flag trace_unify_fail causes unification to print
nipkow@13781
  1256
diagnostic information (PG: in trace buffer) when it fails. This is
nipkow@13781
  1257
useful for figuring out why single step proofs like rule, erule or
nipkow@13781
  1258
assumption failed.
nipkow@13781
  1259
nipkow@13815
  1260
* Pure: Locale specifications now produce predicate definitions
wenzelm@13410
  1261
according to the body of text (covering assumptions modulo local
wenzelm@13410
  1262
definitions); predicate "loc_axioms" covers newly introduced text,
wenzelm@13410
  1263
while "loc" is cumulative wrt. all included locale expressions; the
wenzelm@13410
  1264
latter view is presented only on export into the global theory
wenzelm@13410
  1265
context; potential INCOMPATIBILITY, use "(open)" option to fall back
wenzelm@13410
  1266
on the old view without predicates;
wenzelm@13410
  1267
wenzelm@13459
  1268
* Pure: predefined locales "var" and "struct" are useful for sharing
wenzelm@13459
  1269
parameters (as in CASL, for example); just specify something like
wenzelm@13459
  1270
``var x + var y + struct M'' as import;
wenzelm@13459
  1271
wenzelm@13463
  1272
* Pure: improved thms_containing: proper indexing of facts instead of
wenzelm@13463
  1273
raw theorems; check validity of results wrt. current name space;
wenzelm@13463
  1274
include local facts of proof configuration (also covers active
wenzelm@13541
  1275
locales), cover fixed variables in index; may use "_" in term
wenzelm@13541
  1276
specification; an optional limit for the number of printed facts may
wenzelm@13541
  1277
be given (the default is 40);
wenzelm@13541
  1278
wenzelm@13541
  1279
* Pure: disallow duplicate fact bindings within new-style theory files
wenzelm@13541
  1280
(batch-mode only);
wenzelm@13540
  1281
wenzelm@13463
  1282
* Provers: improved induct method: assumptions introduced by case
wenzelm@13463
  1283
"foo" are split into "foo.hyps" (from the rule) and "foo.prems" (from
wenzelm@13463
  1284
the goal statement); "foo" still refers to all facts collectively;
wenzelm@13463
  1285
paulson@13550
  1286
* Provers: the function blast.overloaded has been removed: all constants
paulson@13550
  1287
are regarded as potentially overloaded, which improves robustness in exchange
paulson@13550
  1288
for slight decrease in efficiency;
paulson@13550
  1289
nipkow@13781
  1290
* Provers/linorder: New generic prover for transitivity reasoning over
nipkow@13781
  1291
linear orders.  Note: this prover is not efficient!
nipkow@13781
  1292
wenzelm@13522
  1293
* Isar: preview of problems to finish 'show' now produce an error
wenzelm@13522
  1294
rather than just a warning (in interactive mode);
wenzelm@13522
  1295
wenzelm@13280
  1296
nipkow@13158
  1297
*** HOL ***
nipkow@13158
  1298
nipkow@13899
  1299
* arith(_tac)
nipkow@13899
  1300
nipkow@13899
  1301
 - Produces a counter example if it cannot prove a goal.
nipkow@13899
  1302
   Note that the counter example may be spurious if the goal is not a formula
nipkow@13899
  1303
   of quantifier-free linear arithmetic.
nipkow@13899
  1304
   In ProofGeneral the counter example appears in the trace buffer.
nipkow@13899
  1305
nipkow@13899
  1306
 - Knows about div k and mod k where k is a numeral of type nat or int.
nipkow@13899
  1307
nipkow@13899
  1308
 - Calls full Presburger arithmetic (by Amine Chaieb) if quantifier-free
nipkow@13899
  1309
   linear arithmetic fails. This takes account of quantifiers and divisibility.
wenzelm@14731
  1310
   Presburger arithmetic can also be called explicitly via presburger(_tac).
nipkow@13899
  1311
nipkow@13899
  1312
* simp's arithmetic capabilities have been enhanced a bit: it now
nipkow@13899
  1313
takes ~= in premises into account (by performing a case split);
nipkow@13899
  1314
nipkow@13899
  1315
* simp reduces "m*(n div m) + n mod m" to n, even if the two summands
nipkow@13899
  1316
are distributed over a sum of terms;
nipkow@13899
  1317
ballarin@13735
  1318
* New tactic "trans_tac" and method "trans" instantiate
ballarin@13735
  1319
Provers/linorder.ML for axclasses "order" and "linorder" (predicates
wenzelm@14731
  1320
"<=", "<" and "=").
wenzelm@14731
  1321
wenzelm@14731
  1322
* function INCOMPATIBILITIES: Pi-sets have been redefined and moved from main
paulson@13587
  1323
HOL to Library/FuncSet; constant "Fun.op o" is now called "Fun.comp";
paulson@13587
  1324
wenzelm@13443
  1325
* 'typedef' command has new option "open" to suppress the set
wenzelm@13443
  1326
definition;
wenzelm@13443
  1327
wenzelm@13522
  1328
* functions Min and Max on finite sets have been introduced (theory
wenzelm@13522
  1329
Finite_Set);
nipkow@13492
  1330
wenzelm@13443
  1331
* attribute [symmetric] now works for relations as well; it turns
wenzelm@13443
  1332
(x,y) : R^-1 into (y,x) : R, and vice versa;
wenzelm@13443
  1333
nipkow@13613
  1334
* induct over a !!-quantified statement (say !!x1..xn):
nipkow@13613
  1335
  each "case" automatically performs "fix x1 .. xn" with exactly those names.
nipkow@13613
  1336
nipkow@13899
  1337
* Map: `empty' is no longer a constant but a syntactic abbreviation for
nipkow@13899
  1338
%x. None. Warning: empty_def now refers to the previously hidden definition
nipkow@13899
  1339
of the empty set.
nipkow@13899
  1340
ballarin@14018
  1341
* Algebra: formalization of classical algebra.  Intended as base for
ballarin@14018
  1342
any algebraic development in Isabelle.  Currently covers group theory
ballarin@14018
  1343
(up to Sylow's theorem) and ring theory (Universal Property of
ballarin@14018
  1344
Univariate Polynomials).  Contributions welcome;
paulson@13960
  1345
paulson@13960
  1346
* GroupTheory: deleted, since its material has been moved to Algebra;
paulson@13960
  1347
wenzelm@14731
  1348
* Complex: new directory of the complex numbers with numeric constants,
wenzelm@14731
  1349
nonstandard complex numbers, and some complex analysis, standard and
paulson@13966
  1350
nonstandard (Jacques Fleuriot);
paulson@13966
  1351
paulson@13966
  1352
* HOL-Complex: new image for analysis, replacing HOL-Real and HOL-Hyperreal;
paulson@13966
  1353
wenzelm@14731
  1354
* Hyperreal: introduced Gauge integration and hyperreal logarithms (Jacques
paulson@13966
  1355
Fleuriot);
paulson@13960
  1356
wenzelm@13549
  1357
* Real/HahnBanach: updated and adapted to locales;
wenzelm@13549
  1358
ballarin@13995
  1359
* NumberTheory: added Gauss's law of quadratic reciprocity (by Avigad,
ballarin@13995
  1360
Gray and Kramer);
paulson@13872
  1361
paulson@13872
  1362
* UNITY: added the Meier-Sanders theory of progress sets;
paulson@13872
  1363
kleing@14011
  1364
* MicroJava: bytecode verifier and lightweight bytecode verifier
kleing@14011
  1365
as abstract algorithms, instantiated to the JVM;
kleing@14011
  1366
schirmer@14010
  1367
* Bali: Java source language formalization. Type system, operational
schirmer@14010
  1368
semantics, axiomatic semantics. Supported language features:
schirmer@14010
  1369
classes, interfaces, objects,virtual methods, static methods,
schirmer@14010
  1370
static/instance fields, arrays, access modifiers, definite
schirmer@14010
  1371
assignment, exceptions.
wenzelm@13549
  1372
kleing@14011
  1373
wenzelm@13549
  1374
*** ZF ***
wenzelm@13549
  1375
webertj@15154
  1376
* ZF/Constructible: consistency proof for AC (Gdel's constructible
wenzelm@13549
  1377
universe, etc.);
wenzelm@13549
  1378
paulson@13872
  1379
* Main ZF: virtually all theories converted to new-style format;
nipkow@13518
  1380
wenzelm@13280
  1381
wenzelm@13478
  1382
*** ML ***
wenzelm@13478
  1383
wenzelm@13478
  1384
* Pure: Tactic.prove provides sane interface for internal proofs;
wenzelm@13478
  1385
omits the infamous "standard" operation, so this is more appropriate
wenzelm@13478
  1386
than prove_goalw_cterm in many situations (e.g. in simprocs);
wenzelm@13478
  1387
wenzelm@13478
  1388
* Pure: improved error reporting of simprocs;
wenzelm@13478
  1389
wenzelm@13478
  1390
* Provers: Simplifier.simproc(_i) provides sane interface for setting
wenzelm@13478
  1391
up simprocs;
wenzelm@13478
  1392
wenzelm@13478
  1393
kleing@13953
  1394
*** Document preparation ***
kleing@13953
  1395
kleing@13953
  1396
* uses \par instead of \\ for line breaks in theory text. This may
kleing@13953
  1397
shift some page breaks in large documents. To get the old behaviour
kleing@13953
  1398
use \renewcommand{\isanewline}{\mbox{}\\\mbox{}} in root.tex.
kleing@13953
  1399
wenzelm@14731
  1400
* minimized dependencies of isabelle.sty and isabellesym.sty on
kleing@13953
  1401
other packages
kleing@13953
  1402
kleing@13953
  1403
* \<euro> now needs package babel/greek instead of marvosym (which
kleing@13953
  1404
broke \Rightarrow)
kleing@13953
  1405
wenzelm@14731
  1406
* normal size for \<zero>...\<nine> (uses \mathbf instead of
kleing@13954
  1407
textcomp package)
kleing@13953
  1408
wenzelm@13280
  1409
wenzelm@14572
  1410
wenzelm@12984
  1411
New in Isabelle2002 (March 2002)
wenzelm@12984
  1412
--------------------------------
wenzelm@11474
  1413
wenzelm@11572
  1414
*** Document preparation ***
wenzelm@11572
  1415
wenzelm@11842
  1416
* greatly simplified document preparation setup, including more
wenzelm@11842
  1417
graceful interpretation of isatool usedir -i/-d/-D options, and more
wenzelm@11842
  1418
instructive isatool mkdir; users should basically be able to get
wenzelm@12899
  1419
started with "isatool mkdir HOL Test && isatool make"; alternatively,
wenzelm@12899
  1420
users may run a separate document processing stage manually like this:
wenzelm@12899
  1421
"isatool usedir -D output HOL Test && isatool document Test/output";
wenzelm@11842
  1422
wenzelm@11842
  1423
* theory dependency graph may now be incorporated into documents;
wenzelm@11842
  1424
isatool usedir -g true will produce session_graph.eps/.pdf for use
wenzelm@11842
  1425
with \includegraphics of LaTeX;
wenzelm@11842
  1426
wenzelm@11864
  1427
* proper spacing of consecutive markup elements, especially text
wenzelm@11864
  1428
blocks after section headings;
wenzelm@11864
  1429
wenzelm@11572
  1430
* support bold style (for single symbols only), input syntax is like
wenzelm@11572
  1431
this: "\<^bold>\<alpha>" or "\<^bold>A";
wenzelm@11572
  1432
wenzelm@11814
  1433
* \<bullet> is now output as bold \cdot by default, which looks much
wenzelm@11572
  1434
better in printed text;
wenzelm@11572
  1435
wenzelm@11712
  1436
* added default LaTeX bindings for \<tturnstile> and \<TTurnstile>;
wenzelm@11712
  1437
note that these symbols are currently unavailable in Proof General /
wenzelm@12769
  1438
X-Symbol; new symbols \<zero>, \<one>, ..., \<nine>, and \<euro>;
wenzelm@12690
  1439
wenzelm@12690
  1440
* isatool latex no longer depends on changed TEXINPUTS, instead
wenzelm@12690
  1441
isatool document copies the Isabelle style files to the target
wenzelm@12690
  1442
location;
wenzelm@11712
  1443
wenzelm@11572
  1444
wenzelm@11633
  1445
*** Isar ***
wenzelm@11633
  1446
wenzelm@12312
  1447
* Pure/Provers: improved proof by cases and induction;
wenzelm@12280
  1448
  - 'case' command admits impromptu naming of parameters (such as
wenzelm@12280
  1449
    "case (Suc n)");
wenzelm@12280
  1450
  - 'induct' method divinates rule instantiation from the inductive
wenzelm@12280
  1451
    claim; no longer requires excessive ?P bindings for proper
wenzelm@12280
  1452
    instantiation of cases;
wenzelm@12280
  1453
  - 'induct' method properly enumerates all possibilities of set/type
wenzelm@12280
  1454
    rules; as a consequence facts may be also passed through *type*
wenzelm@12280
  1455
    rules without further ado;
wenzelm@12280
  1456
  - 'induct' method now derives symbolic cases from the *rulified*
wenzelm@12280
  1457
    rule (before it used to rulify cases stemming from the internal
wenzelm@12280
  1458
    atomized version); this means that the context of a non-atomic
wenzelm@12280
  1459
    statement becomes is included in the hypothesis, avoiding the
wenzelm@12280
  1460
    slightly cumbersome show "PROP ?case" form;
wenzelm@12280
  1461
  - 'induct' may now use elim-style induction rules without chaining
wenzelm@12280
  1462
    facts, using ``missing'' premises from the goal state; this allows
wenzelm@12280
  1463
    rules stemming from inductive sets to be applied in unstructured
wenzelm@12280
  1464
    scripts, while still benefitting from proper handling of non-atomic
wenzelm@12280
  1465
    statements; NB: major inductive premises need to be put first, all
wenzelm@12280
  1466
    the rest of the goal is passed through the induction;
wenzelm@12280
  1467
  - 'induct' proper support for mutual induction involving non-atomic
wenzelm@12280
  1468
    rule statements (uses the new concept of simultaneous goals, see
wenzelm@12280
  1469
    below);
wenzelm@12853
  1470
  - append all possible rule selections, but only use the first
wenzelm@12853
  1471
    success (no backtracking);
wenzelm@11995
  1472
  - removed obsolete "(simplified)" and "(stripped)" options of methods;
wenzelm@12754
  1473
  - undeclared rule case names default to numbers 1, 2, 3, ...;
wenzelm@12754
  1474
  - added 'print_induct_rules' (covered by help item in recent Proof
wenzelm@12754
  1475
    General versions);
wenzelm@11995
  1476
  - moved induct/cases attributes to Pure, methods to Provers;
wenzelm@11995
  1477
  - generic method setup instantiated for FOL and HOL;
wenzelm@11986
  1478
wenzelm@12163
  1479
* Pure: support multiple simultaneous goal statements, for example
wenzelm@12163
  1480
"have a: A and b: B" (same for 'theorem' etc.); being a pure
wenzelm@12163
  1481
meta-level mechanism, this acts as if several individual goals had
wenzelm@12163
  1482
been stated separately; in particular common proof methods need to be
wenzelm@12163
  1483
repeated in order to cover all claims; note that a single elimination
wenzelm@12163
  1484
step is *not* sufficient to establish the two conjunctions, so this
wenzelm@12163
  1485
fails:
wenzelm@12163
  1486
wenzelm@12163
  1487
  assume "A & B" then have A and B ..   (*".." fails*)
wenzelm@12163
  1488
wenzelm@12163
  1489
better use "obtain" in situations as above; alternative refer to
wenzelm@12163
  1490
multi-step methods like 'auto', 'simp_all', 'blast+' etc.;
wenzelm@12163
  1491
wenzelm@12078
  1492
* Pure: proper integration with ``locales''; unlike the original
webertj@15154
  1493
version by Florian Kammller, Isar locales package high-level proof
wenzelm@12078
  1494
contexts rather than raw logical ones (e.g. we admit to include
wenzelm@12280
  1495
attributes everywhere); operations on locales include merge and
wenzelm@12964
  1496
rename; support for implicit arguments (``structures''); simultaneous
wenzelm@12964
  1497
type-inference over imports and text; see also HOL/ex/Locales.thy for
wenzelm@12964
  1498
some examples;
wenzelm@12078
  1499
wenzelm@12707
  1500
* Pure: the following commands have been ``localized'', supporting a
wenzelm@12707
  1501
target locale specification "(in name)": 'lemma', 'theorem',
wenzelm@12707
  1502
'corollary', 'lemmas', 'theorems', 'declare'; the results will be
wenzelm@12707
  1503
stored both within the locale and at the theory level (exported and
wenzelm@12707
  1504
qualified by the locale name);
wenzelm@12707
  1505
wenzelm@12964
  1506
* Pure: theory goals may now be specified in ``long'' form, with
wenzelm@12964
  1507
ad-hoc contexts consisting of arbitrary locale elements. for example
wenzelm@12964
  1508
``lemma foo: fixes x assumes "A x" shows "B x"'' (local syntax and
wenzelm@12964
  1509
definitions may be given, too); the result is a meta-level rule with
wenzelm@12964
  1510
the context elements being discharged in the obvious way;
wenzelm@12964
  1511
wenzelm@12964
  1512
* Pure: new proof command 'using' allows to augment currently used
wenzelm@12964
  1513
facts after a goal statement ('using' is syntactically analogous to
wenzelm@12964
  1514
'apply', but acts on the goal's facts only); this allows chained facts
wenzelm@12964
  1515
to be separated into parts given before and after a claim, as in
wenzelm@12964
  1516
``from a and b have C using d and e <proof>'';
wenzelm@12078
  1517
wenzelm@11722
  1518
* Pure: renamed "antecedent" case to "rule_context";
wenzelm@11722
  1519
wenzelm@12964
  1520
* Pure: new 'judgment' command records explicit information about the
wenzelm@12964
  1521
object-logic embedding (used by several tools internally); no longer
wenzelm@12964
  1522
use hard-wired "Trueprop";
wenzelm@12964
  1523
wenzelm@11738
  1524
* Pure: added 'corollary' command;
wenzelm@11738
  1525
wenzelm@11722
  1526
* Pure: fixed 'token_translation' command;
wenzelm@11722
  1527
wenzelm@11899
  1528
* Pure: removed obsolete 'exported' attribute;
wenzelm@11899
  1529
wenzelm@11933
  1530
* Pure: dummy pattern "_" in is/let is now automatically lifted over
wenzelm@11933
  1531
bound variables: "ALL x. P x --> Q x" (is "ALL x. _ --> ?C x")
wenzelm@11899
  1532
supersedes more cumbersome ... (is "ALL x. _ x --> ?C x");
wenzelm@11899
  1533
wenzelm@11952
  1534
* Pure: method 'atomize' presents local goal premises as object-level
wenzelm@11952
  1535
statements (atomic meta-level propositions); setup controlled via
wenzelm@11952
  1536
rewrite rules declarations of 'atomize' attribute; example
wenzelm@11952
  1537
application: 'induct' method with proper rule statements in improper
wenzelm@11952
  1538
proof *scripts*;
wenzelm@11952
  1539
wenzelm@12106
  1540
* Pure: emulation of instantiation tactics (rule_tac, cut_tac, etc.)
wenzelm@12106
  1541
now consider the syntactic context of assumptions, giving a better
wenzelm@12106
  1542
chance to get type-inference of the arguments right (this is
wenzelm@12106
  1543
especially important for locales);
wenzelm@12106
  1544
wenzelm@12312
  1545
* Pure: "sorry" no longer requires quick_and_dirty in interactive
wenzelm@12312
  1546
mode;
wenzelm@12312
  1547
wenzelm@12405
  1548
* Pure/obtain: the formal conclusion "thesis", being marked as
wenzelm@12405
  1549
``internal'', may no longer be reference directly in the text;
wenzelm@12405
  1550
potential INCOMPATIBILITY, may need to use "?thesis" in rare
wenzelm@12405
  1551
situations;
wenzelm@12405
  1552
wenzelm@12405
  1553
* Pure: generic 'sym' attribute which declares a rule both as pure
wenzelm@12405
  1554
'elim?' and for the 'symmetric' operation;
wenzelm@12405
  1555
wenzelm@12877
  1556
* Pure: marginal comments ``--'' may now occur just anywhere in the
wenzelm@12877
  1557
text; the fixed correlation with particular command syntax has been
wenzelm@12877
  1558
discontinued;
wenzelm@12877
  1559
berghofe@13023
  1560
* Pure: new method 'rules' is particularly well-suited for proof
berghofe@13023
  1561
search in intuitionistic logic; a bit slower than 'blast' or 'fast',
berghofe@13023
  1562
but often produces more compact proof terms with less detours;
berghofe@13023
  1563
wenzelm@12364
  1564
* Pure/Provers/classical: simplified integration with pure rule
wenzelm@12364
  1565
attributes and methods; the classical "intro?/elim?/dest?"
wenzelm@12364
  1566
declarations coincide with the pure ones; the "rule" method no longer
wenzelm@12364
  1567
includes classically swapped intros; "intro" and "elim" methods no
wenzelm@12364
  1568
longer pick rules from the context; also got rid of ML declarations
wenzelm@12364
  1569
AddXIs/AddXEs/AddXDs; all of this has some potential for
wenzelm@12364
  1570
INCOMPATIBILITY;
wenzelm@12364
  1571
wenzelm@12405
  1572
* Provers/classical: attribute 'swapped' produces classical inversions
wenzelm@12405
  1573
of introduction rules;
wenzelm@12405
  1574
wenzelm@12364
  1575
* Provers/simplifier: 'simplified' attribute may refer to explicit
wenzelm@12364
  1576
rules instead of full simplifier context; 'iff' attribute handles
wenzelm@12364
  1577
conditional rules;
wenzelm@11936
  1578
wenzelm@11745
  1579
* HOL: 'typedef' now allows alternative names for Rep/Abs morphisms;
wenzelm@11745
  1580
wenzelm@11690
  1581
* HOL: 'recdef' now fails on unfinished automated proofs, use
wenzelm@11633
  1582
"(permissive)" option to recover old behavior;
wenzelm@11633
  1583
wenzelm@11933
  1584
* HOL: 'inductive' no longer features separate (collective) attributes
wenzelm@11933
  1585
for 'intros' (was found too confusing);
wenzelm@11933
  1586
wenzelm@12405
  1587
* HOL: properly declared induction rules less_induct and
wenzelm@12405
  1588
wf_induct_rule;
wenzelm@12405
  1589
kleing@11788
  1590
wenzelm@11474
  1591
*** HOL ***
wenzelm@11474
  1592
wenzelm@11702
  1593
* HOL: moved over to sane numeral syntax; the new policy is as
wenzelm@11702
  1594
follows:
wenzelm@11702
  1595
wenzelm@11702
  1596
  - 0 and 1 are polymorphic constants, which are defined on any
wenzelm@11702
  1597
  numeric type (nat, int, real etc.);
wenzelm@11702
  1598
wenzelm@11702
  1599
  - 2, 3, 4, ... and -1, -2, -3, ... are polymorphic numerals, based
wenzelm@11702
  1600
  binary representation internally;
wenzelm@11702
  1601
wenzelm@11702
  1602
  - type nat has special constructor Suc, and generally prefers Suc 0
wenzelm@11702
  1603
  over 1::nat and Suc (Suc 0) over 2::nat;
wenzelm@11702
  1604
wenzelm@12364
  1605
This change may cause significant problems of INCOMPATIBILITY; here
wenzelm@12364
  1606
are some hints on converting existing sources:
wenzelm@11702
  1607
wenzelm@11702
  1608
  - due to the new "num" token, "-0" and "-1" etc. are now atomic
wenzelm@11702
  1609
  entities, so expressions involving "-" (unary or binary minus) need
wenzelm@11702
  1610
  to be spaced properly;
wenzelm@11702
  1611
wenzelm@11702
  1612
  - existing occurrences of "1" may need to be constraint "1::nat" or
wenzelm@11702
  1613
  even replaced by Suc 0; similar for old "2";
wenzelm@11702
  1614
wenzelm@11702
  1615
  - replace "#nnn" by "nnn", and "#-nnn" by "-nnn";
wenzelm@11702
  1616
wenzelm@11702
  1617
  - remove all special provisions on numerals in proofs;
wenzelm@11702
  1618
wenzelm@13042
  1619
* HOL: simp rules nat_number expand numerals on nat to Suc/0
wenzelm@12837
  1620
representation (depends on bin_arith_simps in the default context);
wenzelm@12837
  1621
wenzelm@12736
  1622
* HOL: symbolic syntax for x^2 (numeral 2);
wenzelm@12736
  1623
wenzelm@12335
  1624
* HOL: the class of all HOL types is now called "type" rather than
wenzelm@12335
  1625
"term"; INCOMPATIBILITY, need to adapt references to this type class
wenzelm@12335
  1626
in axclass/classes, instance/arities, and (usually rare) occurrences
wenzelm@12335
  1627
in typings (of consts etc.); internally the class is called
wenzelm@12335
  1628
"HOL.type", ML programs should refer to HOLogic.typeS;
wenzelm@12335
  1629
wenzelm@12280
  1630
* HOL/record package improvements:
wenzelm@12280
  1631
  - new derived operations "fields" to build a partial record section,
wenzelm@12280
  1632
    "extend" to promote a fixed record to a record scheme, and
wenzelm@12280
  1633
    "truncate" for the reverse; cf. theorems "xxx.defs", which are *not*
wenzelm@12280
  1634
    declared as simp by default;
wenzelm@12587
  1635
  - shared operations ("more", "fields", etc.) now need to be always
wenzelm@12587
  1636
    qualified) --- potential INCOMPATIBILITY;
wenzelm@12280
  1637
  - removed "make_scheme" operations (use "make" with "extend") --
wenzelm@12280
  1638
    INCOMPATIBILITY;
wenzelm@11937
  1639
  - removed "more" class (simply use "term") -- INCOMPATIBILITY;
wenzelm@12253
  1640
  - provides cases/induct rules for use with corresponding Isar
wenzelm@12253
  1641
    methods (for concrete records, record schemes, concrete more
wenzelm@12280
  1642
    parts, and schematic more parts -- in that order);
wenzelm@11930
  1643
  - internal definitions directly based on a light-weight abstract
wenzelm@11930
  1644
    theory of product types over typedef rather than datatype;
wenzelm@11930
  1645
berghofe@13023
  1646
* HOL: generic code generator for generating executable ML code from
berghofe@13023
  1647
specifications; specific support for HOL constructs such as inductive
berghofe@13023
  1648
datatypes and sets, as well as recursive functions; can be invoked
berghofe@13023
  1649
via 'generate_code' theory section;
berghofe@13023
  1650
wenzelm@11933
  1651
* HOL: canonical cases/induct rules for n-tuples (n = 3..7);
wenzelm@11933
  1652
paulson@13824
  1653
* HOL: consolidated and renamed several theories.  In particular:
wenzelm@14731
  1654
        Ord.thy has been absorbed into HOL.thy
wenzelm@14731
  1655
        String.thy has been absorbed into List.thy
wenzelm@14731
  1656
wenzelm@11802
  1657
* HOL: concrete setsum syntax "\<Sum>i:A. b" == "setsum (%i. b) A"
wenzelm@11802
  1658
(beware of argument permutation!);
wenzelm@11802
  1659
wenzelm@11657
  1660
* HOL: linorder_less_split superseded by linorder_cases;
wenzelm@11657
  1661
wenzelm@12917
  1662
* HOL/List: "nodups" renamed to "distinct";
nipkow@12889
  1663
wenzelm@11633
  1664
* HOL: added "The" definite description operator; move Hilbert's "Eps"
paulson@13824
  1665
to peripheral theory "Hilbert_Choice"; some INCOMPATIBILITIES:
paulson@13824
  1666
  - Ex_def has changed, now need to use some_eq_ex
wenzelm@11437
  1667
wenzelm@11572
  1668
* HOL: made split_all_tac safe; EXISTING PROOFS MAY FAIL OR LOOP, so
wenzelm@11572
  1669
in this (rare) case use:
wenzelm@11572
  1670
wenzelm@11572
  1671
  delSWrapper "split_all_tac"
wenzelm@11572
  1672
  addSbefore ("unsafe_split_all_tac", unsafe_split_all_tac)
wenzelm@11572
  1673
wenzelm@11572
  1674
* HOL: added safe wrapper "split_conv_tac" to claset; EXISTING PROOFS
wenzelm@11474
  1675
MAY FAIL;
nipkow@11361
  1676
wenzelm@11572
  1677
* HOL: introduced f^n = f o ... o f; warning: due to the limits of
wenzelm@11572
  1678
Isabelle's type classes, ^ on functions and relations has too general
wenzelm@11572
  1679
a domain, namely ('a * 'b) set and 'a => 'b; this means that it may be
wenzelm@11572
  1680
necessary to attach explicit type constraints;
nipkow@11307
  1681
wenzelm@12917
  1682
* HOL/Relation: the prefix name of the infix "O" has been changed from
wenzelm@12917
  1683
"comp" to "rel_comp"; INCOMPATIBILITY: a few theorems have been
wenzelm@12917
  1684
renamed accordingly (eg "compI" -> "rel_compI").
nipkow@12489
  1685
wenzelm@11487
  1686
* HOL: syntax translations now work properly with numerals and records
wenzelm@11487
  1687
expressions;
wenzelm@11474
  1688
wenzelm@12457
  1689
* HOL: bounded abstraction now uses syntax "%" / "\<lambda>" instead
wenzelm@12457
  1690
of "lam" -- INCOMPATIBILITY;
wenzelm@11474
  1691
wenzelm@11933
  1692
* HOL: got rid of some global declarations (potential INCOMPATIBILITY
wenzelm@11933
  1693
for ML tools): const "()" renamed "Product_Type.Unity", type "unit"
wenzelm@11933
  1694
renamed "Product_Type.unit";
wenzelm@11611
  1695
nipkow@12564
  1696
* HOL: renamed rtrancl_into_rtrancl2 to converse_rtrancl_into_rtrancl
nipkow@12564
  1697
wenzelm@12924
  1698
* HOL: removed obsolete theorem "optionE" (use "option.exhaust", or
wenzelm@12924
  1699
the "cases" method);
wenzelm@12924
  1700
wenzelm@12597
  1701
* HOL/GroupTheory: group theory examples including Sylow's theorem (by
webertj@15154
  1702
Florian Kammller);
wenzelm@12597
  1703
wenzelm@12608
  1704
* HOL/IMP: updated and converted to new-style theory format; several
wenzelm@12608
  1705
parts turned into readable document, with proper Isar proof texts and
wenzelm@12608
  1706
some explanations (by Gerwin Klein);
wenzelm@12597
  1707
wenzelm@12734
  1708
* HOL-Real: added Complex_Numbers (by Gertrud Bauer);
wenzelm@12734
  1709
wenzelm@12690
  1710
* HOL-Hyperreal is now a logic image;
wenzelm@12690
  1711
wenzelm@11611
  1712
wenzelm@12022
  1713
*** HOLCF ***
wenzelm@12022
  1714
wenzelm@12622
  1715
* Isar: consts/constdefs supports mixfix syntax for continuous
wenzelm@12622
  1716
operations;
wenzelm@12622
  1717
wenzelm@12622
  1718
* Isar: domain package adapted to new-style theory format, e.g. see
wenzelm@12622
  1719
HOLCF/ex/Dnat.thy;
wenzelm@12622
  1720
wenzelm@12622
  1721
* theory Lift: proper use of rep_datatype lift instead of ML hacks --
wenzelm@12280
  1722
potential INCOMPATIBILITY; now use plain induct_tac instead of former
wenzelm@12280
  1723
lift.induct_tac, always use UU instead of Undef;
wenzelm@12022
  1724
wenzelm@12597
  1725
* HOLCF/IMP: updated and converted to new-style theory;
wenzelm@12597
  1726
wenzelm@12022
  1727
wenzelm@11474
  1728
*** ZF ***
wenzelm@11474
  1729
wenzelm@12622
  1730
* Isar: proper integration of logic-specific tools and packages,
wenzelm@12622
  1731
including theory commands '(co)inductive', '(co)datatype',
wenzelm@12622
  1732
'rep_datatype', 'inductive_cases', as well as methods 'ind_cases',
wenzelm@12622
  1733
'induct_tac', 'case_tac', and 'typecheck' (with attribute 'TC');
wenzelm@12622
  1734
wenzelm@12622
  1735
* theory Main no longer includes AC; for the Axiom of Choice, base
wenzelm@12622
  1736
your theory on Main_ZFC;
wenzelm@12622
  1737
wenzelm@12622
  1738
* the integer library now covers quotients and remainders, with many
wenzelm@12622
  1739
laws relating division to addition, multiplication, etc.;
paulson@12563
  1740
wenzelm@12280
  1741
* ZF/UNITY: Chandy and Misra's UNITY is now available in ZF, giving a
wenzelm@12280
  1742
typeless version of the formalism;
wenzelm@12280
  1743
wenzelm@13025
  1744
* ZF/AC, Coind, IMP, Resid: updated and converted to new-style theory
wenzelm@13025
  1745
format;
wenzelm@12608
  1746
wenzelm@12280
  1747
* ZF/Induct: new directory for examples of inductive definitions,
wenzelm@12608
  1748
including theory Multiset for multiset orderings; converted to
wenzelm@12608
  1749
new-style theory format;
wenzelm@12177
  1750
wenzelm@13025
  1751
* ZF: many new theorems about lists, ordinals, etc.;
paulson@12850
  1752
wenzelm@11474
  1753
wenzelm@11474
  1754
*** General ***
wenzelm@11474
  1755
wenzelm@12280
  1756
* Pure/kernel: meta-level proof terms (by Stefan Berghofer); reference
wenzelm@12280
  1757
variable proof controls level of detail: 0 = no proofs (only oracle
wenzelm@12280
  1758
dependencies), 1 = lemma dependencies, 2 = compact proof terms; see
wenzelm@12280
  1759
also ref manual for further ML interfaces;
wenzelm@12280
  1760
wenzelm@12280
  1761
* Pure/axclass: removed obsolete ML interface
wenzelm@12280
  1762
goal_subclass/goal_arity;
wenzelm@12280
  1763
wenzelm@12280
  1764
* Pure/syntax: new token syntax "num" for plain numerals (without "#"
wenzelm@12280
  1765
of "xnum"); potential INCOMPATIBILITY, since -0, -1 etc. are now
wenzelm@12280
  1766
separate tokens, so expressions involving minus need to be spaced
wenzelm@12280
  1767
properly;
wenzelm@12280
  1768
wenzelm@12312
  1769
* Pure/syntax: support non-oriented infixes, using keyword "infix"
wenzelm@12312
  1770
rather than "infixl" or "infixr";
wenzelm@12312
  1771
wenzelm@12312
  1772
* Pure/syntax: concrete syntax for dummy type variables admits genuine
wenzelm@12312
  1773
sort constraint specifications in type inference; e.g. "x::_::foo"
wenzelm@12312
  1774
ensures that the type of "x" is of sort "foo" (but not necessarily a
wenzelm@12312
  1775
type variable);
wenzelm@12280
  1776
wenzelm@12280
  1777
* Pure/syntax: print modes "type_brackets" and "no_type_brackets"
wenzelm@12280
  1778
control output of nested => (types); the default behavior is
wenzelm@12280
  1779
"type_brackets";
wenzelm@12280
  1780
wenzelm@12280
  1781
* Pure/syntax: builtin parse translation for "_constify" turns valued
wenzelm@11817
  1782
tokens into AST constants;
wenzelm@11474
  1783
wenzelm@12280
  1784
* Pure/syntax: prefer later declarations of translations and print
wenzelm@12280
  1785
translation functions; potential INCOMPATIBILITY: need to reverse
wenzelm@12280
  1786
multiple declarations for same syntax element constant;
wenzelm@12280
  1787
wenzelm@12832
  1788
* Pure/show_hyps reset by default (in accordance to existing Isar
wenzelm@12832
  1789
practice);
wenzelm@12832
  1790
wenzelm@12280
  1791
* Provers/classical: renamed addaltern to addafter, addSaltern to
wenzelm@12280
  1792
addSafter;
wenzelm@12280
  1793
wenzelm@12280
  1794
* Provers/clasimp: ``iff'' declarations now handle conditional rules
wenzelm@12280
  1795
as well;
wenzelm@12253
  1796
wenzelm@12538
  1797
* system: tested support for MacOS X; should be able to get Isabelle +
wenzelm@12538
  1798
Proof General to work in a plain Terminal after installing Poly/ML
wenzelm@12538
  1799
(e.g. from the Isabelle distribution area) and GNU bash alone
wenzelm@12538
  1800
(e.g. from http://www.apple.com); full X11, XEmacs and X-Symbol
wenzelm@12538
  1801
support requires further installations, e.g. from
wenzelm@12538
  1802
http://fink.sourceforge.net/);
wenzelm@12538
  1803
wenzelm@12280
  1804
* system: support Poly/ML 4.1.1 (able to manage larger heaps);
wenzelm@11551
  1805
wenzelm@12753
  1806
* system: reduced base memory usage by Poly/ML (approx. 20 MB instead
wenzelm@12753
  1807
of 40 MB), cf. ML_OPTIONS;
wenzelm@12753
  1808
wenzelm@11633
  1809
* system: Proof General keywords specification is now part of the
wenzelm@11633
  1810
Isabelle distribution (see etc/isar-keywords.el);
wenzelm@11633
  1811
wenzelm@12728
  1812
* system: support for persistent Proof General sessions (refrain from
wenzelm@12728
  1813
outdating all loaded theories on startup); user may create writable
wenzelm@12728
  1814
logic images like this: ``isabelle -q HOL Test'';
wenzelm@12597
  1815
wenzelm@11551
  1816
* system: smart selection of Isabelle process versus Isabelle
wenzelm@11572
  1817
interface, accommodates case-insensitive file systems (e.g. HFS+); may
wenzelm@11572
  1818
run both "isabelle" and "Isabelle" even if file names are badly
wenzelm@11572
  1819
damaged (executable inspects the case of the first letter of its own
wenzelm@11572
  1820
name); added separate "isabelle-process" and "isabelle-interface";
wenzelm@11551
  1821
wenzelm@12472
  1822
* system: refrain from any attempt at filtering input streams; no
wenzelm@12472
  1823
longer support ``8bit'' encoding of old isabelle font, instead proper
wenzelm@12472
  1824
iso-latin characters may now be used; the related isatools
wenzelm@12472
  1825
"symbolinput" and "nonascii" have disappeared as well;
wenzelm@12472
  1826
wenzelm@12472
  1827
* system: removed old "xterm" interface (the print modes "xterm" and
wenzelm@12472
  1828
"xterm_color" are still available for direct use in a suitable
wenzelm@12472
  1829
terminal);
wenzelm@12472
  1830
paulson@11314
  1831
oheimb@11169
  1832
wenzelm@11062
  1833
New in Isabelle99-2 (February 2001)
wenzelm@11062
  1834
-----------------------------------
wenzelm@11062
  1835
nipkow@10224
  1836
*** Overview of INCOMPATIBILITIES ***
nipkow@10224
  1837
paulson@11241
  1838
* HOL: please note that theories in the Library and elsewhere often use the
paulson@11241
  1839
new-style (Isar) format; to refer to their theorems in an ML script you must
wenzelm@12622
  1840
bind them to ML identifers by e.g.      val thm_name = thm "thm_name";
paulson@11241
  1841
wenzelm@11043
  1842
* HOL: inductive package no longer splits induction rule aggressively,
wenzelm@11043
  1843
but only as far as specified by the introductions given; the old
oheimb@11130
  1844
format may be recovered via ML function complete_split_rule or attribute
wenzelm@11043
  1845
'split_rule (complete)';
wenzelm@11043
  1846
wenzelm@10998
  1847
* HOL: induct renamed to lfp_induct, lfp_Tarski to lfp_unfold,
wenzelm@10998
  1848
gfp_Tarski to gfp_unfold;
nipkow@10224
  1849
paulson@10288
  1850
* HOL: contrapos, contrapos2 renamed to contrapos_nn, contrapos_pp;
paulson@10288
  1851
wenzelm@10858
  1852
* HOL: infix "dvd" now has priority 50 rather than 70 (because it is a
wenzelm@10858
  1853
relation); infix "^^" has been renamed "``"; infix "``" has been
wenzelm@10858
  1854
renamed "`"; "univalent" has been renamed "single_valued";
nipkow@10793
  1855
wenzelm@10998
  1856
* HOL/Real: "rinv" and "hrinv" replaced by overloaded "inverse"
wenzelm@10998
  1857
operation;
wenzelm@10998
  1858
nipkow@10868
  1859
* HOLCF: infix "`" has been renamed "$"; the symbol syntax is \<cdot>;
nipkow@10856
  1860
wenzelm@10391
  1861
* Isar: 'obtain' no longer declares "that" fact as simp/intro;
wenzelm@10391
  1862
wenzelm@10401
  1863
* Isar/HOL: method 'induct' now handles non-atomic goals; as a
wenzelm@10401
  1864
consequence, it is no longer monotonic wrt. the local goal context
wenzelm@10401
  1865
(which is now passed through the inductive cases);
wenzelm@10401
  1866
wenzelm@10976
  1867
* Document preparation: renamed standard symbols \<ll> to \<lless> and
wenzelm@10976
  1868
\<gg> to \<ggreater>;
wenzelm@10976
  1869
nipkow@10224
  1870
wenzelm@10245
  1871
*** Document preparation ***
wenzelm@10245
  1872
wenzelm@10858
  1873
* \isabellestyle{NAME} selects version of Isabelle output (currently
wenzelm@10858
  1874
available: are "it" for near math-mode best-style output, "sl" for
wenzelm@10858
  1875
slanted text style, and "tt" for plain type-writer; if no
wenzelm@10858
  1876
\isabellestyle command is given, output is according to slanted
wenzelm@10858
  1877
type-writer);
wenzelm@10858
  1878
wenzelm@10322
  1879
* support sub/super scripts (for single symbols only), input syntax is
wenzelm@10322
  1880
like this: "A\<^sup>*" or "A\<^sup>\<star>";
wenzelm@10322
  1881
wenzelm@10858
  1882
* some more standard symbols; see Appendix A of the system manual for
wenzelm@11062
  1883
the complete list of symbols defined in isabellesym.sty;
wenzelm@10858
  1884
wenzelm@10998
  1885
* improved isabelle style files; more abstract symbol implementation
wenzelm@10998
  1886
(should now use \isamath{...} and \isatext{...} in custom symbol
wenzelm@10998
  1887
definitions);
wenzelm@10998
  1888
wenzelm@10634
  1889
* antiquotation @{goals} and @{subgoals} for output of *dynamic* goals
wenzelm@10634
  1890
state; Note that presentation of goal states does not conform to
wenzelm@10634
  1891
actual human-readable proof documents.  Please do not include goal
wenzelm@10634
  1892
states into document output unless you really know what you are doing!
wenzelm@10322
  1893
wenzelm@11062
  1894
* proper indentation of antiquoted output with proportional LaTeX
wenzelm@11062
  1895
fonts;
wenzelm@10862
  1896
wenzelm@11050
  1897
* no_document ML operator temporarily disables LaTeX document
wenzelm@11050
  1898
generation;
wenzelm@11050
  1899
wenzelm@11062
  1900
* isatool unsymbolize tunes sources for plain ASCII communication;
wenzelm@11062
  1901
wenzelm@10322
  1902
wenzelm@10306
  1903
*** Isar ***
wenzelm@10306
  1904
wenzelm@10547
  1905
* Pure: Isar now suffers initial goal statements to contain unbound
wenzelm@10547
  1906
schematic variables (this does not conform to actual readable proof
wenzelm@10547
  1907
documents, due to unpredictable outcome and non-compositional proof
wenzelm@10547
  1908
checking); users who know what they are doing may use schematic goals
wenzelm@10547
  1909
for Prolog-style synthesis of proven results;
wenzelm@10547
  1910
wenzelm@10391
  1911
* Pure: assumption method (an implicit finishing) now handles actual
wenzelm@10391
  1912
rules as well;
wenzelm@10391
  1913
wenzelm@10391
  1914
* Pure: improved 'obtain' --- moved to Pure, insert "that" into
wenzelm@10391
  1915
initial goal, declare "that" only as Pure intro (only for single
wenzelm@10391
  1916
steps); the "that" rule assumption may now be involved in implicit
wenzelm@10391
  1917
finishing, thus ".." becomes a feasible for trivial obtains;
wenzelm@10391
  1918
wenzelm@10391
  1919
* Pure: default proof step now includes 'intro_classes'; thus trivial
wenzelm@10391
  1920
instance proofs may be performed by "..";
wenzelm@10391
  1921
wenzelm@10391
  1922
* Pure: ?thesis / ?this / "..." now work for pure meta-level
wenzelm@10391
  1923
statements as well;
wenzelm@10306
  1924
wenzelm@11097
  1925
* Pure: more robust selection of calculational rules;
wenzelm@11097
  1926
wenzelm@10858
  1927
* Pure: the builtin notion of 'finished' goal now includes the ==-refl
wenzelm@10858
  1928
rule (as well as the assumption rule);
wenzelm@10858
  1929
wenzelm@10858
  1930
* Pure: 'thm_deps' command visualizes dependencies of theorems and
wenzelm@10858
  1931
lemmas, using the graph browser tool;
wenzelm@10858
  1932
wenzelm@10944
  1933
* Pure: predict failure of "show" in interactive mode;
wenzelm@10944
  1934
wenzelm@11016
  1935
* Pure: 'thms_containing' now takes actual terms as arguments;
wenzelm@11016
  1936
wenzelm@10401
  1937
* HOL: improved method 'induct' --- now handles non-atomic goals
wenzelm@10401
  1938
(potential INCOMPATIBILITY); tuned error handling;
wenzelm@10401
  1939
wenzelm@10557
  1940
* HOL: cases and induct rules now provide explicit hints about the
wenzelm@10547
  1941
number of facts to be consumed (0 for "type" and 1 for "set" rules);
wenzelm@10547
  1942
any remaining facts are inserted into the goal verbatim;
wenzelm@10547
  1943
wenzelm@10858
  1944
* HOL: local contexts (aka cases) may now contain term bindings as
wenzelm@10858
  1945
well; the 'cases' and 'induct' methods new provide a ?case binding for
wenzelm@10858
  1946
the result to be shown in each case;
wenzelm@10858
  1947
wenzelm@10770
  1948
* HOL: added 'recdef_tc' command;
wenzelm@10770
  1949
wenzelm@11016
  1950
* isatool convert assists in eliminating legacy ML scripts;
wenzelm@11016
  1951
wenzelm@10306
  1952
wenzelm@10245
  1953
*** HOL ***
wenzelm@10245
  1954
wenzelm@10245
  1955
* HOL/Library: a collection of generic theories to be used together
wenzelm@10245
  1956
with main HOL; the theory loader path already includes this directory
wenzelm@10245
  1957
by default; the following existing theories have been moved here:
wenzelm@10245
  1958
HOL/Induct/Multiset, HOL/Induct/Acc (as Accessible_Part), HOL/While
wenzelm@10337
  1959
(as While_Combinator), HOL/Lex/Prefix (as List_Prefix);
wenzelm@10245
  1960
wenzelm@10966
  1961
* HOL/Unix: "Some aspects of Unix file-system security", a typical
wenzelm@10966
  1962
modelling and verification task performed in Isabelle/HOL +
wenzelm@10966
  1963
Isabelle/Isar + Isabelle document preparation (by Markus Wenzel).
wenzelm@10966
  1964
wenzelm@11094
  1965
* HOL/Algebra: special summation operator SUM no longer exists, it has
wenzelm@11094
  1966
been replaced by setsum; infix 'assoc' now has priority 50 (like
wenzelm@11094
  1967
'dvd'); axiom 'one_not_zero' has been moved from axclass 'ring' to
wenzelm@11094
  1968
'domain', this makes the theory consistent with mathematical
wenzelm@11094
  1969
literature;
wenzelm@11094
  1970
wenzelm@10514
  1971
* HOL basics: added overloaded operations "inverse" and "divide"
wenzelm@10726
  1972
(infix "/"), syntax for generic "abs" operation, generic summation
wenzelm@11094
  1973
operator \<Sum>;
wenzelm@10452
  1974
wenzelm@10391
  1975
* HOL/typedef: simplified package, provide more useful rules (see also
wenzelm@10391
  1976
HOL/subset.thy);
wenzelm@10391
  1977
wenzelm@10915
  1978
* HOL/datatype: induction rule for arbitrarily branching datatypes is
wenzelm@10915
  1979
now expressed as a proper nested rule (old-style tactic scripts may
wenzelm@10915
  1980
require atomize_strip_tac to cope with non-atomic premises);
wenzelm@10915
  1981
wenzelm@10915
  1982
* HOL: renamed theory "Prod" to "Product_Type", renamed "split" rule
wenzelm@10915
  1983
to "split_conv" (old name still available for compatibility);
wenzelm@10915
  1984
wenzelm@10915
  1985
* HOL: improved concrete syntax for strings (e.g. allows translation
wenzelm@10915
  1986
rules with string literals);
wenzelm@10915
  1987
paulson@12245
  1988
* HOL-Real-Hyperreal: this extends HOL-Real with the hyperreals
paulson@12245
  1989
 and Fleuriot's mechanization of analysis, including the transcendental
paulson@12245
  1990
 functions for the reals;
paulson@10756
  1991
wenzelm@11094
  1992
* HOL/Real, HOL/Hyperreal: improved arithmetic simplification;
wenzelm@10391
  1993
wenzelm@10858
  1994
paulson@10474
  1995
*** CTT ***
paulson@10474
  1996
wenzelm@10547
  1997
* CTT: x-symbol support for Pi, Sigma, -->, : (membership); note that
wenzelm@10547
  1998
"lam" is displayed as TWO lambda-symbols
paulson@10474
  1999
wenzelm@10547
  2000
* CTT: theory Main now available, containing everything (that is, Bool
wenzelm@10547
  2001
and Arith);
wenzelm@10547
  2002
paulson@10474
  2003
wenzelm@10391
  2004
*** General ***
wenzelm@10391
  2005
wenzelm@10547
  2006
* Pure: the Simplifier has been implemented properly as a derived rule
wenzelm@10547
  2007
outside of the actual kernel (at last!); the overall performance
wenzelm@10547
  2008
penalty in practical applications is about 50%, while reliability of
wenzelm@10547
  2009
the Isabelle inference kernel has been greatly improved;
wenzelm@10547
  2010
wenzelm@11112
  2011
* print modes "brackets" and "no_brackets" control output of nested =>
wenzelm@11112
  2012
(types) and ==> (props); the default behaviour is "brackets";
wenzelm@11112
  2013
wenzelm@10391
  2014
* Provers: fast_tac (and friends) now handle actual object-logic rules
wenzelm@10391
  2015
as assumptions as well;
wenzelm@10391
  2016
wenzelm@11124
  2017
* system: support Poly/ML 4.0;
wenzelm@11124
  2018
wenzelm@11124
  2019
* system: isatool install handles KDE version 1 or 2;
wenzelm@11124
  2020
wenzelm@10391
  2021
wenzelm@10245
  2022
wenzelm@10103
  2023
New in Isabelle99-1 (October 2000)
wenzelm@10103
  2024
----------------------------------
wenzelm@8015
  2025
wenzelm@10003
  2026
*** Overview of INCOMPATIBILITIES ***
paulson@8014
  2027
wenzelm@8848
  2028
* HOL: simplification of natural numbers is much changed; to partly
wenzelm@8848
  2029
recover the old behaviour (e.g. to prevent n+n rewriting to #2*n)
wenzelm@8848
  2030
issue the following ML commands:
wenzelm@8848
  2031
wenzelm@8848
  2032
  Delsimprocs Nat_Numeral_Simprocs.cancel_numerals;
wenzelm@8848
  2033
  Delsimprocs [Nat_Numeral_Simprocs.combine_numerals];
paulson@8788
  2034
wenzelm@10129
  2035
* HOL: simplification no longer dives into case-expressions; this is
wenzelm@10129
  2036
controlled by "t.weak_case_cong" for each datatype t;
wenzelm@10003
  2037
wenzelm@10003
  2038
* HOL: nat_less_induct renamed to less_induct;
wenzelm@10003
  2039
wenzelm@10003
  2040
* HOL: systematic renaming of the SOME (Eps) rules, may use isatool
wenzelm@10003
  2041
fixsome to patch .thy and .ML sources automatically;
paulson@8967
  2042
wenzelm@10003
  2043
  select_equality  -> some_equality
wenzelm@10003
  2044
  select_eq_Ex     -> some_eq_ex
wenzelm@10003
  2045
  selectI2EX       -> someI2_ex
wenzelm@10003
  2046
  selectI2         -> someI2
wenzelm@10003
  2047
  selectI          -> someI
wenzelm@10003
  2048
  select1_equality -> some1_equality
wenzelm@10003
  2049
  Eps_sym_eq       -> some_sym_eq_trivial
wenzelm@10003
  2050
  Eps_eq           -> some_eq_trivial
wenzelm@10003
  2051
wenzelm@10003
  2052
* HOL: exhaust_tac on datatypes superceded by new generic case_tac;
wenzelm@10003
  2053
wenzelm@10003
  2054
* HOL: removed obsolete theorem binding expand_if (refer to split_if
wenzelm@10003
  2055
instead);
wenzelm@10003
  2056
wenzelm@10003
  2057
* HOL: the recursion equations generated by 'recdef' are now called
wenzelm@10003
  2058
f.simps instead of f.rules;
wenzelm@10003
  2059
wenzelm@10003
  2060
* HOL: qed_spec_mp now also handles bounded ALL as well;
wenzelm@10003
  2061
wenzelm@10003
  2062
* HOL: 0 is now overloaded, so the type constraint ":: nat" may
wenzelm@10003
  2063
sometimes be needed;
wenzelm@10003
  2064
wenzelm@10003
  2065
* HOL: the constant for "f``x" is now "image" rather than "op ``";
paulson@8014
  2066
paulson@10065
  2067
* HOL: the constant for "f-``x" is now "vimage" rather than "op -``";
paulson@10065
  2068
wenzelm@9330
  2069
* HOL: the disjoint sum is now "<+>" instead of "Plus"; the cartesian
wenzelm@9330
  2070
product is now "<*>" instead of "Times"; the lexicographic product is
wenzelm@9330
  2071
now "<*lex*>" instead of "**";
nipkow@8705
  2072
wenzelm@10003
  2073
* HOL: theory Sexp is now in HOL/Induct examples (it used to be part
wenzelm@10003
  2074
of main HOL, but was unused); better use HOL's datatype package;
paulson@9971
  2075
wenzelm@10137
  2076
* HOL: removed "symbols" syntax for constant "override" of theory Map;
wenzelm@10137
  2077
the old syntax may be recovered as follows:
wenzelm@10137
  2078
wenzelm@10137
  2079
  syntax (symbols)
wenzelm@10137
  2080
    override  :: "('a ~=> 'b) => ('a ~=> 'b) => ('a ~=> 'b)"
wenzelm@10137
  2081
      (infixl "\\<oplus>" 100)
wenzelm@10137
  2082
wenzelm@8848
  2083
* HOL/Real: "rabs" replaced by overloaded "abs" function;
wenzelm@8848
  2084
wenzelm@8887
  2085
* HOL/ML: even fewer consts are declared as global (see theories Ord,
wenzelm@8887
  2086
Lfp, Gfp, WF); this only affects ML packages that refer to const names
wenzelm@8887
  2087
internally;
wenzelm@8887
  2088
wenzelm@10003
  2089
* HOL and ZF: syntax for quotienting wrt an equivalence relation
wenzelm@10003
  2090
changed from A/r to A//r;
wenzelm@9908
  2091
wenzelm@10003
  2092
* ZF: new treatment of arithmetic (nat & int) may break some old
wenzelm@10003
  2093
proofs;
wenzelm@8921
  2094
wenzelm@10003
  2095
* Isar: renamed some attributes (RS -> THEN, simplify -> simplified,
wenzelm@10003
  2096
rulify -> rule_format, elimify -> elim_format, ...);
paulson@9542
  2097
wenzelm@9941
  2098
* Isar/Provers: intro/elim/dest attributes changed; renamed
wenzelm@9941
  2099
intro/intro!/intro!! flags to intro!/intro/intro? (in most cases, one
wenzelm@9937
  2100
should have to change intro!! to intro? only); replaced "delrule" by
wenzelm@9937
  2101
"rule del";
wenzelm@9437
  2102
wenzelm@9612
  2103
* Isar/HOL: renamed "intrs" to "intros" in inductive definitions;
wenzelm@9612
  2104
wenzelm@9437
  2105
* Provers: strengthened force_tac by using new first_best_tac;
oheimb@9402
  2106
wenzelm@10003
  2107
* LaTeX document preparation: several changes of isabelle.sty (see
wenzelm@10003
  2108
lib/texinputs);
wenzelm@8729
  2109
paulson@8014
  2110
wenzelm@8487
  2111
*** Document preparation ***
wenzelm@8358
  2112
wenzelm@9198
  2113
* formal comments (text blocks etc.) in new-style theories may now
wenzelm@9753
  2114
contain antiquotations of thm/prop/term/typ/text to be presented
wenzelm@9753
  2115
according to latex print mode; concrete syntax is like this:
wenzelm@9753
  2116
@{term[show_types] "f(x) = a + x"};
wenzelm@9198
  2117
wenzelm@8358
  2118
* isatool mkdir provides easy setup of Isabelle session directories,
wenzelm@8518
  2119
including proper document sources;
wenzelm@8358
  2120
wenzelm@8358
  2121
* generated LaTeX sources are now deleted after successful run
wenzelm@8358
  2122
(isatool document -c); may retain a copy somewhere else via -D option
wenzelm@8358
  2123
of isatool usedir;
wenzelm@8358
  2124
wenzelm@8566
  2125
* isatool usedir -D now lets isatool latex -o sty update the Isabelle
wenzelm@10003
  2126
style files, achieving self-contained LaTeX sources and simplifying
wenzelm@10003
  2127
LaTeX debugging;
wenzelm@8566
  2128
wenzelm@8518
  2129
* old-style theories now produce (crude) LaTeX output as well;
wenzelm@8358
  2130
wenzelm@9057
  2131
* browser info session directories are now self-contained (may be put
wenzelm@9437
  2132
on WWW server seperately); improved graphs of nested sessions; removed
wenzelm@9437
  2133
graph for 'all sessions';
wenzelm@9057
  2134
wenzelm@10003
  2135
* several improvements in isabelle style files; \isabellestyle{it}
wenzelm@10003
  2136
produces fake math mode output; \isamarkupheader is now \section by
wenzelm@10003
  2137
default; see lib/texinputs/isabelle.sty etc.;
wenzelm@9489
  2138
wenzelm@8358
  2139
wenzelm@8184
  2140
*** Isar ***
wenzelm@8184
  2141
wenzelm@10003
  2142
* Isar/Pure: local results and corresponding term bindings are now
wenzelm@10003
  2143
subject to Hindley-Milner polymorphism (similar to ML); this
wenzelm@10003
  2144
accommodates incremental type-inference very nicely;
wenzelm@8283
  2145
wenzelm@10003
  2146
* Isar/Pure: new derived language element 'obtain' supports
wenzelm@10003
  2147
generalized existence reasoning;
wenzelm@8621
  2148
wenzelm@10003
  2149
* Isar/Pure: new calculational elements 'moreover' and 'ultimately'
wenzelm@10003
  2150
support accumulation of results, without applying any rules yet;
wenzelm@10003
  2151
useful to collect intermediate results without explicit name
wenzelm@10003
  2152
references, and for use with transitivity rules with more than 2
wenzelm@10003
  2153
premises;
wenzelm@8184
  2154
wenzelm@10003
  2155
* Isar/Pure: scalable support for case-analysis type proofs: new
wenzelm@10003
  2156
'case' language element refers to local contexts symbolically, as
wenzelm@10003
  2157
produced by certain proof methods; internally, case names are attached
wenzelm@10003
  2158
to theorems as "tags";
wenzelm@8440
  2159
wenzelm@10003
  2160
* Isar/Pure: theory command 'hide' removes declarations from
wenzelm@9330
  2161
class/type/const name spaces;
wenzelm@9330
  2162
wenzelm@10003
  2163
* Isar/Pure: theory command 'defs' supports option "(overloaded)" to
wenzelm@9330
  2164
indicate potential overloading;
wenzelm@9330
  2165
wenzelm@10003
  2166
* Isar/Pure: changed syntax of local blocks from {{ }} to { };
wenzelm@8621
  2167
wenzelm@10003
  2168
* Isar/Pure: syntax of sorts made 'inner', i.e. have to write
wenzelm@10003
  2169
"{a,b,c}" instead of {a,b,c};
wenzelm@9011
  2170
wenzelm@10003
  2171
* Isar/Pure now provides its own version of intro/elim/dest
wenzelm@10003
  2172
attributes; useful for building new logics, but beware of confusion
wenzelm@10003
  2173
with the version in Provers/classical;
wenzelm@9612
  2174
wenzelm@10003
  2175
* Isar/Pure: the local context of (non-atomic) goals is provided via
wenzelm@10003
  2176
case name 'antecedent';
wenzelm@8440
  2177
wenzelm@10003
  2178
* Isar/Pure: removed obsolete 'transfer' attribute (transfer of thms
wenzelm@10003
  2179
to the current context is now done automatically);
wenzelm@9383
  2180
wenzelm@10003
  2181
* Isar/Pure: theory command 'method_setup' provides a simple interface
wenzelm@10003
  2182
for definining proof methods in ML;
wenzelm@9612
  2183
wenzelm@10003
  2184
* Isar/Provers: intro/elim/dest attributes changed; renamed
wenzelm@9941
  2185
intro/intro!/intro!! flags to intro!/intro/intro? (INCOMPATIBILITY, in
wenzelm@9941
  2186
most cases, one should have to change intro!! to intro? only);
wenzelm@9941
  2187
replaced "delrule" by "rule del";
wenzelm@8283
  2188
wenzelm@10003
  2189
* Isar/Provers: new 'hypsubst' method, plain 'subst' method and
wenzelm@10003
  2190
'symmetric' attribute (the latter supercedes [RS sym]);
wenzelm@10003
  2191
wenzelm@10003
  2192
* Isar/Provers: splitter support (via 'split' attribute and 'simp'
wenzelm@10003
  2193
method modifier); 'simp' method: 'only:' modifier removes loopers as
wenzelm@10003
  2194
well (including splits);
wenzelm@10003
  2195
wenzelm@10003
  2196
* Isar/Provers: Simplifier and Classical methods now support all kind
wenzelm@10003
  2197
of modifiers used in the past, including 'cong', 'iff', etc.
wenzelm@10003
  2198
wenzelm@10003
  2199
* Isar/Provers: added 'fastsimp' and 'clarsimp' methods (combination
wenzelm@10003
  2200
of Simplifier and Classical reasoner);
wenzelm@10003
  2201
wenzelm@10003
  2202
* Isar/HOL: new proof method 'cases' and improved version of 'induct'
wenzelm@10003
  2203
now support named cases; major packages (inductive, datatype, primrec,
wenzelm@10003
  2204
recdef) support case names and properly name parameters;
wenzelm@9612
  2205
wenzelm@10003
  2206
* Isar/HOL: new transitivity rules for substitution in inequalities --
wenzelm@10003
  2207
monotonicity conditions are extracted to be proven at end of
wenzelm@10003
  2208
calculations;
wenzelm@10003
  2209
wenzelm@10003
  2210
* Isar/HOL: removed 'case_split' thm binding, should use 'cases' proof
wenzelm@10003
  2211
method anyway;
wenzelm@10003
  2212
wenzelm@10003
  2213
* Isar/HOL: removed old expand_if = split_if; theorems if_splits =
wenzelm@10003
  2214
split_if split_if_asm; datatype package provides theorems foo.splits =
wenzelm@10003
  2215
foo.split foo.split_asm for each datatype;
wenzelm@10003
  2216
wenzelm@10003
  2217
* Isar/HOL: tuned inductive package, rename "intrs" to "intros"
wenzelm@10003
  2218
(potential INCOMPATIBILITY), emulation of mk_cases feature for proof
wenzelm@10003
  2219
scripts: new 'inductive_cases' command and 'ind_cases' method; (Note:
wenzelm@10003
  2220
use "(cases (simplified))" method in proper proof texts);
wenzelm@10003
  2221
wenzelm@10003
  2222
* Isar/HOL: added global 'arith_split' attribute for 'arith' method;
wenzelm@10003
  2223
wenzelm@10003
  2224
* Isar: names of theorems etc. may be natural numbers as well;
wenzelm@10003
  2225
wenzelm@10003
  2226
* Isar: 'pr' command: optional arguments for goals_limit and
wenzelm@9724
  2227
ProofContext.prems_limit; no longer prints theory contexts, but only
wenzelm@9724
  2228
proof states;
wenzelm@8487
  2229
wenzelm@10003
  2230
* Isar: diagnostic commands 'pr', 'thm', 'prop', 'term', 'typ' admit
wenzelm@8518
  2231
additional print modes to be specified; e.g. "pr(latex)" will print
wenzelm@8518
  2232
proof state according to the Isabelle LaTeX style;
wenzelm@8487
  2233
wenzelm@10003
  2234
* Isar: improved support for emulating tactic scripts, including proof
wenzelm@9612
  2235
methods 'rule_tac' etc., 'cut_tac', 'thin_tac', 'subgoal_tac',
wenzelm@9612
  2236
'rename_tac', 'rotate_tac', 'tactic', and 'case_tac' / 'induct_tac'
wenzelm@9612
  2237
(for HOL datatypes);
wenzelm@8534
  2238
wenzelm@10003
  2239
* Isar: simplified (more robust) goal selection of proof methods: 1st
wenzelm@10003
  2240
goal, all goals, or explicit goal specifier (tactic emulation); thus
wenzelm@10003
  2241
'proof method scripts' have to be in depth-first order;
wenzelm@8673
  2242
wenzelm@10003
  2243
* Isar: tuned 'let' syntax: replaced 'as' keyword by 'and';
wenzelm@8729
  2244
wenzelm@10003
  2245
* Isar: removed 'help' command, which hasn't been too helpful anyway;
wenzelm@10003
  2246
should instead use individual commands for printing items
wenzelm@10003
  2247
(print_commands, print_methods etc.);
wenzelm@9224
  2248
wenzelm@10003
  2249
* Isar: added 'nothing' --- the empty list of theorems;
wenzelm@9239
  2250
wenzelm@8184
  2251
paulson@8014
  2252
*** HOL ***
paulson@8014
  2253
wenzelm@10080
  2254
* HOL/MicroJava: formalization of a fragment of Java, together with a
wenzelm@10080
  2255
corresponding virtual machine and a specification of its bytecode
wenzelm@10080
  2256
verifier and a lightweight bytecode verifier, including proofs of
wenzelm@10080
  2257
type-safety; by Gerwin Klein, Tobias Nipkow, David von Oheimb, and
wenzelm@10080
  2258
Cornelia Pusch (see also the homepage of project Bali at
wenzelm@10080
  2259
http://isabelle.in.tum.de/Bali/);
wenzelm@10080
  2260
wenzelm@8518
  2261
* HOL/Algebra: new theory of rings and univariate polynomials, by
wenzelm@8518
  2262
Clemens Ballarin;
paulson@8014
  2263
wenzelm@10157
  2264
* HOL/NumberTheory: fundamental Theorem of Arithmetic, Chinese
wenzelm@10003
  2265
Remainder Theorem, Fermat/Euler Theorem, Wilson's Theorem, by Thomas M
wenzelm@10003
  2266
Rasmussen;
wenzelm@8570
  2267
wenzelm@10157
  2268
* HOL/Lattice: fundamental concepts of lattice theory and order
wenzelm@10157
  2269
structures, including duals, properties of bounds versus algebraic
wenzelm@10157
  2270
laws, lattice operations versus set-theoretic ones, the Knaster-Tarski
wenzelm@10157
  2271
Theorem for complete lattices etc.; may also serve as a demonstration
wenzelm@10157
  2272
for abstract algebraic reasoning using axiomatic type classes, and
wenzelm@10157
  2273
mathematics-style proof in Isabelle/Isar; by Markus Wenzel;
wenzelm@10157
  2274
wenzelm@10003
  2275
* HOL/Prolog: a (bare-bones) implementation of Lambda-Prolog, by David
wenzelm@10003
  2276
von Oheimb;
paulson@9542
  2277
wenzelm@10164
  2278
* HOL/IMPP: extension of IMP with local variables and mutually
wenzelm@10164
  2279
recursive procedures, by David von Oheimb;
wenzelm@10164
  2280
wenzelm@10003
  2281
* HOL/Lambda: converted into new-style theory and document;
paulson@9542
  2282
wenzelm@10003
  2283
* HOL/ex/Multiquote: example of multiple nested quotations and
wenzelm@10003
  2284
anti-quotations -- basically a generalized version of de-Bruijn
wenzelm@10003
  2285
representation; very useful in avoiding lifting of operations;
wenzelm@8848
  2286
wenzelm@9612
  2287
* HOL/record: added general record equality rule to simpset; fixed
wenzelm@9612
  2288
select-update simplification procedure to handle extended records as
wenzelm@9612
  2289
well; admit "r" as field name;
paulson@9542
  2290
paulson@8967
  2291
* HOL: 0 is now overloaded over the new sort "zero", allowing its use with
paulson@8967
  2292
other numeric types and also as the identity of groups, rings, etc.;
paulson@8967
  2293
paulson@8967
  2294
* HOL: new axclass plus_ac0 for addition with the AC-laws and 0 as identity.
paulson@8967
  2295
Types nat and int belong to this axclass;
paulson@8967
  2296
wenzelm@10003
  2297
* HOL: greatly improved simplification involving numerals of type nat, int, real:
paulson@8788
  2298
   (i + #8 + j) = Suc k simplifies to  #7 + (i + j) = k
paulson@8832
  2299
   i*j + k + j*#3*i     simplifies to  #4*(i*j) + k
paulson@8832
  2300
  two terms #m*u and #n*u are replaced by #(m+n)*u
paulson@8832
  2301
    (where #m, #n and u can implicitly be 1; this is simproc combine_numerals)
paulson@8832
  2302
  and the term/formula #m*u+x ~~ #n*u+y simplifies simplifies to #(m-n)+x ~~ y
paulson@8832
  2303
    or x ~~ #(n-m)+y, where ~~ is one of = < <= or - (simproc cancel_numerals);
paulson@8736
  2304
wenzelm@10003
  2305
* HOL: meson_tac is available (previously in ex/meson.ML); it is a
wenzelm@10003
  2306
powerful prover for predicate logic but knows nothing of clasets; see
wenzelm@10003
  2307
ex/mesontest.ML and ex/mesontest2.ML for example applications;
paulson@9835
  2308
wenzelm@8848
  2309
* HOL: new version of "case_tac" subsumes both boolean case split and
wenzelm@8440
  2310
"exhaust_tac" on datatypes; INCOMPATIBILITY: exhaust_tac no longer
wenzelm@8518
  2311
exists, may define val exhaust_tac = case_tac for ad-hoc portability;
wenzelm@8440
  2312
wenzelm@8848
  2313
* HOL: simplification no longer dives into case-expressions: only the
wenzelm@10129
  2314
selector expression is simplified, but not the remaining arms; to
wenzelm@10129
  2315
enable full simplification of case-expressions for datatype t, you may
wenzelm@10129
  2316
remove t.weak_case_cong from the simpset, either globally (Delcongs
wenzelm@10129
  2317
[thm"t.weak_case_cong"];) or locally (delcongs [...]).
nipkow@8603
  2318
wenzelm@8848
  2319
* HOL/recdef: the recursion equations generated by 'recdef' for
wenzelm@8848
  2320
function 'f' are now called f.simps instead of f.rules; if all
wenzelm@8848
  2321
termination conditions are proved automatically, these simplification
wenzelm@8848
  2322
rules are added to the simpset, as in primrec; rules may be named
wenzelm@8848
  2323
individually as well, resulting in a separate list of theorems for
wenzelm@8848
  2324
each equation;
wenzelm@8848
  2325
wenzelm@9489
  2326
* HOL/While is a new theory that provides a while-combinator. It
wenzelm@9489
  2327
permits the definition of tail-recursive functions without the
wenzelm@9489
  2328
provision of a termination measure. The latter is necessary once the
wenzelm@9489
  2329
invariant proof rule for while is applied.
nipkow@9457
  2330
wenzelm@10003
  2331
* HOL: new (overloaded) notation for the set of elements below/above
wenzelm@10003
  2332
some element: {..u}, {..u(}, {l..}, {)l..}. See theory SetInterval.
nipkow@8925
  2333
wenzelm@8848
  2334
* HOL: theorems impI, allI, ballI bound as "strip";
wenzelm@8848
  2335
wenzelm@10003
  2336
* HOL: new tactic induct_thm_tac: thm -> string -> int -> tactic
nipkow@9746
  2337
induct_tac th "x1 ... xn" expects th to have a conclusion of the form
nipkow@9746
  2338
P v1 ... vn and abbreviates res_inst_tac [("v1","x1"),...,("vn","xn")] th;
nipkow@9746
  2339
wenzelm@10003
  2340
* HOL/Real: "rabs" replaced by overloaded "abs" function;
nipkow@9737
  2341
wenzelm@10003
  2342
* HOL: theory Sexp now in HOL/Induct examples (it used to be part of
wenzelm@10003
  2343
main HOL, but was unused);
nipkow@8626
  2344
wenzelm@10003
  2345
* HOL: fewer consts declared as global (e.g. have to refer to
wenzelm@10003
  2346
"Lfp.lfp" instead of "lfp" internally; affects ML packages only);
wenzelm@8887
  2347
wenzelm@10003
  2348
* HOL: tuned AST representation of nested pairs, avoiding bogus output
wenzelm@10003
  2349
in case of overlap with user translations (e.g. judgements over
wenzelm@10003
  2350
tuples); (note that the underlying logical represenation is still
wenzelm@10003
  2351
bogus);
wenzelm@9349
  2352
nipkow@8412
  2353
paulson@9542
  2354
*** ZF ***
paulson@9542
  2355
wenzelm@10003
  2356
* ZF: simplification automatically cancels common terms in arithmetic
wenzelm@10003
  2357
expressions over nat and int;
paulson@9542
  2358
wenzelm@10003
  2359
* ZF: new treatment of nat to minimize type-checking: all operators
wenzelm@10003
  2360
coerce their operands to a natural number using the function natify,
wenzelm@10003
  2361
making the algebraic laws unconditional;
paulson@9542
  2362
wenzelm@10003
  2363
* ZF: as above, for int: operators coerce their operands to an integer
wenzelm@10003
  2364
using the function intify;
paulson@9542
  2365
wenzelm@10003
  2366
* ZF: the integer library now contains many of the usual laws for the
wenzelm@10003
  2367
orderings, including $<=, and monotonicity laws for $+ and $*;
paulson@9542
  2368
wenzelm@10003
  2369
* ZF: new example ZF/ex/NatSum to demonstrate integer arithmetic
wenzelm@10003
  2370
simplification;
paulson@9388
  2371
wenzelm@10003
  2372
* FOL and ZF: AddIffs now available, giving theorems of the form P<->Q
wenzelm@10003
  2373
to the simplifier and classical reasoner simultaneously;
paulson@9388
  2374
paulson@9388
  2375
wenzelm@8358
  2376
*** General ***
wenzelm@8358
  2377
wenzelm@10003
  2378
* Provers: blast_tac now handles actual object-logic rules as
wenzelm@10003
  2379
assumptions; note that auto_tac uses blast_tac internally as well;
wenzelm@10003
  2380
wenzelm@10003
  2381
* Provers: new functions rulify/rulify_no_asm: thm -> thm for turning
wenzelm@10003
  2382
outer -->/All/Ball into ==>/!!; qed_spec_mp now uses rulify_no_asm;
wenzelm@10003
  2383
wenzelm@9941
  2384
* Provers: delrules now handles destruct rules as well (no longer need
wenzelm@9941
  2385
explicit make_elim);
wenzelm@9941
  2386
wenzelm@10003
  2387
* Provers: Blast_tac now warns of and ignores "weak elimination rules" e.g.
wenzelm@10003
  2388
  [| inj ?f;          ?f ?x = ?f ?y; ?x = ?y ==> ?W |] ==> ?W
wenzelm@10003
  2389
use instead the strong form,
wenzelm@10003
  2390
  [| inj ?f; ~ ?W ==> ?f ?x = ?f ?y; ?x = ?y ==> ?W |] ==> ?W
wenzelm@10003
  2391
in HOL, FOL and ZF the function cla_make_elim will create such rules
wenzelm@10003
  2392
from destruct-rules;
wenzelm@9489
  2393
wenzelm@9709
  2394
* Provers: Simplifier.easy_setup provides a fast path to basic
wenzelm@9709
  2395
Simplifier setup for new object-logics;
wenzelm@9709
  2396
wenzelm@9709
  2397
* Pure: AST translation rules no longer require constant head on LHS;
wenzelm@9349
  2398
wenzelm@9709
  2399
* Pure: improved name spaces: ambiguous output is qualified; support
wenzelm@9709
  2400
for hiding of names;
wenzelm@8729
  2401
wenzelm@10003
  2402
* system: smart setup of canonical ML_HOME, ISABELLE_INTERFACE, and
wenzelm@10003
  2403
XSYMBOL_HOME; no longer need to do manual configuration in most
wenzelm@10003
  2404
situations;
wenzelm@10003
  2405
wenzelm@9709
  2406
* system: compression of ML heaps images may now be controlled via -c
wenzelm@9709
  2407
option of isabelle and isatool usedir (currently only observed by
wenzelm@9709
  2408
Poly/ML);
wenzelm@8358
  2409
wenzelm@9981
  2410
* system: isatool installfonts may handle X-Symbol fonts as well (very
wenzelm@9981
  2411
useful for remote X11);
wenzelm@9981
  2412
wenzelm@9709
  2413
* system: provide TAGS file for Isabelle sources;
wenzelm@9052
  2414
wenzelm@9288
  2415
* ML: infix 'OF' is a version of 'MRS' with more appropriate argument
wenzelm@9288
  2416
order;
wenzelm@9288
  2417
wenzelm@8994
  2418
* ML: renamed flags Syntax.trace_norm_ast to Syntax.trace_ast; global
wenzelm@8994
  2419
timing flag supersedes proof_timing and Toplevel.trace;
wenzelm@8994
  2420
wenzelm@10003
  2421
* ML: new combinators |>> and |>>> for incremental transformations
wenzelm@10003
  2422
with secondary results (e.g. certain theory extensions):
wenzelm@10003
  2423
wenzelm@9330
  2424
* ML: PureThy.add_defs gets additional argument to indicate potential
wenzelm@9330
  2425
overloading (usually false);
wenzelm@9330
  2426
wenzelm@10003
  2427
* ML: PureThy.add_thms/add_axioms/add_defs now return theorems as
wenzelm@10003
  2428
results;
wenzelm@8440
  2429
wenzelm@8358
  2430
wenzelm@8015
  2431
wenzelm@7986
  2432
New in Isabelle99 (October 1999)
wenzelm@7986
  2433
--------------------------------
oheimb@4649
  2434
paulson@5931
  2435
*** Overview of INCOMPATIBILITIES (see below for more details) ***
paulson@5931
  2436
paulson@6922
  2437
* HOL: The THEN and ELSE parts of conditional expressions (if P then x else y)
paulson@6922
  2438
are no longer simplified.  (This allows the simplifier to unfold recursive
paulson@6922
  2439
functional programs.)  To restore the old behaviour, declare
wenzelm@7215
  2440
wenzelm@7215
  2441
    Delcongs [if_weak_cong];
paulson@6922
  2442
wenzelm@6269
  2443
* HOL: Removed the obsolete syntax "Compl A"; use -A for set
wenzelm@6269
  2444
complement;
paulson@5931
  2445
wenzelm@6269
  2446
* HOL: the predicate "inj" is now defined by translation to "inj_on";
paulson@6174
  2447
berghofe@7847
  2448
* HOL/datatype: mutual_induct_tac no longer exists --
berghofe@7847
  2449
  use induct_tac "x_1 ... x_n" instead of mutual_induct_tac ["x_1", ..., "x_n"]
berghofe@7847
  2450
wenzelm@6386
  2451
* HOL/typedef: fixed type inference for representing set; type
wenzelm@6386
  2452
arguments now have to occur explicitly on the rhs as type constraints;
wenzelm@6386
  2453
wenzelm@6269
  2454
* ZF: The con_defs part of an inductive definition may no longer refer
wenzelm@6269
  2455
to constants declared in the same theory;
nipkow@6057
  2456
wenzelm@6269
  2457
* HOL, ZF: the function mk_cases, generated by the inductive
wenzelm@6269
  2458
definition package, has lost an argument.  To simplify its result, it
wenzelm@6269
  2459
uses the default simpset instead of a supplied list of theorems.
paulson@6141
  2460
wenzelm@7215
  2461
* HOL/List: the constructors of type list are now Nil and Cons;
wenzelm@7215
  2462
nipkow@7619
  2463
* Simplifier: the type of the infix ML functions
wenzelm@8729
  2464
        setSSolver addSSolver setSolver addSolver
nipkow@7619
  2465
is now  simpset * solver -> simpset  where `solver' is a new abstract type
nipkow@7619
  2466
for packaging solvers. A solver is created via
wenzelm@8729
  2467
        mk_solver: string -> (thm list -> int -> tactic) -> solver
nipkow@7619
  2468
where the string argument is only a comment.
nipkow@6057
  2469
wenzelm@7647
  2470
paulson@6069
  2471
*** Proof tools ***
paulson@6069
  2472
wenzelm@6343
  2473
* Provers/Arith/fast_lin_arith.ML contains a functor for creating a
wenzelm@6343
  2474
decision procedure for linear arithmetic. Currently it is used for
wenzelm@7593
  2475
types `nat', `int', and `real' in HOL (see below); it can, should and
wenzelm@7593
  2476
will be instantiated for other types and logics as well.
paulson@6069
  2477
nipkow@7324
  2478
* The simplifier now accepts rewrite rules with flexible heads, eg
nipkow@7324
  2479
     hom ?f ==> ?f(?x+?y) = ?f ?x + ?f ?y
nipkow@7324
  2480
  They are applied like any rule with a non-pattern lhs, i.e. by first-order
nipkow@7324
  2481
  matching.
paulson@6069
  2482
wenzelm@7593
  2483
paulson@6014
  2484
*** General ***
paulson@6014
  2485
wenzelm@7986
  2486
* New Isabelle/Isar subsystem provides an alternative to traditional
wenzelm@7215
  2487
tactical theorem proving; together with the ProofGeneral/isar user
wenzelm@7215
  2488
interface it offers an interactive environment for developing human
wenzelm@7215
  2489
readable proof documents (Isar == Intelligible semi-automated
wenzelm@7886
  2490
reasoning); for further information see isatool doc isar-ref,
wenzelm@7986
  2491
src/HOL/Isar_examples and http://isabelle.in.tum.de/Isar/
wenzelm@7886
  2492
wenzelm@9612
  2493
* improved and simplified presentation of theories: better HTML markup
wenzelm@9612
  2494
(including colors), graph views in several sizes; isatool usedir now
wenzelm@9612
  2495
provides a proper interface for user theories (via -P option); actual
wenzelm@9612
  2496
document preparation based on (PDF)LaTeX is available as well (for
wenzelm@9612
  2497
new-style theories only); see isatool doc system for more information;
wenzelm@7215
  2498
wenzelm@7252
  2499
* native support for Proof General, both for classic Isabelle and
wenzelm@7986
  2500
Isabelle/Isar;
wenzelm@7215
  2501
wenzelm@7791
  2502
* ML function thm_deps visualizes dependencies of theorems and lemmas,
wenzelm@7791
  2503
using the graph browser tool;
wenzelm@7791
  2504
wenzelm@6751
  2505
* Isabelle manuals now also available as PDF;
wenzelm@6751
  2506
wenzelm@6449
  2507
* theory loader rewritten from scratch (may not be fully
wenzelm@6449
  2508
bug-compatible); old loadpath variable has been replaced by show_path,
wenzelm@6671
  2509
add_path, del_path, reset_path functions; new operations such as
wenzelm@7593
  2510
update_thy, touch_thy, remove_thy, use/update_thy_only (see also
wenzelm@7593
  2511
isatool doc ref);
wenzelm@6449
  2512
wenzelm@7215
  2513
* improved isatool install: option -k creates KDE application icon,
wenzelm@7215
  2514
option -p DIR installs standalone binaries;
wenzelm@7215
  2515
wenzelm@7215
  2516
* added ML_PLATFORM setting (useful for cross-platform installations);
wenzelm@7215
  2517
more robust handling of platform specific ML images for SML/NJ;
wenzelm@7215
  2518
wenzelm@7886
  2519
* the settings environment is now statically scoped, i.e. it is never
wenzelm@7986
  2520
created again in sub-processes invoked from isabelle, isatool, or
wenzelm@7886
  2521
Isabelle;
wenzelm@7886
  2522
wenzelm@7215
  2523
* path element specification '~~' refers to '$ISABELLE_HOME';
wenzelm@7215
  2524
wenzelm@6343
  2525
* in locales, the "assumes" and "defines" parts may be omitted if
wenze