removed Syntax/parse_tree.ML;

optimized the number of eta-contractions in rewriting

added a check for existence of a temporary file before removing it

used unlink for delete_files instead of calling rm

commented out sig constraint of functor (for debugging purposes);

ZF/perm/image_comp: new

got rid of METAHYPS due to the change of the basic simplification routines (see update of Pure/{thm,drule,tactic}.ML)

adapted a proof to the new solver (see change of FOL/simpdata.ML)

updated solver of FOL_ss. see change of HOL/simpdata.ML

added new parameter to the simplification tactics which indicates if assumptions are to be simplified and/or to be used when simplifying the conclusion. This gets rid of METAHYPS and speeds up simplification of goals with big assumptions.

added lexical class of type variables

shortened msg

added fake_cterm_of to speed up rewriting

commented out sig constraint of functor (for debugging purposes);

changed tracing of simplifier

optimized simplifier - signature of rewritten term stays constant

added "Reading thy-File" message

added subsig: sg * sg -> bool to test if one signature is contained in another.

added sys_error;

fixed a bug in update/next_level which occured when a child wasn't loaded

added empty type-abbr field to extend_theory

added []-field to extend_theory: no type abbreviations.

Added []-field to extend_theory to accomodate type abbreviations.

Necessary changes to accomodate type abbreviations.

pretty_thm is now exported;

new section for equality properties

Updated read_insts to approximate simultaneous type checking of substitution pairs.

added isabelle-users paragraph

added mention of simplifier, splitter, hypsubst

new year

updated instantiate to deal with type clashes

ZF/equalities/SUM_eq_UN: new ZF/equalities: corrected bound variable anomalies in some distributive laws

Pure/tactic/compose_inst_tac: when catching exception THM, prints the message before failing!! This reports the reason for failure in cases like by (res_inst_tac [("P", "?Q(a)")] mp 1); in which ?Q appears in mp with a different type.

deleted harmful basify, which pulled rewrite rules down to base type. Not needed for new simplifier.

added rep_tsig

last minute changes, eg literal tokens -> delimiters and valued tokens -> names.

ZF/univ/in_Vfrom_limit: new ZF/univ/sum_in_Vfrom, etc: streamlined proofs using in_Vfrom_limit

ZF/ord/Ord_Un,Ord_Int,Un_upper1_le,Un_upper2_le: new

Typos and style

Changed Acknowledgements

Acknowledged Carsten Clasohm

New distributive laws for Sigma and UN

removal of amssymbols.sty and lcp.sty; addition of iman.sty

ZF/ex/ROOT: changed many time_use calls to time_use_thy or else deleted them, to make the most of the load-path mechanism. (use_thy adds the new theory to the list of loaded theories.)

minor corrections

new references

now inspects FOLP_build_completed

now declares FOLP_build_completed

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ZF/ex/llist_eq/lleq_Int_Vset_subset_lemma, ZF/ex/counit/counit2_Int_Vset_subset_lemma: now uses QPair_Int_Vset_subset_UN ZF/ex/llistfn/flip_llist_quniv_lemma: now uses transfinite induction and QPair_Int_Vset_subset_UN ZF/ex/llist/llist_quniv_lemma: now uses transfinite induction and QPair_Int_Vset_subset_UN

changed split_filename, remove_ext; added base_name;

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ZF/quniv/QPair_Int_Vset_subset_UN: new, isolates key argument of many coinduction proofs ZF/quniv: deleted the following obsolete theorems (saved on Isa/old): Int_Vfrom_0_in_quniv Pair_in_quniv_D QInl_Int_Vfrom_succ_in_quniv QInl_Int_quniv_in_quniv QPair_Int_Vfrom_in_quniv QPair_Int_Vfrom_succ_in_quniv QPair_Int_quniv_eq QPair_Int_quniv_in_quniv QPair_Int_quniv_in_quniv product_Int_quniv_eq quniv_Int_Vfrom zero_Int_in_quniv

extend: cleaned up, adapted for new Syntax.extend; extend, merge: improved roots (logical_types) handling;

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added (partial) extend_tables; improved extend; fixed roots handling of extend and merge;

changed datatype ext;

improved comments;

added SCANNER; changed scan_any: no longer uses take_prefix;