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Subject: Announcing Isabelle2004
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To: isabelle-users@cl.cam.ac.uk
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Isabelle2004 is now available.
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This release provides many improvements and a few substantial advances over
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Isabelle2003. The most prominent highlights of Isabelle2004 are as follows
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(see the NEWS of the distribution for more details):
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* New image HOL4 with imported library from HOL4 system on top of
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HOL-Complex (about 2500 additional theorems).
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* New theory Ring_and_Field with over 250 basic numerical laws,
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all proved in axiomatic type classes for semirings, rings and fields.
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* Type "rat" of the rational numbers available in HOL-Complex.
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* New locale "ring" for non-commutative rings in HOL-Algebra.
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* New theory of matrices with an application to linear programming in
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HOL-Matrix.
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* Improved locales (named proof contexts), instantiation of locales.
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* Improved handling of linear and partial orders in simplifier.
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* New "specification" command for definition by specification.
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* New Isar command "finalconsts" prevents constants being given a definition
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later.
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* Command "arith" now generates counterexamples for reals as well.
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* New "quickcheck" command to search for counterexamples of executable goals.
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(see HOL/ex/Quickcheck_Examples.thy)
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* New "refute" command to search for finite countermodels of goals.
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(see HOL/ex/Refute_Examples.thy)
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* Presentation and x-symbol enhancements, greek letters and sub/superscripts
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allowed in identifiers.
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You may get Isabelle2004 from the following mirror sites:
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Cambridge (UK) http://www.cl.cam.ac.uk/Research/HVG/Isabelle/dist/
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Munich (Germany) http://isabelle.in.tum.de/dist/
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Sydney (Australia) http://mirror.cse.unsw.edu.au/pub/isabelle/
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Gerwin Klein
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Tobias Nipkow
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Larry Paulson
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