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ANNOUNCE

author | nipkow |

Mon, 12 May 2003 19:54:43 +0200 | |

changeset 14023 | 180f01d9df2c |

parent 14022 | 3407f1b807ce |

child 14614 | 196ff8d245bf |

permissions | -rw-r--r-- |

*** empty log message ***

Subject: Announcing Isabelle2003 To: isabelle-users@cl.cam.ac.uk Isabelle2003 is now available. This release provides many improvements and a few substantial advances over Isabelle2002. The most prominent highlights of Isabelle2003 are as follows (see the NEWS of the distribution for more details): * New framework for extracting programs from constructive proofs in HOL. (Berghofer) * Improved simplifier. The premises of a goal are completely interreduced, ie simplified wrt each other. (Berghofer) * Presburger arithmetic. Method arith can deal with quantified formulae over nat and int, and with mod, div and dvd wrt a numeral. (Chaieb and Nipkow) * New command to find all rules whose conclusion matches the current goal. * New command to trace why unification failed. * Locales (named proof contexts). The new implementation is fully integrated with Isar's notion of proof context, and locale specifications produce predicate definitions that allow to work with locales in more flexible ways. (Wenzel) * HOL/Algebra: proofs in classical algebra. Intended as a base for all algebraic developments in HOL. Currently covers group and ring theory. (Ballarin, Kammüller, Paulson) * HOL/Complex defines the type "complex" of the complex numbers, with numeric constants and some complex analysis, including nonstandard analysis. The image HOL-Complex should be used for developments involving the real numbers too. Gauge integration and hyperreal logarithms have recently been added. (Fleuriot) * HOL/NumberTheory: added Gauss's law of quadratic reciprocity. (Avigad, Gray and Kramer) * ZF/Constructible: Gödel's proof of the relative consistency of the axiom of choice is mechanized using Isabelle/ZF, following Kunen's well-known textbook "Set Theory". (Paulson) You may get Isabelle2003 from the following mirror sites: Cambridge (UK) http://www.cl.cam.ac.uk/Research/HVG/Isabelle/dist/ Munich (Germany) http://isabelle.in.tum.de/dist/ Gerwin Klein Tobias Nipkow Larry Paulson