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