1 Subject: Announcing Isabelle2009-2
2 To: isabelle-users@cl.cam.ac.uk
4 Isabelle2009-2 is now available.
6 This release improves upon Isabelle2009-1 in many respects, see the
7 NEWS file in the distribution for more details. Some notable changes
10 * Explicit proof terms for type class reasoning.
12 * Authentic syntax for *all* logical entities (type classes, type
13 constructors, term constants): provides simple and robust
14 correspondence between formal entities and concrete syntax.
16 * HOL: Package for constructing quotient types.
18 * HOL: Code generation now with simple concept for abstract
19 datatypes obeying invariants; applications for typical data structures
20 (e.g. search trees) can be found in the library.
22 * HOL: New development of the Reals using Cauchy Sequences.
24 * HOL: Reorganization of abstract algebra type class hierarchy.
26 * Commands 'types', 'typedecl' and 'typedef' now work within a local theory
27 context -- without introducing dependencies on parameters or
30 You may get Isabelle2009-2 from the following mirror sites:
32 Cambridge (UK) http://www.cl.cam.ac.uk/research/hvg/Isabelle/
33 Munich (Germany) http://isabelle.in.tum.de/
34 Sydney (Australia) http://mirror.cse.unsw.edu.au/pub/isabelle/