For the purposes of the license agreement in the file COPYRIGHT, a

'contributor' is anybody who is listed in this file (CONTRIBUTORS) or

who is listed as an author in one of the source files of this Isabelle

distribution.

Contributions to Isabelle2012

-----------------------------

* April 2012: Johannes Hölzl, TUM

  Probability: Introduced type to represent measures instead of locales.

* April 2012: Johannes Hölzl, Fabian Immler, TUM

  Float: Moved to Dyadic rationals to represent floating point numers.

* April 2012: Thomas Sewell, NICTA

    (based on work done with Sascha Boehme, TUM in 2010)

  WordBitwise: logic/circuit expansion of bitvector equalities/inequalities.

* March 2012: Christian Sternagel, Japan Advanced Institute of Science

  and Technology

  Consolidated theory of relation composition.

* March 2012: Nik Sultana, University of Cambridge

  HOL/TPTP parser and import facilities.

* March 2012: Cezary Kaliszyk, University of Innsbruck and

  Alexander Krauss, QAware GmbH

  Faster and more scalable Import mechanism for HOL Light proofs.

* January 2012: Florian Haftmann, TUM, et al.

  (Re-)Introduction of the "set" type constructor.

* 2012: Ondrej Kuncar, TUM

  New package Lifting, various improvements and refinements to the Quotient package.

* 2011/2012: Jasmin Blanchette, TUM

  Various improvements to Sledgehammer, notably: tighter integration

  with SPASS, support for more provers (Alt-Ergo, iProver, iProver-Eq).

* 2011/2012: Makarius Wenzel, Université Paris-Sud / LRI

  Various refinements of local theory infrastructure.

  Improvements of Isabelle/Scala layer and Isabelle/jEdit Prover IDE.

Contributions to Isabelle2011-1

-------------------------------

* September 2011: Peter Gammie

  Theory HOL/Library/Saturated: numbers with saturated arithmetic.

* August 2011: Florian Haftmann, Johannes Hölzl and Lars Noschinski, TUM

  Refined theory on complete lattices.

* August 2011: Brian Huffman, Portland State University

  Miscellaneous cleanup of Complex_Main and Multivariate_Analysis.

* June 2011: Brian Huffman, Portland State University

  Proof method "countable_datatype" for theory Library/Countable.

* 2011: Jasmin Blanchette, TUM

  Various improvements to Sledgehammer, notably: use of sound

  translations, support for more provers (Waldmeister, LEO-II,

  Satallax). Further development of Nitpick and 'try' command.

* 2011: Andreas Lochbihler, Karlsruhe Institute of Technology

  Theory HOL/Library/Cset_Monad allows do notation for computable sets

  (cset) via the generic monad ad-hoc overloading facility.

* 2011: Johannes Hölzl, Armin Heller, TUM and

  Bogdan Grechuk, University of Edinburgh

  Theory HOL/Library/Extended_Reals: real numbers extended with plus

  and minus infinity.

* 2011: Makarius Wenzel, Université Paris-Sud / LRI

  Various building blocks for Isabelle/Scala layer and Isabelle/jEdit

  Prover IDE.

Contributions to Isabelle2011

-----------------------------

* January 2011: Stefan Berghofer, secunet Security Networks AG

  HOL-SPARK: an interactive prover back-end for SPARK.

* October 2010: Bogdan Grechuk, University of Edinburgh

  Extended convex analysis in Multivariate Analysis.

* October 2010: Dmitriy Traytel, TUM

  Coercive subtyping via subtype constraints.

* October 2010: Alexander Krauss, TUM

  Command partial_function for function definitions based on complete

  partial orders in HOL.

* September 2010: Florian Haftmann, TUM

  Refined concepts for evaluation, i.e., normalization of terms using

  different techniques.

* September 2010: Florian Haftmann, TUM

  Code generation for Scala.

* August 2010: Johannes Hoelzl, Armin Heller, and Robert Himmelmann, TUM

  Improved Probability theory in HOL.

* July 2010: Florian Haftmann, TUM

  Reworking and extension of the Imperative HOL framework.

* July 2010: Alexander Krauss, TUM and Christian Sternagel, University

    of Innsbruck

  Ad-hoc overloading. Generic do notation for monads.

Contributions to Isabelle2009-2

-------------------------------

* 2009/2010: Stefan Berghofer, Alexander Krauss, and Andreas Schropp, TUM,

  Makarius Wenzel, TUM / LRI

  Elimination of type classes from proof terms.

* April 2010: Florian Haftmann, TUM

  Reorganization of abstract algebra type classes.

* April 2010: Florian Haftmann, TUM

  Code generation for data representations involving invariants;

  various collections avaiable in theories Fset, Dlist, RBT,

  Mapping and AssocList.

* March 2010: Sascha Boehme, TUM

  Efficient SHA1 library for Poly/ML.

* February 2010: Cezary Kaliszyk and Christian Urban, TUM

  Quotient type package for Isabelle/HOL.

Contributions to Isabelle2009-1

-------------------------------

* November 2009, Brian Huffman, PSU

  New definitional domain package for HOLCF.

* November 2009: Robert Himmelmann, TUM

  Derivation and Brouwer's fixpoint theorem in Multivariate Analysis.

* November 2009: Stefan Berghofer and Lukas Bulwahn, TUM

  A tabled implementation of the reflexive transitive closure.

* November 2009: Lukas Bulwahn, TUM

  Predicate Compiler: a compiler for inductive predicates to

  equational specifications.

* November 2009: Sascha Boehme, TUM and Burkhart Wolff, LRI Paris

  HOL-Boogie: an interactive prover back-end for Boogie and VCC.

* October 2009: Jasmin Blanchette, TUM

  Nitpick: yet another counterexample generator for Isabelle/HOL.

* October 2009: Sascha Boehme, TUM

  Extension of SMT method: proof-reconstruction for the SMT solver Z3.

* October 2009: Florian Haftmann, TUM

  Refinement of parts of the HOL datatype package.

* October 2009: Florian Haftmann, TUM

  Generic term styles for term antiquotations.

* September 2009: Thomas Sewell, NICTA

  More efficient HOL/record implementation.

* September 2009: Sascha Boehme, TUM

  SMT method using external SMT solvers.

* September 2009: Florian Haftmann, TUM

  Refinement of sets and lattices.

* July 2009: Jeremy Avigad and Amine Chaieb

  New number theory.

* July 2009: Philipp Meyer, TUM

  HOL/Library/Sum_Of_Squares: functionality to call a remote csdp

  prover.

* July 2009: Florian Haftmann, TUM

  New quickcheck implementation using new code generator.

* July 2009: Florian Haftmann, TUM

  HOL/Library/Fset: an explicit type of sets; finite sets ready to use

  for code generation.

* June 2009: Florian Haftmann, TUM

  HOL/Library/Tree: search trees implementing mappings, ready to use

  for code generation.

* March 2009: Philipp Meyer, TUM

  Minimization tool for results from Sledgehammer.

Contributions to Isabelle2009

-----------------------------

* March 2009: Robert Himmelmann, TUM and Amine Chaieb, University of

  Cambridge

  Elementary topology in Euclidean space.

* March 2009: Johannes Hoelzl, TUM

  Method "approximation", which proves real valued inequalities by

  computation.

* February 2009: Filip Maric, Univ. of Belgrade

  A Serbian theory.

* February 2009: Jasmin Christian Blanchette, TUM

  Misc cleanup of HOL/refute.

* February 2009: Timothy Bourke, NICTA

  New find_consts command.

* February 2009: Timothy Bourke, NICTA

  "solves" criterion for find_theorems and auto_solve option

* December 2008: Clemens Ballarin, TUM

  New locale implementation.

* December 2008: Armin Heller, TUM and Alexander Krauss, TUM

  Method "sizechange" for advanced termination proofs.

* November 2008: Timothy Bourke, NICTA

  Performance improvement (factor 50) for find_theorems.

* 2008: Florian Haftmann, TUM

  Various extensions and restructurings in HOL, improvements

  in evaluation mechanisms, new module binding.ML for name bindings.

* October 2008: Fabian Immler, TUM

  ATP manager for Sledgehammer, based on ML threads instead of Posix

  processes.  Additional ATP wrappers, including remote SystemOnTPTP

  services.

* September 2008: Stefan Berghofer, TUM and Marc Bezem, Univ. Bergen

  Prover for coherent logic.

* August 2008: Fabian Immler, TUM

  Vampire wrapper script for remote SystemOnTPTP service.

Contributions to Isabelle2008

-----------------------------

* 2007/2008:

  Alexander Krauss, TUM and Florian Haftmann, TUM and Stefan Berghofer, TUM

  HOL library improvements.

* 2007/2008: Brian Huffman, PSU

  HOLCF library improvements.

* 2007/2008: Stefan Berghofer, TUM

  HOL-Nominal package improvements.

* March 2008: Markus Reiter, TUM

  HOL/Library/RBT: red-black trees.

* February 2008: Alexander Krauss, TUM and Florian Haftmann, TUM and

  Lukas Bulwahn, TUM and John Matthews, Galois:

  HOL/Library/Imperative_HOL: Haskell-style imperative data structures

  for HOL.

* December 2007: Norbert Schirmer, Uni Saarbruecken

  Misc improvements of record package in HOL.

* December 2007: Florian Haftmann, TUM

  Overloading and class instantiation target.

* December 2007: Florian Haftmann, TUM

  New version of primrec package for local theories.

* December 2007: Alexander Krauss, TUM

  Method "induction_scheme" in HOL.

* November 2007: Peter Lammich, Uni Muenster

  HOL-Lattice: some more lemmas.

Contributions to Isabelle2007

-----------------------------

* October 2007: Norbert Schirmer, TUM / Uni Saarbruecken

  State Spaces: The Locale Way (in HOL).

* October 2007: Mark A. Hillebrand, DFKI

  Robust sub/superscripts in LaTeX document output.

* August 2007: Jeremy Dawson, NICTA and Paul Graunke, Galois and Brian

    Huffman, PSU and Gerwin Klein, NICTA and John Matthews, Galois

  HOL-Word: a library for fixed-size machine words in Isabelle.

* August 2007: Brian Huffman, PSU

  HOL/Library/Boolean_Algebra and HOL/Library/Numeral_Type.

* June 2007: Amine Chaieb, TUM

  Semiring normalization and Groebner Bases.

  Support for dense linear orders.

* June 2007: Joe Hurd, Oxford

  Metis theorem-prover.

* 2007: Kong W. Susanto, Cambridge

  HOL: Metis prover integration.

* 2007: Stefan Berghofer, TUM

  HOL: inductive predicates and sets.

* 2007: Norbert Schirmer, TUM

  HOL/record: misc improvements.

* 2006/2007: Alexander Krauss, TUM

  HOL: function package and related theories on termination.

* 2006/2007: Florian Haftmann, TUM

  Pure: generic code generator framework.

  Pure: class package.

  HOL: theory reorganization, code generator setup.

* 2006/2007: Christian Urban, TUM and Stefan Berghofer, TUM and

    Julien Narboux, TUM

  HOL/Nominal package and related tools.

* November 2006: Lukas Bulwahn, TUM

  HOL: method "lexicographic_order" for function package.

* October 2006: Stefan Hohe, TUM

  HOL-Algebra: ideals and quotients over rings.

* August 2006: Amine Chaieb, TUM

  Experimental support for generic reflection and reification in HOL.

* July 2006: Rafal Kolanski, NICTA

  Hex (0xFF) and binary (0b1011) numerals.

* May 2006: Klaus Aehlig, LMU

  Command 'normal_form': normalization by evaluation.

* May 2006: Amine Chaieb, TUM

  HOL-Complex: Ferrante and Rackoff Algorithm for linear real

  arithmetic.

* February 2006: Benjamin Porter, NICTA

  HOL and HOL-Complex: generalised mean value theorem, continuum is

  not denumerable, harmonic and arithmetic series, and denumerability

  of rationals.

* October 2005: Martin Wildmoser, TUM

  Sketch for Isar 'guess' element.

Contributions to Isabelle2005

-----------------------------

* September 2005: Lukas Bulwahn and Bernhard Haeupler, TUM

  HOL-Complex: Formalization of Taylor series.

* September 2005: Stephan Merz, Alwen Tiu, QSL Loria

  Components for SAT solver method using zChaff.

* September 2005: Ning Zhang and Christian Urban, LMU Munich

  A Chinese theory.

* September 2005: Bernhard Haeupler, TUM

  Method comm_ring for proving equalities in commutative rings.

* July/August 2005: Jeremy Avigad, Carnegie Mellon University

  Various improvements of the HOL and HOL-Complex library.

* July 2005: Florian Zuleger, Johannes Hoelzl, and Simon Funke, TUM

  Some structured proofs about completeness of real numbers.

* May 2005: Rafal Kolanski and Gerwin Klein, NICTA

  Improved retrieval of facts from theory/proof context.

* February 2005: Lucas Dixon, University of Edinburgh

  Improved subst method.

* 2005: Brian Huffman, OGI

  Various improvements of HOLCF.

  Some improvements of the HOL-Complex library.

* 2005: Claire Quigley and Jia Meng, University of Cambridge

  Some support for asynchronous communication with external provers

  (experimental).

* 2005: Florian Haftmann, TUM

  Contributions to document 'sugar'.

  Various ML combinators, notably linear functional transformations.

  Some cleanup of ML legacy.

  Additional antiquotations.

  Improved Isabelle web site.

* 2004/2005: David Aspinall, University of Edinburgh

  Various elements of XML and PGIP based communication with user

  interfaces (experimental).

* 2004/2005: Gerwin Klein, NICTA

  Contributions to document 'sugar'.

  Improved Isabelle web site.

  Improved HTML presentation of theories.

* 2004/2005: Clemens Ballarin, TUM

  Provers: tools for transitive relations and quasi orders.

  Improved version of locales, notably interpretation of locales.

  Improved version of HOL-Algebra.

* 2004/2005: Amine Chaieb, TUM

  Improved version of HOL presburger method.

* 2004/2005: Steven Obua, TUM

  Improved version of HOL/Import, support for HOL-Light.

  Improved version of HOL-Complex-Matrix.

  Pure/defs: more sophisticated checks on well-formedness of overloading.

  Pure/Tools: an experimental evaluator for lambda terms.

* 2004/2005: Norbert Schirmer, TUM

  Contributions to document 'sugar'.

  Improved version of HOL/record.

* 2004/2005: Sebastian Skalberg, TUM

  Improved version of HOL/Import.

  Some internal ML reorganizations.

* 2004/2005: Tjark Weber, TUM

  SAT solver method using zChaff.

  Improved version of HOL/refute.