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3TAP  Manyvalued tableaubased theorem prover developed at the University of Karlsruhe. It can be instantiated for arbitrary finitelyvalued firstorder logics, and it can handle equality (twovalued), sorts, and nonclausal input.
Automated Reasoning Project  Web resource provided by research group. Includes access to software developed by the team, coverering such projects as FINDER (Finite Domain Enumerator), MaGIC (Matrix Generator for Implication Connectives) and Kripke (A theorem prover for the relevant logic LR).
Bertrand  Firstorder satisfiability checker and prover for the Macintosh.
Database of Existing Mechanized Reasoning Systems  A list (>50 entries) of automatic resolution provers (like Otter), interactive provers (like PVS) and other mechanized reasoning tools.
Excel Logic Tool  Free Excel logic processor addin for symbolic logic and mathematics.
Isabelle  "The" Isabelle theorem proving environment.
LOOM  A language and environment for constructing intelligent applications. It is a research project in the Artificial Intelligence research group at the University of Southern California's Information Sciences Institute. The goal of the project is to develop and field advanced tools for knowledge representation and reasoning in Artificial Intelligence.
LWB  Logics Workbench.
Logic Software from CSLI  By Jon Barwise and John Etchemendy.
MUltlog  Takes as input the specification of a finitelyvalued firstorder logic and produces a sequent calculus, a natural deduction system, and clause formation rules for this logic.
MUltseq  A generic sequent prover for propositional finitelyvalued logics.
PROTEIN  A PROver with a Theory Extension INterface. Theorem prover for firstorder clause logic, written in ECRC's Prologdialect ECLiPSe. Free download, documentation.
ProofGeneral  Comprehensive GnuEmacs and XEmacs interface for several theorem provers (currently, Coq, Isabelle, Lego, and Phox).
ProofPower  A suite of tools supporting specification and proof in Higher Order Logic (HOL) and in Z notation.
SAT Hard Instance Generator and Solution Algorithms  Utilities and algorithms by V. Z. Nuri.
SwitchMin Digital Circuit Minimizer  Tool for minimizing boolean logic functions.
The Coq Project  Our work deals with effectively machinechecked formal mathematics. In practice, this includes the study of mathematical formalisms wellsuited for implementations, the implementations themselves and the use of these for various applications. We are particulary interested in software correctness proofs.
The ILF System  A Tool for the Integration of Logical Functions. ILF is a shell that facilitates the work with a variety of theorem provers. Currently, it has interfaces with the automated provers Discount, Protein, Setheo and Spass.
The leanTAP Home Page  Lean, Tableaubased Deduction (theorem prover for first order logic).
Theorem Provers  A list of (wellknown) theorem provers on logicserver at the university of Muenchen. Good point to start.
