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The interactive mathematical programming system GYWOPT is released as free software. It has been developed since early 2000 for experiments with the Integral Basis Method for integer programming by U.-U. Haus, M. Köppe and R. Weismantel.
A declarative logic programming system with first-class relations
embedded in a pure functional subset of Scheme. The system has true
unions, fair scheduling, lexically-scoped logical variables,
set-theoretical semantics, high performance without cuts
The Dolphin Project is intended to be a research project aggregating tools related to OpenSource Satisfiability Solver tools and tools related to them like Bounded Model Checkers and Software Verifiers.