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arXiv · 1008.1809

Symmetry-breaking Answer Set Solving

Christian Drescher·Oana Tifrea·Toby Walsh
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Abstract

In the context of Answer Set Programming, this paper investigates symmetry-breaking to eliminate symmetric parts of the search space and, thereby, simplify the solution process. We propose a reduction of disjunctive logic programs to a coloured digraph such that permutational symmetries can be constructed from graph automorphisms. Symmetries are then broken by introducing symmetry-breaking constraints. For this purpose, we formulate a preprocessor that integrates a graph automorphism system. Experiments demonstrate its computational impact.

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Christian Drescher, Oana Tifrea, Toby Walsh. 2010-08-10. Symmetry-breaking Answer Set Solving. https://arxiv.org/abs/1008.1809

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