Variable and value elimination in binary constraint satisfaction via forbidden patterns

12 Feb 2015David A. CohenMartin C. CooperGuillaume EscamocherStanislav Zivny

Variable or value elimination in a constraint satisfaction problem (CSP) can be used in preprocessing or during search to reduce search space size. A variable elimination rule (value elimination rule) allows the polynomial-time identification of certain variables (domain elements) whose elimination, without the introduction of extra compensatory constraints, does not affect the satisfiability of an instance... (read more)

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