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@Proceedings{Werner-EURO07,
author = {Tom{\'a}{\vs} Werner},
title = {Unifying Arc Consistency for Semiring-Based Constraint Satisfaction and Optimization},
month = {July},
year = {2007},
booktitle = {22nd Conf. on Operational Research, Prague},
note = {Invited talk.},
annote = {(Soft) constraint satisfaction problems are general
problems of combinatorial optimization. They can be uni ed by
algebraic formulation, e.g., by using two abstract operations
forming a commutative semiring. A fundamental concept to tackle the
crisp CSP is arc consistency. We generalize arc consistency to some
soft CSPs and formulate it the semiring framework. We newly
introduce sum-product arc consistency and give its relation to
max-sum arc consistency and optimal max-sum arc consistency. We give
a criterion that decreases after every arc consistency
iteration.},
}