Approximating Sparsest Cut in Graphs of Bounded Treewidth

Published 21 Jun 2010 in cs.DS | (1006.3970v2)

Abstract: We give the first constant-factor approximation algorithm for Sparsest Cut with general demands in bounded treewidth graphs. In contrast to previous algorithms, which rely on the flow-cut gap and/or metric embeddings, our approach exploits the Sherali-Adams hierarchy of linear programming relaxations.

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