Authors
Lorenzo Orecchia, Leonard J Schulman, Umesh V Vazirani, Nisheeth K Vishnoi
Publication date
2008/5/17
Book
Proceedings of the fortieth annual ACM symposium on Theory of computing
Pages
461-470
Description
In this paper we obtain improved upper and lower bounds for the best approximation factor for Sparsest Cut achievable in the cut-matching game framework proposed in Khandekar et al. [9]. We show that this simple framework can be used to design combinatorial algorithms that achieve O(log n) approximation factor and whose running time is dominated by a poly-logarithmic number of single-commodity max-flow computations. This matches the performance of the algorithm of Arora and Kale [2]. Moreover, we also show that it is impossible to get an approximation factor of better than Ω(√log n) in the cut-matching game framework. These results suggest that the simple and concrete abstraction of the cut-matching game may be powerful enough to capture the essential features of the complexity of Sparsest Cut.
Total citations
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Scholar articles
L Orecchia, LJ Schulman, UV Vazirani, NK Vishnoi - Proceedings of the fortieth annual ACM symposium on …, 2008