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» Improved Results on Geometric Hitting Set Problems
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ICTCS
2005
Springer
14 years 1 months ago
Improved Exact Exponential Algorithms for Vertex Bipartization and Other Problems
Abstract. We study efficient exact algorithms for several problems including Vertex Bipartization, Feedback Vertex Set, 3-Hitting Set, Max Cut in graphs with maximum degree at most...
Venkatesh Raman, Saket Saurabh, Somnath Sikdar
COCOA
2008
Springer
13 years 9 months ago
Multiple Hypernode Hitting Sets and Smallest Two-Cores with Targets
The multiple weighted hitting set problem is to find a subset of nodes in a hypergraph that hits every hyperedge in at least m nodes. We extend the problem to a notion of hypergra...
Peter Damaschke
TON
1998
103views more  TON 1998»
13 years 7 months ago
Using name-based mappings to increase hit rates
—Clusters of identical intermediate servers are often created to improve availability and robustness in many domains. The use of proxy servers for the World Wide Web (WWW) and of...
David Thaler, Chinya V. Ravishankar
ECCC
2010
111views more  ECCC 2010»
13 years 7 months ago
Tight Bounds on the Approximability of Almost-satisfiable Horn SAT and Exact Hitting Set}
We study the approximability of two natural Boolean constraint satisfaction problems: Horn satisfiability and exact hitting set. Under the Unique Games conjecture, we prove the fo...
Venkatesan Guruswami, Yuan Zhou
STOC
2010
ACM
245views Algorithms» more  STOC 2010»
14 years 16 days ago
Weighted Geometric Set Cover via Quasi-Uniform Sampling
There has been much progress on geometric set cover problems, but most known techniques only apply to the unweighted setting. For the weighted setting, very few results are known ...
Kasturi Varadarajan