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» Approximation algorithms for the 0-extension problem
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OL
2008
82views more  OL 2008»
13 years 4 months ago
An approximation algorithm for network design problems with downwards-monotone demand functions
Building on an existing 2-approximate algorithm for the class of network design problems with downwards-monotone demand functions, many of which are NP-hard, we present an algorith...
Michael Laszlo, Sumitra Mukherjee
JCSS
2002
199views more  JCSS 2002»
13 years 5 months ago
A Constant-Factor Approximation Algorithm for the k-Median Problem
We present the first constant-factor approximation algorithm for the metric k-median problem. The k-median problem is one of the most well-studied clustering problems, i.e., those...
Moses Charikar, Sudipto Guha, Éva Tardos, D...
JCSS
2010
155views more  JCSS 2010»
13 years 3 months ago
Approximation and fixed-parameter algorithms for consecutive ones submatrix problems
We develop an algorithmically useful refinement of a forbidden submatrix characterization of 0/1-matrices fulfilling the Consecutive Ones Property (C1P). This characterization ...
Michael Dom, Jiong Guo, Rolf Niedermeier
SODA
2012
ACM
297views Algorithms» more  SODA 2012»
11 years 7 months ago
Constant factor approximation algorithm for the knapsack median problem
We give a constant factor approximation algorithm for the following generalization of the k-median problem. We are given a set of clients and facilities in a metric space. Each fa...
Amit Kumar
JGAA
2000
179views more  JGAA 2000»
13 years 5 months ago
Approximation Algorithms for Some Graph Partitioning Problems
This paper considers problems of the following type: given an edgeweighted k-colored input graph with maximum color class size c, find a minimum or maximum c-way cut such that eac...
George He, Jiping Liu, Cheng Zhao