153 search results - page 7 / 31 » Near-linear approximation algorithms for geometric hitting s... |
151
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IJFCS
2006
15 years 5 months ago
2006
We initiate a systematic study of the Row Deletion(B) problem on matrices: Given an input matrix A and a fixed "forbidden submatrix" B, the task is to remove a minimum n...
154
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ISAAC
2004
Springer
15 years 10 months ago
2004
Springer
Abstract. We study the problem of maintaining a (1+ )-factor approximation of the diameter of a stream of points under the sliding window model. In one dimension, we give a simple ...
102
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CCCG
2010
15 years 6 months ago
2010
We obtain hardness results and approximation algorithms for two related geometric problems involving movement. The first is a constrained variant of the k-center problem, arising ...
175
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SIAMCOMP
1998
15 years 4 months ago
1998
Motivated by applications in computer graphics, visualization, and scienti c computation, we study the computational complexity of the following problem: Given a set S of n points...
151
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WAW
2007
Springer
15 years 11 months ago
2007
Springer
Abstract. This paper describes a technique for reducing the querytime cost of HITS-like ranking algorithm. The basic idea is to compute for each node in the web graph a summary of ...