783 search results - page 18 / 157 » Improved approximation algorithms for the freeze-tag problem |
FOCS
2009
IEEE
14 years 3 months ago
2009
IEEE
We show that a k-fold covering using translates of an arbitrary convex polygon can be decomposed into Omega(k) covers (using an efficient algorithm). We generalize this result to ...
FOCS
2009
IEEE
14 years 3 months ago
2009
IEEE
Abstract— A number of recent results on optimization problems involving submodular functions have made use of the ”multilinear relaxation” of the problem [3], [8], [24], [14]...
APPROX
2010
Springer
13 years 10 months ago
2010
Springer
Abstract. We provide improved approximation algorithms for the minmax generalization problems considered by Du, Eppstein, Goodrich, and Lueker [1]. In min-max generalization proble...
IPCO
1993
13 years 10 months ago
1993
The survivable network design problem (SNDP) is to construct a minimum-cost subgraph satisfying certain given edge-connectivity requirements. The first polynomial-time approximati...
ESA
2003
Springer
14 years 1 months ago
2003
Springer
We prove that various geometric covering problems, related to the Travelling Salesman Problem cannot be efficiently approximated to within any constant factor unless P = NP. This ...