219 search results - page 27 / 44 » A Better Approximation Ratio for the Vertex Cover Problem |
PPAM
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorit...
SECON
2008
IEEE
14 years 1 months ago
2008
IEEE
Abstract—In contrast to existing work on the connected coverage problem in wireless sensor networks which assumes omnidirectional sensors with disk-like sensing range, this paper...
JCB
2007
13 years 7 months ago
2007
In this paper, we study the problem of computing the similarity of two protein structures ring their contact-map overlap. Contact-map overlap abstracts the problem of computing th...
TCS
2010
13 years 5 months ago
2010
It is well known that the two simple algorithms for the classic bin packing problem, NF and WF both have an approximation ratio of 2. However, WF seems to be a more reasonable alg...
FOCS
2008
IEEE
14 years 2 months ago
2008
IEEE
We show that for k ≥ 3 even the Ω(n) level of the Lasserre hierarchy cannot disprove a random k-CSP instance over any predicate type implied by k-XOR constraints, for example ...