172 search results - page 1 / 35 » Improved approximation for directed cut problems |
STOC
2007
ACM
14 years 5 months ago
2007
ACM
ICALP
2005
Springer
13 years 10 months ago
2005
Springer
We reduce the approximation factor for Vertex Cover to 2 − Θ( 1√ log n ) (instead of the previous 2 − Θ(log log n log n ), obtained by Bar-Yehuda and Even [2], and by Moni...
STOC
1998
ACM
13 years 9 months ago
1998
ACM
Given an undirected graph with edge costs and a subset of k nodes called terminals, a multiway cut is a subset of edges whose removal disconnects each terminal from the rest. Mult...
TAMC
2009
Springer
13 years 11 months ago
2009
Springer
We investigate a natural combinatorial optimization problem called the Label Cut problem. Given an input graph G with a source s and a sink t, the edges of G are classified into ...
ICALP
2011
Springer
12 years 8 months ago
2011
Springer
We present an O( √ n log n)-approximation algorithm for the problem of finding the sparsest spanner of a given directed graph G on n vertices. A spanner of a graph is a sparse ...