22 search results - page 2 / 5 » Properties of vertex cover obstructions |
MST
2007
13 years 4 months ago
2007
Crown structures in a graph are defined and shown to be useful in kernelization algorithms for the classic vertex cover problem. Two vertex cover kernelization methods are discus...
STOC
2003
ACM
13 years 10 months ago
2003
ACM
Given a k-uniform hypergraph, the Ek-Vertex-Cover problem is to find the smallest subset of vertices that intersects every hyperedge. We present a new multilayered PCP constructi...
ICALP
2010
Springer
13 years 10 months ago
2010
Springer
Computing a minimum vertex cover in graphs and hypergraphs is a well-studied optimizaton problem. While intractable in general, it is well known that on bipartite graphs, vertex c...
MOR
2010
13 years 3 months ago
2010
We consider the mixed integer version of bipartite vertex cover. This is equivalent to the mixed integer network dual model, recently introduced in [2], that generalizes several m...
ISAAC
2005
Springer
13 years 10 months ago
2005
Springer
Let G be a graph with a nonnegative integral function w defined on V (G). A collection F of subsets of V (G) (repetition is allowed) is called a feedback vertex set packing in G ...