18 search results - page 2 / 4 » Vertex Coverings by Coloured Induced Graphs - Frames and Umb... |
JGT
2006
13 years 7 months ago
2006
Following [1], we investigate the problem of covering a graph G with induced subgraphs G1, . . . , Gk of possibly smaller chromatic number, but such that for every vertex u of G, ...
ISAAC
2000
Springer
13 years 11 months ago
2000
Springer
It has been a challenging open problem whether there is a polynomial time approximation algorithm for the Vertex Cover problem whose approximation ratio is bounded by a constant l...
ICALP
2011
Springer
12 years 10 months ago
2011
Springer
In [13], Erd˝os et al. defined the local chromatic number of a graph as the minimum number of colors that must appear within distance 1 of a vertex. For any ∆ ≥ 2, there are ...
AICCSA
2007
IEEE
14 years 1 months ago
2007
IEEE
In the maximum common subgraph (MCS) problem, we are given a pair of graphs and asked to find the largest induced subgraph common to them both. With its plethora of applications,...
MST
2007
13 years 6 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...