91 search results - page 5 / 19 » Finding Independent Sets in Unions of Perfect Graphs |
DAM
2011
13 years 2 months ago
2011
We study various optimization problems in t-subtree graphs, the intersection graphs of tsubtrees, where a t-subtree is the union of t disjoint subtrees of some tree. This graph cl...
DAM
2008
13 years 7 months ago
2008
Polar graphs are a natural extension of some classes of graphs like bipartite graphs, split graphs and complements of bipartite graphs. A graph is (s, k)-polar if there exists a pa...
ALGORITHMICA
2010
13 years 7 months ago
2010
We divide a string into k segments, each with only one sort of symbols, so as to minimize the total number of exceptions. Motivations come from machine learning and data mining. F...
ICALP
2009
Springer
14 years 7 months ago
2009
Springer
Abstract. This paper deals with approximations of maximum independent sets in non-uniform hypergraphs of low degree. We obtain the first performance ratio that is sublinear in term...
SODA
2004
ACM
13 years 9 months ago
2004
ACM
We consider the problem of finding a sparse set of edges containing the minimum spanning tree (MST) of a random subgraph of G with high probability. The two random models that we ...