29 search results - page 1 / 6 » Skew partitions in perfect graphs |
DAM
2008
13 years 5 months ago
2008
We discuss some new and old results about skew partitions in perfect graphs.
COMBINATORICA
2006
13 years 5 months ago
2006
In this paper we show that, if G is a Berge graph such that neither G nor its complement G contains certain induced subgraphs, named proper wheels and long prisms, then either G i...
JCT
2008
13 years 5 months ago
2008
A hole in a graph is an induced cycle on at least four vertices. A graph is Berge if it has no odd hole and if its complement has no odd hole. In 2002, Chudnovsky, Robertson, Seym...
SIAMDM
2000
13 years 4 months ago
2000
A graph is a split graph if its vertices can be partitioned into a clique and a stable set. A graph is a k-split graph if its vertices can be partitioned into k sets, each of which...
ISAAC
2007
Springer
13 years 11 months ago
2007
Springer
Valiant introduced some 25 years ago an algebraic model of computation along with the complexity classes VP and VNP, which can be viewed as analogues of the classical classes P and...