55 search results - page 1 / 11 » A class of perfectly contractile graphs |
JCT
2006
13 years 4 months ago
2006
We consider the class A of graphs that contain no odd hole, no antihole, and no "prism" (a graph consisting of two disjoint triangles with three disjoint paths between th...
SIAMDM
2008
13 years 4 months ago
2008
We consider the class of graphs that contain no bull, no odd hole, and no antihole of length at least five. We present a new algorithm that colors optimally the vertices of every g...
GC
2007
Springer
13 years 4 months ago
2007
Springer
The pre-coloring extension problem consists, given a graph G and a set of nodes to which some colors are already assigned, in finding a coloring of G with the minimum number of co...
DM
1998
13 years 4 months ago
1998
Let β(G), Γ(G) and IR(G) be the independence number, the upper domination number and the upper irredundance number, respectively. A graph G is called Γperfect if β(H) = Γ(H),...
COCO
2010
Springer
13 years 2 months ago
2010
Springer
An even cycle in a graph is called nice by Lov