55 search results - page 7 / 11 » A class of perfectly contractile graphs |
SODA
2008
ACM
13 years 9 months ago
2008
ACM
We consider graph coloring problems where the cost of a coloring is the sum of the costs of the colors, and the cost of a color is a monotone concave function of the total weight ...
ICALP
2005
Springer
14 years 1 months ago
2005
Springer
Given a graph G = (V, E) and positive integral vertex weights w : V → N, the max-coloring problem seeks to find a proper vertex coloring of G whose color classes C1, C2, . . . ,...
COMBINATORICS
2006
13 years 7 months ago
2006
We present a variation of James Propp's generalized domino shuffling, which provides an efficient way to obtain perfect matchings of weighted Aztec diamonds. Our modification...
DAM
2008
13 years 7 months ago
2008
A clique-transversal of a graph G is a subset of vertices that meets all the cliques of G. A clique-independent set is a collection of pairwise vertex-disjoint cliques. The clique...
WG
2004
Springer
14 years 24 days ago
2004
Springer
In this paper, we consider the recognition problem on two classes of perfectly orderable graphs, namely, the HHD-free and the Welsh-Powell opposition graphs (or WPO-graphs). In par...