354 search results - page 26 / 71 » The Chromatic Number Of Graph Powers |
CORR
2011
Springer
14 years 4 months ago
2011
Springer
An acyclic coloring of a graph is a proper vertex coloring such that the union of any two color classes induces a disjoint collection of trees. The more restricted notion of star ...
107
click to vote
CIAC
2010
Springer
15 years 28 days ago
2010
Springer
We investigate the relationship between two kinds of vertex colorings of graphs: uniquemaximum colorings and conflict-free colorings. In a unique-maximum coloring, the colors are ...
CORR
2010
Springer
14 years 9 months ago
2010
Springer
A b-coloring is a coloring of the vertices of a graph such that each color class contains a vertex that has a neighbor in all other color classes, and the b-chromatic number of a ...
83
Voted
DM
2006
14 years 9 months ago
2006
Let n(G) denote the number of vertices of a graph G and let (G) be the independence number of G, the maximum number of pairwise nonadjacent vertices of G. The Hall ratio of a grap...
FOCS
2002
IEEE
15 years 2 months ago
2002
IEEE
We prove that coloring a 3-uniform 2-colorable hypergraph with c colors is NP-hard for any constant c. The best known algorithm [20] colors such a graph using O(n1/5 ) colors. Our...