GC
2008
Springer
13 years 11 months ago
2008
Springer
An acyclic coloring of a graph G is a proper coloring of the vertex set of G such that G contains no bichromatic cycles. The acyclic chromatic number of a graph G is the minimum nu...
IWPEC
2004
Springer
14 years 4 months ago
2004
Springer
In the precoloring extension problem (PrExt) a graph is given with some of the vertices having a preassigned color and it has to be decided whether this coloring can be extended to...
COCOA
2007
Springer
14 years 5 months ago
2007
Springer
Abstract. We study the complexity of several coloring problems on graphs, parameterized by the treewidth t of the graph: (1) The list chromatic number χl(G) of a graph G is defin...