540 search results - page 18 / 108 » New bounds on the edge number of a k-map graph |
IWOCA
2009
Springer
14 years 2 months ago
2009
Springer
: We present an improved upper bound of O(d1+ 1 m−1 ) for the (2, F)-subgraph chromatic number χ2,F (G) of any graph G of maximum degree d. Here, m denotes the minimum number of...
CORR
2008
Springer
13 years 7 months ago
2008
Springer
In MaxSat, we ask for an assignment which satisfies the maximum number of clauses for a boolean formula in CNF. We present an algorithm yielding a run time upper bound of O (2 K 6....
COCOON
2008
Springer
13 years 9 months ago
2008
Springer
In this paper, we consider a new visual cryptography scheme that allows for sharing of multiple secret images on graphs: we are given an arbitrary graph (V, E) where every node an...
CORR
2010
Springer
13 years 7 months ago
2010
Springer
The oriented chromatic number of an oriented graph G is the minimum order of an oriented graph H such that G admits a homomorphism to H. The oriented chromatic number of an undire...
MFCS
2004
Springer
14 years 29 days ago
2004
Springer
Abstract. Bidimensionality provides a tool for developing subexponential fixed-parameter algorithms for combinatorial optimization problems on graph families that exclude a minor....