53 search results - page 3 / 11 » Bounds on the forcing numbers of bipartite graphs |
ARSCOM
2006
13 years 7 months ago
2006
ABSTRACT. The Levi graph of a balanced incomplete block design is the bipartite graph whose vertices are the points and blocks of the design, with each block adjacent to those poin...
CORR
2011
Springer
13 years 2 months ago
2011
Springer
We study frequency allocation in wireless networks. A wireless network is modeled by an undirected graph, with vertices corresponding to cells. In each vertex we have a certain nu...
IPL
2002
13 years 7 months ago
2002
The barycenter heuristic is often used to solve the NP-hard two-layer edge crossing minimization problem. It is well-known that the barycenter heuristic can give solutions as bad a...
DM
2010
13 years 7 months ago
2010
A set of vertices D of a graph G is geodetic if every vertex of G lies on a shortest path between two not necessarily distinct vertices in D. The geodetic number of G is the minimu...
STACS
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. The perfect matching problem is known to be in ¶, in randomized NC, and it is hard for NL. Whether the perfect matching problem is in NC is one of the most prominent ope...