275 search results - page 18 / 55 » Bounding the Number of Edges in Permutation Graphs |
COMBINATORICA
2007
13 years 8 months ago
2007
The main result of this paper is that every 4-uniform hypergraph on n vertices and m edges has a transversal with no more than (5n + 4m)/21 vertices. In the particular case n = m,...
SSS
2010
Springer
13 years 6 months ago
2010
Springer
We consider the question of how much information can be stored by labeling the vertices of a connected undirected graph G using a constant-size set of labels, when isomorphic label...
JDA
2006
13 years 8 months ago
2006
Assume that each vertex of a graph G is assigned a nonnegative integer weight and that l and u are nonnegative integers. One wishes to partition G into connected components by del...
APPROX
2009
Springer
14 years 3 months ago
2009
Springer
We consider adding k shortcut edges (i.e. edges of small fixed length δ ≥ 0) to a graph so as to minimize the weighted average shortest path distance over all pairs of vertices...
GBRPR
2003
Springer
14 years 1 months ago
2003
Springer
Abstract. We present a new method (MIDES) to determine contraction kernels for the construction of graph pyramids. Experimentally the new method has a reduction factor higher than ...