226 search results - page 20 / 46 » Lower bounds on the obstacle number of graphs |
DAM
2010
13 years 8 months ago
2010
An equivalence graph is a disjoint union of cliques, and the equivalence number eq(G) of a graph G is the minimum number of equivalence subgraphs needed to cover the edges of G. W...
MST
2002
13 years 7 months ago
2002
We study the average number of delays suffered by packets routed using greedy (work conserving) scheduling policies. We obtain tight bounds on the worst-case average number of del...
PODS
1993
ACM
13 years 12 months ago
1993
ACM
In this paper we consider the problem of using disk blocks efficiently in searching graphs that are too large to fit in internal memory. Our model allows a vertex to be represented...
INFOCOM
2011
IEEE
12 years 11 months ago
2011
IEEE
—It is well-known that the application of directional antennas can help conserve bandwidth and energy consumption in wireless networks. Thus, to achieve efficiency in wireless n...
COMBINATORICS
2000
13 years 7 months ago
2000
The set R of relevant cycles of a graph G is the union of its minimum cycle bases. We introduce a partition of R such that each cycle in a class W can be expressed as a sum of oth...