182 search results - page 3 / 37 » Extremal Problems For Transversals In Graphs With Bounded De... |
FOCS
2002
IEEE
13 years 9 months ago
2002
IEEE
We consider the problem of testing 3-colorability in the bounded-degree model. We show that, for small enough ε, every tester for 3colorability must have query complexity Ω(n)....
APPROX
2008
Springer
13 years 6 months ago
2008
Springer
We study approximation algorithms, integrality gaps, and hardness of approximation, of two problems related to cycles of "small" length k in a given graph. The instance f...
ALGORITHMICA
2004
13 years 4 months ago
2004
We consider the Chromatic Sum Problem on bipartite graphs which appears to be much harder than the classical Chromatic Number Problem. We prove that the Chromatic Sum Problem is NP...
ALGORITHMICA
2004
13 years 4 months ago
2004
We consider the problem of finding a minimum diameter spanning tree with maximum node degree B in a complete undirected edge-weighted graph. We provide an O( p logB n)-approximatio...
DAM
2006
13 years 4 months ago
2006
The connectivity index w(G) of a graph G is the sum of the weights (d(u)d(v)) of all edges uv of G, where is a real number ( = 0), and d(u) denotes the degree of the vertex u. Le...