743 search results - page 61 / 149 » Approximation Algorithms for Graph Homomorphism Problems |
FSTTCS
2001
Springer
14 years 11 days ago
2001
Springer
Consider a directed graph G = (V, E) with n vertices and a root vertex r ∈ V . The DMDST problem for G is one of constructing a spanning tree rooted at r, whose maximal degree is...
PDCAT
2005
Springer
14 years 1 months ago
2005
Springer
We consider the practical NP-complete problem of finding a minimum weight spanning tree with both edge weights and inner nodes weights. We present two polynomial time algorithms ...
FOCS
1996
IEEE
14 years 1 days ago
1996
IEEE
In thispaper we give a 3-approximationalgorithmfor the problem ojJnding a minimum tree spanning any k-vertices in a graph. Our algorithm extends to a 3-approximationalgorithmfor t...
DCG
2010
13 years 8 months ago
2010
We consider the well known geometric problem of determining shortest paths between pairs of points on a polyhedral surface P, where P consists of triangular faces with positive we...
ESA
2005
Springer
14 years 1 months ago
2005
Springer
We introduce the Minimum-size bounded-capacity cut (MinSBCC) problem, in which we are given a graph with an identified source and seek to find a cut minimizing the number of node...