119 search results - page 7 / 24 » Linear-Time Algorithms for Parametric Minimum Spanning Tree ... |
SODA
2010
ACM
14 years 4 months ago
2010
ACM
We observe that the classical maximum flow problem in any directed planar graph G can be reformulated as a parametric shortest path problem in the oriented dual graph G . This ref...
FSTTCS
2000
Springer
13 years 11 months ago
2000
Springer
Abstract. We describe some new, simple and apparently general methods for designing FPT algorithms, and illustrate how these can be used to obtain a signi cantly improved FPT algor...
FOCS
1996
IEEE
13 years 11 months 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...
STOC
1995
ACM
13 years 11 months ago
1995
ACM
We relate the sequence of minimum bases of a matroid with linearly varying weights to three problems from combinatorial geometry: k-sets, lower envelopes of line segments, and con...
CATS
1998
13 years 8 months ago
1998
Let G(V, E) be a weighted, undirected, connected simple graph with n vertices and m edges. The k most vital edge problem with respect to minimum spanning trees is to find a set S o...