30 search results - page 3 / 6 » Approximating Rooted Connectivity Augmentation Problems |
ESA
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. We present new approximation schemes for various classical problems of finding the minimum-weight spanning subgraph in edge-weighted undirected planar graphs that are re...
MFCS
2007
Springer
14 years 1 months ago
2007
Springer
Consider a rooted directed acyclic graph G = (V, E) with root r, representing a collection V of web pages connected via a set E of hyperlinks. Each node v is associated with the pr...
STOC
2007
ACM
14 years 7 months ago
2007
ACM
We demonstrate an average-case problem that is as hard as finding (n)-approximate shortest vectors in certain n-dimensional lattices in the worst case, where (n) = O( log n). The...
ESA
2004
Springer
14 years 25 days ago
2004
Springer
Let G = (V, E) be an undirected multi-graph with a special vertex root ∈ V , and where each edge e ∈ E is endowed with a length l(e) ≥ 0 and a capacity c(e) > 0. For a pa...
SIAMCOMP
2008
13 years 7 months ago
2008
We develop approximation algorithms for the problem of placing replicated data in arbitrary networks, where the nodes may both issue requests for data objects and have capacity fo...