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» The Guarding Problem - Complexity and Approximation
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CIAC
2003
Springer
142views Algorithms» more  CIAC 2003»
14 years 14 days ago
Differential Approximation for Some Routing Problems
We study vehicle routing problems with constraints on the distance traveled by each vehicle or on the number of vehicles. The objective is to minimize the total distance traveled b...
Cristina Bazgan, Refael Hassin, Jérôm...
DAM
2006
191views more  DAM 2006»
13 years 8 months ago
Approximating the minimum clique cover and other hard problems in subtree filament graphs
Subtree filament graphs are the intersection graphs of subtree filaments in a tree. This class of graphs contains subtree overlap graphs, interval filament graphs, chordal graphs,...
J. Mark Keil, Lorna Stewart
ESA
2004
Springer
125views Algorithms» more  ESA 2004»
14 years 2 months ago
Approximation Algorithms for Quickest Spanning Tree Problems
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...
Refael Hassin, Asaf Levin
JDA
2007
129views more  JDA 2007»
13 years 8 months ago
Approximating the k-traveling repairman problem with repairtimes
Given an undirected graph G = (V,E) and a source vertex s ∈ V , the k-traveling repairman (KTR) problem, also known as the minimum latency problem, asks for k tours, each starti...
Raja Jothi, Balaji Raghavachari
STOC
2003
ACM
140views Algorithms» more  STOC 2003»
14 years 9 months ago
Approximation schemes for clustering problems
We present a general approach for designing approximation algorithms for a fundamental class of geometric clustering problems in arbitrary dimensions. More specifically, our appro...
Wenceslas Fernandez de la Vega, Marek Karpinski, C...