783 search results - page 39 / 157 » Improved approximation algorithms for the freeze-tag problem |
126
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TALG
2008
15 years 5 months ago
2008
In this paper, we study the metrics of negative type, which are metrics (V, d) such that d is an Euclidean metric; these metrics are thus also known as " 2-squared" met...
133
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DAM
2007
15 years 5 months ago
2007
We give a short proof of a result of Tovey [6] on the inapproximability of a scheduling problem known as precedence constrained class sequencing. In addition, we present an approxi...
156
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CCCG
2010
15 years 7 months ago
2010
In the Euclidean TSP with neighborhoods (TSPN), we are given a collection of n regions (neighborhoods) and we seek a shortest tour that visits each region. In the path variant, we...
159
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STOC
2003
ACM
16 years 5 months ago
2003
ACM
In this paper, we show that any n point metric space can be embedded into a distribution over dominating tree metrics such that the expected stretch of any edge is O(log n). This ...
147
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ESA
2006
Springer
15 years 9 months ago
2006
Springer
The objective of this paper is to characterize classes of problems for which a greedy algorithm finds solutions provably close to optimum. To that end, we introduce the notion of k...