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» The Complexity of Polynomial-Time Approximation
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STOC
2006
ACM
112views Algorithms» more  STOC 2006»
14 years 8 months ago
A quasi-PTAS for unsplittable flow on line graphs
We study the Unsplittable Flow Problem (UFP) on a line graph, focusing on the long-standing open question of whether the problem is APX-hard. We describe a deterministic quasi-pol...
Nikhil Bansal, Amit Chakrabarti, Amir Epstein, Bar...
STOC
1998
ACM
89views Algorithms» more  STOC 1998»
13 years 12 months ago
Minimizing Stall Time in Single and Parallel Disk Systems
We study integrated prefetching and caching problems following the work of Cao et. al. [3] and Kimbrel and Karlin [13]. Cao et. al. and Kimbrel and Karlin gave approximation algor...
Susanne Albers, Naveen Garg, Stefano Leonardi
SODA
2012
ACM
185views Algorithms» more  SODA 2012»
11 years 10 months ago
On a linear program for minimum-weight triangulation
ABSTRACT∗ Arman Yousefi† Neal E. Young‡ Minimum-weight triangulation (MWT) is NP-hard. It has a polynomial-time constant-factor approximation algorithm, and a variety of e...
Arman Yousefi, Neal E. Young
INFOCOM
2008
IEEE
14 years 2 months ago
On the Construction of a Maximum-Lifetime Data Gathering Tree in Sensor Networks: NP-Completeness and Approximation Algorithm
Abstract—Energy efficiency is critical for wireless sensor networks. The data gathering process must be carefully designed to conserve energy and extend the network lifetime. Fo...
Yan Wu, Sonia Fahmy, Ness B. Shroff
QEST
2008
IEEE
14 years 2 months ago
Approximate Analysis of Probabilistic Processes: Logic, Simulation and Games
We tackle the problem of non robustness of simulation and bisimulation when dealing with probabilistic processes. It is important to ignore tiny deviations in probabilities becaus...
Josée Desharnais, François Laviolett...