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» Approximation Algorithms for Treewidth
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223
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DC
2011
14 years 3 months ago
Distributed algorithms for covering, packing and maximum weighted matching
Abstract This paper gives poly-logarithmic-round, distributed δ-approximation algorithms for covering problems with submodular cost and monotone covering constraints (Submodular-c...
Christos Koufogiannakis, Neal E. Young
143
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ESCAPE
2007
Springer
266views Algorithms» more  ESCAPE 2007»
15 years 10 months ago
CR-precis: A Deterministic Summary Structure for Update Data Streams
We present deterministic sub-linear space algorithms for a number of problems over update data streams, including, estimating frequencies of items and ranges, finding approximate ...
Sumit Ganguly, Anirban Majumder
122
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DISOPT
2006
118views more  DISOPT 2006»
15 years 3 months ago
Improved bounds for vehicle routing solutions
We present lower bounds for the vehicle routing problem (VRP) with and without split deliveries, improving the well known bound of Haimovich and Rinnooy Kan. These bounds are then...
Agustín Bompadre, Moshe Dror, James B. Orli...
127
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JPDC
2007
81views more  JPDC 2007»
15 years 3 months ago
Improved scheduling in rings
We study the problem of scheduling unit size jobs on n processors connected by a ring. We show a distributed algorithm for this problem with an approximation ratio of 3 2 + √ 2....
Dekel Tsur
117
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SIGMOD
2001
ACM
160views Database» more  SIGMOD 2001»
16 years 3 months ago
Adaptive Precision Setting for Cached Approximate Values
Caching approximate values instead of exact values presents an opportunity for performance gains in exchange for decreased precision. To maximize the performance improvement, cach...
Chris Olston, Boon Thau Loo, Jennifer Widom