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ORL
2010
59views more  ORL 2010»
13 years 4 months ago
Minimizing the sum of weighted completion times in a concurrent open shop
Monaldo Mastrolilli, Maurice Queyranne, Andreas S....
APPROX
2006
Springer
124views Algorithms» more  APPROX 2006»
13 years 10 months ago
Combinatorial Algorithms for Data Migration to Minimize Average Completion Time
The data migration problem is to compute an efficient plan for moving data stored on devices in a network from one configuration to another. It is modeled by a transfer graph, wher...
Rajiv Gandhi, Julián Mestre
MOR
2000
90views more  MOR 2000»
13 years 6 months ago
A PTAS for Minimizing the Total Weighted Completion Time on Identical Parallel Machines
We consider the problem of scheduling a set of n jobs on m identical parallel machines so as to minimize the weighted sum of job completion times. This problem is NP-hard in the s...
Martin Skutella, Gerhard J. Woeginger
ICALP
2010
Springer
13 years 11 months ago
Inapproximability of Hypergraph Vertex Cover and Applications to Scheduling Problems
Assuming the Unique Games Conjecture (UGC), we show optimal inapproximability results for two classic scheduling problems. We obtain a hardness of 2 − ε for the problem of mini...
Nikhil Bansal, Subhash Khot
ICALP
2009
Springer
14 years 6 months ago
Improved Bounds for Flow Shop Scheduling
We resolve an open question raised by Feige & Scheideler by showing that the best known approximation algorithm for flow shops is essentially tight with respect to the used low...
Monaldo Mastrolilli, Ola Svensson