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» The Complexity of Polynomial-Time Approximation
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AAAI
2004
13 years 11 months ago
Combinatorial Auctions with Structured Item Graphs
Combinatorial auctions (CAs) are important mechanisms for allocating interrelated items. Unfortunately, winner determination is NP-complete unless there is special structure. We s...
Vincent Conitzer, Jonathan Derryberry, Tuomas Sand...
IPL
2007
99views more  IPL 2007»
13 years 10 months ago
Substitutions into propositional tautologies
We prove that there is a polynomial time substitution (y1, . . . , yn) := g(x1, . . . , xk) with k << n such that whenever the substitution instance A(g(x1, . . . , xk)) of ...
Jan Krajícek
ECCC
2011
223views ECommerce» more  ECCC 2011»
13 years 5 months ago
A Case of Depth-3 Identity Testing, Sparse Factorization and Duality
Polynomial identity testing (PIT) problem is known to be challenging even for constant depth arithmetic circuits. In this work, we study the complexity of two special but natural ...
Chandan Saha, Ramprasad Saptharishi, Nitin Saxena
SODA
2010
ACM
187views Algorithms» more  SODA 2010»
14 years 7 months ago
An Improved Competitive Algorithm for Reordering Buffer Management
We design and analyze an on-line reordering buffer management algorithm with improved O log k log log k competitive ratio for non-uniform costs, where k is the buffer size. This i...
Noa Avigdor-Elgrabli, Yuval Rabani
ICALP
2009
Springer
14 years 4 months ago
Assigning Papers to Referees
Refereed conferences require every submission to be reviewed by members of a program committee (PC) in charge of selecting the conference program. There are many software packages...
Kurt Mehlhorn