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CIKM
2005
Springer
14 years 3 months ago
Concept-based interactive query expansion
Despite the recent advances in search quality, the fast increase in the size of the Web collection has introduced new challenges for Web ranking algorithms. In fact, there are sti...
Bruno M. Fonseca, Paulo Braz Golgher, Bruno P&ocir...
ESA
2004
Springer
129views Algorithms» more  ESA 2004»
14 years 3 months ago
Contraction and Treewidth Lower Bounds
Edge contraction is shown to be a useful mechanism to improve lower bound heuristics for treewidth. A successful lower bound for treewidth is the degeneracy: the maximum over all ...
Hans L. Bodlaender, Arie M. C. A. Koster, Thomas W...
COCO
2000
Springer
65views Algorithms» more  COCO 2000»
14 years 2 months ago
On the Complexity of Quantum ACC
For any q > 1, let MODq be a quantum gate that determines if the number of 1’s in the input is divisible by q. We show that for any q, t > 1, MODq is equivalent to MODt (u...
Frederic Green, Steven Homer, Chris Pollett
LCC
1994
248views Algorithms» more  LCC 1994»
14 years 2 months ago
Comparing the Power of Monadic NP Games
The descriptive complexity of a problem is the complexity of describing the problem in some logical formalism. One of the few techniques for proving separation results in descripti...
Ronald Fagin
CHARME
2003
Springer
110views Hardware» more  CHARME 2003»
14 years 1 months ago
Exact and Efficient Verification of Parameterized Cache Coherence Protocols
Abstract. We propose new, tractably (in some cases provably) efficient algorithmic methods for exact (sound and complete) parameterized reasoning about cache coherence protocols. F...
E. Allen Emerson, Vineet Kahlon