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APPROX
2010
Springer
147views Algorithms» more  APPROX 2010»
13 years 8 months ago
Approximate Lasserre Integrality Gap for Unique Games
In this paper, we investigate whether a constant round Lasserre Semi-definite Programming (SDP) relaxation might give a good approximation to the UNIQUE GAMES problem. We show tha...
Subhash Khot, Preyas Popat, Rishi Saket
MICAI
2004
Springer
14 years 14 days ago
A Preprocessing That Combines Heuristic and Surrogate Constraint Analysis to Fix Variables in TSP
A preprocessing procedure that uses a local guided search defined in terms of a neighborhood structure to get a feasible solution (UB) and the Osorio and Glover[18, 20] exploiting ...
María Auxilio Osorio Lama, David Pinto
AI
2006
Springer
13 years 7 months ago
Cut-and-solve: An iterative search strategy for combinatorial optimization problems
Branch-and-bound and branch-and-cut use search trees to identify optimal solutions to combinatorial optimization problems. In this paper, we introduce an iterative search strategy...
Sharlee Climer, Weixiong Zhang
CDC
2010
IEEE
155views Control Systems» more  CDC 2010»
13 years 2 months ago
Relaxing LMI domination matricially
Given linear matrix inequalities (LMIs) L1 and L2 in the same number of variables it is natural to ask: (Q1) does one dominate the other, that is, does L1(X) 0 imply L2(X) 0? (Q2) ...
J. William Helton, Igor Klep, Scott A. McCullough
SODA
2010
ACM
155views Algorithms» more  SODA 2010»
14 years 4 months ago
A Space--Time Tradeoff for Permutation Problems
Many combinatorial problems--such as the traveling salesman, feedback arcset, cutwidth, and treewidth problem-can be formulated as finding a feasible permutation of n elements. Ty...
Mikko Koivisto, Pekka Parviainen