Date of Original Version

7-2010

Type

Conference Proceeding

Abstract or Description

In this paper we present semidefinite programming (SDP) gap instances for the following variants of the Label-Cover problem, closely related to the Unique Games Conjecture: (i) 2-to-1 Label-Cover; (ii) 2-to-2 Label-Cover; (iii) α-constraint Label-Cover. All of our gap instances have perfect SDP solutions. For alphabet size K, the integral optimal solutions have value: (i) O(1/√log K}); (ii) O(1/logK); (iii) O(1/√log K})

DOI

10.1007/978-3-642-14165-2_52

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