[PDF][PDF] Improved algorithms for unique games via divide and conquer

S Arora, R Impagliazzo, W Matthews…�- Electron. Colloq. on�…, 2010 - researchgate.net
Electron. Colloq. on Comput. Complexity (ECCC), 2010researchgate.net
We present two new approximation algorithms for Unique Games. The first generalizes the
results of [2, 15] who give polynomial time approximation algorithms for graphs with high
conductance. We give a polynomial time algorithm assuming only good local conductance,
ie high conductance for small subgraphs. The second algorithm runs in mildly exponential
time, eαn, but makes no assumptions about the underlying constraint graph. As the
completeness approaches 1 (completeness 1− ϵ), the constant α in the running time rapidly�…
Abstract
We present two new approximation algorithms for Unique Games. The first generalizes the results of [2, 15] who give polynomial time approximation algorithms for graphs with high conductance. We give a polynomial time algorithm assuming only good local conductance, ie high conductance for small subgraphs. The second algorithm runs in mildly exponential time, eαn, but makes no assumptions about the underlying constraint graph. As the completeness approaches 1 (completeness 1− ϵ), the constant α in the running time rapidly approaches 0 (α= exp (− Ω (1/ϵ)).) The value of the solutions returned by these algorithms depend only on the completeness of the Unique Game and either the local conductance or the allowed running time respectively. In particular, the performance of these algorithms does not depend on the number of labels in the Unique Game.
researchgate.net
Showing the best result for this search. See all results