Explicit OR-dispersers with polylogarithmic degree.

An (N, M, T)-OR-disperser is a bipartite multigraph G=(V, W, E) with |V| = N, and |W| = M, having the following expansion property: any subset of V having at least T vertices has a neighbor set of size at least M/2. For any pair of constants &xgr;, &lgr;, 1 ≥ &xgr; > &lgr; ≥ 0, an...

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Опубликовано в::	Journal of the ACM 45, 1 (1998).
Главный автор:	Saks, Michael
Формат:	Статья
Язык:	English
Предметы:	Theory of computation. Computation by abstract devices. Complexity measures and classes. Relations among complexity classes. Mathematics of computing. Discrete mathematics. Combinatorics. Combinatorial algorithms. Probability and statistics. Probabilistic algorithms (including Monte Carlo). Algorithms. Theory.