The width of random subsets of boolean lattices

  • Authors:
  • Y. Kohayakawa;B. Kreuter

  • Affiliations:
  • Instituto de Matemática e Estatística, Universidade de São Paulo, Rua do Matão 1010, 05508-090 São Paulo, Brazil;Institut für Informatik, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany

  • Venue:
  • Journal of Combinatorial Theory Series A
  • Year:
  • 2002

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Abstract

Suppose we toss an independent coin with probability of success p for each subset of [n] = { 1,..., n}, and form the random hypergraph P(n,p) by taking as hyperedges the subsets with successful coin tosses. We investigate the cardinality of the largest Sperner family contained in P(n,p). We obtain a sharp result for the range of p = p(n) in which this Sperner family has cardinality comparable to the cardinality of P(n,p).