Coloring complete bipartite graphs from random lists

  • Authors:
  • Michael Krivelevich;Asaf Nachmias

  • Affiliations:
  • Department of Mathematics, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel;Department of Mathematics, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel

  • Venue:
  • Random Structures & Algorithms
  • Year:
  • 2006

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Abstract

Let Kn,n be the complete bipartite graph with n vertices in each side. For each vertex draw uniformly at random a list of size k from a base set S of size s = s(n). In this paper we estimate the asymptotic probability of the existence of a proper coloring from the random lists for all fixed values of k and growing n. We show that this property exhibits a sharp threshold for k ≥ 2 and the location of the threshold is precisely s(n) = 2n for k = 2 and approximately $s(n)={{n}\over{2^{k-1}\ln 2}}$ for k ≥ 3. © 2005 Wiley Periodicals, Inc. Random Struct. Alg., 2006