Building uniformly random subtrees

  • Authors:
  • Malwina Luczak;Peter Winkler

  • Affiliations:
  • Department of Mathematics, London School of Economics, Houghton Street, London WC2A 2AE, United Kingdom;Bell Labs 2C-365, Lucent Technologies, 700 Mountain Avenue, Murray Hill, New Jersey 07974

  • Venue:
  • Random Structures & Algorithms - Isaac Newton Institute Programme “Computation, Combinatorics and Probability”: Part II
  • Year:
  • 2004

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Abstract

We prove the existence of, and describe, a (random) process which builds subtrees of a rooted d-branching tree one node at a time, in such a way that the subtree created at stage n is precisely a uniformly random subtree of size n. The union of these subtrees is a “uniformly random” infinite subtree, which we describe and generate in several ways. Generalization to generation of other combinatorial structures is also considered. © 2004 Wiley Periodicals, Inc. Random Struct. Alg., 2004