Subgraphs of dense random graphs with specified degrees

  • Authors:
  • Brendan d. Mckay

  • Affiliations:
  • School of computer science, australian national university, canberra act 0200, australia (e-mail: bdm@cs.anu.edu.au)

  • Venue:
  • Combinatorics, Probability and Computing
  • Year:
  • 2011

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Abstract

Let d = (d1, d2,. . ., dn) be a vector of non-negative integers with even sum. We prove some basic facts about the structure of a random graph with degree sequence d, including the probability of a given subgraph or induced subgraph. Although there are many results of this kind, they are restricted to the sparse case with only a few exceptions. Our focus is instead on the case where the average degree is approximately a constant fraction of n. Our approach is the multidimensional saddle-point method. This extends the enumerative work of McKay and Wormald (1990) and is analogous to the theory developed for bipartite graphs by Greenhill and McKay (2009).