Convergence law for random graphs with specified degree sequence

  • Authors:
  • James F. Lynch

  • Affiliations:
  • Clarkson University, Potsdam, NY

  • Venue:
  • ACM Transactions on Computational Logic (TOCL)
  • Year:
  • 2005

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Abstract

The degree sequence of an n-vertex graph is d0,…,dn−1, where each di is the number of vertices of degree i in the graph. A random graph with degree sequence d0,…,dn−1 is a randomly selected member of the set of graphs on {1,…,n} with that degree sequence, all choices being equally likely. Let λ0,λ1,… be a sequence of nonnegative reals summing to 1. A class of finite graphs has degree sequences approximated by λ0,λ1,… if, for every i and n, the members of the class of size n have λi n + o(n) vertices of degree i. Our main result is a convergence law for random graphs with degree sequences approximated by some sequence λ0,λ1,…. With certain conditions on the sequence λ0,λ1,…, the probability of any first-order sentence on random graphs of size n converges to a limit as n grows.