The Volume of the Giant Component of a Random Graph with Given Expected Degrees

  • Authors:
  • Fan Chung;Linyuan Lu

  • Affiliations:
  • -;-

  • Venue:
  • SIAM Journal on Discrete Mathematics
  • Year:
  • 2006

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Abstract

We consider the random graph model $G(\mathbf{w})$ for a given expected degree sequence ${\mathbf w} =(w_1, w_2, \ldots, w_n)$. If the expected average degree is strictly greater than $1$, then almost surely the giant component in $G$ of $G({\mathbf w})$ has volume (i.e., sum of weights of vertices in the giant component) equal to $\lambda_0 {\rm Vol}(G) + O(\sqrt{n}\log^{3.5} n)$, where $\lambda_0$ is the unique nonzero root of the equation \[ \sum_{i=1}^n w_i e^{-w_i\lambda} = (1-\lambda) \sum_{i=1}^n w_i, \] and where ${\rm Vol}(G)=\sum_i w_i.$