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arXiv math/0107068math.PR

Random Electrical Networks on Complete Graphs II: Proofs

Geoffrey Grimmett, Harry Kesten

英文摘要:

This paper contains the proofs of Theorems 2 and 3 of the article entitled Random Electrical Networks on Complete Graphs, written by the same authors and published in the Journal of the London Mathematical Society, vol. 30 (1984), pp. 171-192. The current paper was written in 1983 but was not published in a journal, although its existence was announced in the LMS paper. This TeX version was created on 9 July 2001. It incorporates minor improvements to formatting and punctuation, but no change has been made to the mathematics. We study the effective electrical resistance of the complete graph $K_{n+2}$ when each edge is allocated a random resistance. These resistances are assumed independent with distribution $P(R=\infty)=1-n^{-1}γ(n)$, $P(R\le x) = n^{-1}γ(n)F(x)$ for $0\le x < \infty$, where $F$ is a fixed distribution function and $γ(n)\toγ\ge 0$ as $n\to\infty$. The asymptotic effective resistance between two chosen vertices is identified in the two cases $γ\le 1$ and $γ>1$, and the case $γ=\infty$ is considered. The analysis proceeds via detailed estimates based on the theory of branching processes.

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