Joel Friedman 
Proof of Alon’s Second Eigenvalue Conjecture and Related Problems [PDF ebook] 

Destek

A $d$-regular graph has largest or first (adjacency matrix) eigenvalue $/lambda_1=d$. Consider for an even $d/ge 4$, a random $d$-regular graph model formed from $d/2$ uniform, independent permutations on $/{1, /ldots, n/}$. The author shows that for any $/epsilon>0$ all eigenvalues aside from $/lambda_1=d$ are bounded by $2/sqrt{d-1}/;+/epsilon$ with probability $1-O(n^{-/tau})$, where $/tau=/lceil /bigl(/sqrt{d-1}/;+1/bigr)/2 /rceil-1$. He also shows that this probability is at most $1-c/n^{/tau’}$, for a constant $c$ and a $/tau’$ that is either $/tau$ or $/tau+1$ ("more often" $/tau$ than $/tau+1$). He proves related theorems for other models of random graphs, including models with $d$ odd.

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Biçim PDF ● Sayfalar 100 ● ISBN 9781470405168 ● Yayımcı American Mathematical Society ● İndirilebilir 3 kez ● Döviz EUR ● Kimlik 6613096 ● Kopya koruma Adobe DRM
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