Spectral Condition for a Graph to be Hamiltonian with respect to Normalized Laplacian

preprint2012arXivOpen access

Abstract

Let G be a graph and let Δ,δbe the maximum and minimum degrees of G respectively, where Δ/δ<c<\sqrt{2} and c is a constant. In this paper we establish a sufficient spectral condition for the graph G to be Hamiltonian, that is, the nontrivial eigenvalues of the normalized Laplacian of G are sufficiently close to 1.

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