On the Laplacian-energy-like invariant

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作者：
机构：
[1] Das, Kinkar Ch.
[2] 2,Gutman, Ivan
[3] Çevik, A. Sinan
来源：
Gutman, I. (gutman@kg.ac.rs) | 1600年 / Elsevier Inc.卷 / 442期
关键词：
Graph theory - Laplace transforms;
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摘要：
Let G be a connected graph of order n with Laplacian eigenvalues μ1≥μ2≥≥μn-1> μn=0. The Laplacian-energy-like invariant of the graph G is defined as LEL = LEL(G)= Σi=1n-1√μi. Lower and upper bounds for LEL are obtained, in terms of n, number of edges, maximum vertex degree, and number of spanning trees. © 2013 Elsevier Inc. All rights reserved.
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