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Spectral radius of graphs with given matching number
Authors:Lihua Feng  Guihai Yu
Institution:a School of Mathematics, Shandong Institute of Business and Technology, 191 Binhaizhong Road, Yantai, Shandong 264005, PR China
b Department of Mathematics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China
Abstract:In this paper, we show that of all graphs of order n with matching number β, the graphs with maximal spectral radius are Kn if n = 2β or 2β + 1; View the MathML source if 2β + 2 ? n < 3β + 2; View the MathML source or View the MathML source if n = 3β + 2; View the MathML source if n > 3β + 2, where View the MathML source is the empty graph on t vertices.
Keywords:05C35  05C50
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