Discussiones Mathematicae Graph Theory 30(1) (2010) 85-93
doi: 10.7151/dmgt.1478

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Lin Cui  and Yi-Zheng Fan

School of Mathematical Sciences
Anhui University
Hefei 230039, P.R. China
e-mail: cuilin06@sina.com, fanyz@ahu.edu.cn


In this paper, we determine the graph with maximal signless Laplacian spectral radius among all connected graphs with fixed order and given number of cut vertices.

Keywords: graph, cut vertex, signless Laplacian matrix, spectral radius.

2010 Mathematics Subject Classification: 05C50, 15A18.


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Received 25 April 2008
Revised 2 January 2009
Accepted 12 March 2009