Geodesic
The (signless) Laplacian spectral radius of unicyclic and bicyclic graphs with $n$ vertices and $k$ pendant vertices
Czechoslovak Mathematical Journal, Tome 60 (2010) no. 3, pp. 849-867.

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In this paper, the effects on the signless Laplacian spectral radius of a graph are studied when some operations, such as edge moving, edge subdividing, are applied to the graph. Moreover, the largest signless Laplacian spectral radius among the all unicyclic graphs with $n$ vertices and $k$ pendant vertices is identified. Furthermore, we determine the graphs with the largest Laplacian spectral radii among the all unicyclic graphs and bicyclic graphs with $n$ vertices and $k$ pendant vertices, respectively.
Classification : 05C50, 05C75
Keywords: Laplacian matrix; signless Laplacian matrix; spectral radius 
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     author = {Liu, Muhuo and Tan, Xuezhong and Liu, BoLian},
     title = {The (signless) {Laplacian} spectral radius of unicyclic and bicyclic graphs with $n$  vertices and $k$  pendant vertices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {849--867},
     publisher = {mathdoc},
     volume = {60},
     number = {3},
     year = {2010},
     mrnumber = {2672419},
     zbl = {1224.05311},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2010__60_3_a16/}
}
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Liu, Muhuo; Tan, Xuezhong; Liu, BoLian. The (signless) Laplacian spectral radius of unicyclic and bicyclic graphs with $n$  vertices and $k$  pendant vertices. Czechoslovak Mathematical Journal, Tome 60 (2010) no. 3, pp. 849-867. http://geodesic.mathdoc.fr/item/CMJ_2010__60_3_a16/