ON THE NORMALIZED LAPLACIAN SPECTRUM OF A NEW JOIN OF TWO GRAPHS-中国期刊网

摘要 GivengraphsG1andG2,wedefineagraphoperationonG1andG2,namelytheSSG-vertexjoinofG1andG2,denotedbyG1★G2.LetS(G)bethesubdivisiongraphofG.TheSSG-vertexjoinG1★G2.isthegraphobtainedfromS(G1)andS(G2)byjoiningeachvertexofG1witheachvertexof62-Inthispaper,whenGi(i=1,2)isaregulargraph,wedeterminethenormalizedLaplacianspectrumofG1★G2.Asapplications,weconstructmanypairsofnormalizedLaplaciancospectralgraphs,thenormalizedLaplacianenergy,andthedegreeKirchhoffindexofG1★G2.

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ON THE NORMALIZED LAPLACIAN SPECTRUM OF A NEW JOIN OF TWO GRAPHS

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ON THE NORMALIZED LAPLACIAN SPECTRUM OF A NEW JOIN OF TWO GRAPHS

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