In this paper, we determine the full normalized Laplacian spectrum of the subdivision-vertex corona, subdivision-edge corona, subdivisionvertex neighbourhood corona and subdivision-edge neighbourhood corona of a connected regular graphwith an arbitrary regular graph in terms of their normalized Laplacian eigenvalues. Moreover, applying these results, we find some non-regular normalized Laplacian cospectral graphs.
机构:
Institute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou,730070, ChinaInstitute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou,730070, China
Wen, Fei
Zhang, You
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机构:
Institute of the Applied Mathematics, Lanzhou Jiaotong University, Lanzhou,730070, ChinaInstitute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou,730070, China
Zhang, You
Wang, Wei
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School of Mathematics and Statistics, Xi’an Jiaotong University, Xi’an,710049, ChinaInstitute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou,730070, China