Spectrum and L-spectrum of the power graph and its main supergraph for certain finite groups
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Let G be a finite group. The power graph P(G) and its main supergraph S(G) are two simple graphs with the same vertex set G. Two elements x,y ? G are adjacent in the power graph if and only if one is a power of the other. They are joined in S(G) if and only if o(x)|o(y) or o(y)|o(x). The aim of this paper is to compute the characteristic polynomial of these graph for certain finite groups. As a consequence, the spectrum and Laplacian spectrum of these graphs for dihedral, semi-dihedral, cyclic and dicyclic groups were computed.
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2018 ◽
Vol 17
(10)
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pp. 1850184
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2019 ◽
Vol 19
(04)
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pp. 2050062
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