Some relations between power graphs and Cayley graphs

Document Type : Original Article

Authors

Department of Mathematics, Indian Institute of Technology Kharagpur, India

Abstract

Motivated by an open problem of Abawajy et al. [1] we find some relations between
power graphs and Cayley graphs of finite cyclic groups. We show that the vertex deleted subgraphs
of some power graphs are spanning subgraphs or equal to the complement of vertex deleted
subgraphs of some unitary Cayley graphs. Also we prove that some Cayley graphs can be expressed
as direct product of power graphs. Applying these relations we study the eigenvalues and energy of
power graphs and the related Cayley graphs.

Keywords