Abstract
The power graph of a group G is the graph with group elements as vertex set and two elements are adjacent if one is a power of the other. The aim of this paper is to compute the spectrum of the power graph of cyclic groups, dihedral groups, elementary abelian groups of prime power order and the Mathieu group .
Acknowledgements
We are indebted to the referees for their corrections and helpful remarks leaded us to rearrange the paper.