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math.GR2021★ 13 cited
On finite groups whose power graph is a cograph
Peter J. Cameron, Pallabi Manna, Ranjit Mehatari
A -free graph is called a cograph. In this paper we partially characterize finite groups whose power graph is a cograph. As we will see, this problem is a generalization of th…
math.CO2021
On the Seidel spectrum of threshold graphs
Santanu Mandal, Ranjit Mehatari
In this paper, we analyse spectral properties of Seidel matrix (denoted by ) of connected threshold graphs. We compute the characteristic polynomial and determinant of Seidel ma…