On the Spectral Analysis of the Superpower Graph of the Direct Product of Dihedral Groups

TL;DR

This paper studies the spectral properties of the superpower graph of the direct product of dihedral groups, providing explicit spectra for various cases and parameters.

Contribution

It determines the $A_eta$-adjacency, Laplacian, and signless Laplacian spectra of superpower graphs of dihedral group products, extending spectral analysis to these structures.

Findings

Spectra of the superpower graph of $D_p imes D_p$ are explicitly computed.

Spectral properties vary with different $eta$ values and group parameters.

Results include spectra for $D_{p^m}$ with odd prime $p$.

Abstract

The superpower graph of a finite group $G$, or $\mathcal{S}_G$, is an undirected simple graph whose vertices are the elements of the group $G$, and two distinct vertices $a,b\in G$ are adjacent if and only if the order of one vertex divides the order of the other vertex, which means that either $o(a)|o(b)$ or $o(b)|o(a)$. In this paper, we have investigated the $A_\alpha$-adjacency spectral properties of the superpower graph of the direct product $D_p\times D_p$, where $D_p$ is a dihedral group for $p$ being prime. Also, we have determined its Laplacian and signless Laplacian spectrum by giving different values to $\alpha$; furthermore, we delved into its superpower graph and deduced the $A_\alpha$- adjacency spectrum of the superpower graph of $D_p\times D_p$ and $D_{p^m}$ for $p$ being an odd prime.