The Intersection Graph of a Dihedral Group

Nurhabibah Nurhabibah (Universitas Mataram)
Abdul Gazir Syarifudin (Universitas Mataram)
I Gede Adhitya Wisnu Wardhana
Qurratul Aini (Universitas Mataram)

EIGEN MATHEMATICS JOURNAL
Vol. 4 No. 2 Desember 2021

The intersection graph of a finite group G is a graph (V,E) where V is a set of all non-trivial subgroups of G and E is a set of edges where two distinct subgroups H_i , H_j  are said to be adjacent if and only if H_i \cap H_j \neq {e} . This study discusses the intersection graph of a dihedral group D_{2n} specifically the subgraph, degree of vertices, radius, diameter, girth, and domination number. From this study, we obtained that if n=p^2 then the intersection graph of D_{2n} is containing complete subgraph K_{p+2} and \gamma(\Gamma_{D_{2n}})=p.