On the intersection power graph of a finite group

Sudip Bera


Given a group G, the intersection power graph of G, denoted by GI(G), is the graph with vertex set G and two distinct vertices x and y are adjacent in GI(G) if there exists a non-identity element z ∈ G such that xm=z=yn, for some m, n ∈ N, i.e. x ∼ y in GI(G) if ⟨x⟩ ∩ ⟨y⟩ ≠ {e} and e is adjacent to all other vertices, where e is the identity element of the group G. Here we show that the graph GI(G) is complete if and only if either G is cyclic p-group or G is a generalized quaternion group. Furthermore, GI(G) is Eulerian if and only if ∣G∣ is odd. We characterize all abelian groups and also all non-abelian p-groups G, for which GI(G) is dominatable. Beside, we determine the automorphism group of the graph GI(Zn), when n ≠ pm.


automorphism group, intersection power graph, planar, p-groups

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DOI: http://dx.doi.org/10.5614/ejgta.2018.6.1.13


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