Geodesic
Domination parameters of the unitary Cayley graph of $\mathbb{Z} // n\mathbb{Z}$
Discussiones Mathematicae. Graph Theory, Tome 43 (2023) no. 1, pp. 95-114

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The unitary Cayley graph of ℤ // nℤ, denoted X_n, is the graph with vertex set {0, . . . ,n-1} where vertices a and b are adjacent if and only if (a-b,n) = 1. We answer a question of Defant and Iyer by constructing a family of infinitely many integers n such that γ_t(X_n) ≤ g(n) - 2, where γ_t denotes the total domination number and g denotes the Jacobsthal function. We determine the irredundance number, domination number, and lower independence number of certain direct products of complete graphs and give bounds for these parameters for any direct product of complete graphs. We provide upper bounds on the size of irredundant sets in direct products of balanced, complete multipartite graphs which are asymptotically correct for the unitary Cayley graphs of integers with a bounded smallest prime factor.
Keywords: unitary Cayley graph, domination chain, direct product, complete balanced multipartite graph 
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Burcroff, Amanda. Domination parameters of the unitary Cayley graph of $\mathbb{Z} // n\mathbb{Z}$. Discussiones Mathematicae. Graph Theory, Tome 43 (2023) no. 1, pp. 95-114. http://geodesic.mathdoc.fr/item/DMGT_2023_43_1_a5/