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Domination in generalized unit and unitary Cayley graphs of finite rings

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Abstract

Let R be a finite commutative ring with nonzero identity and U(R) be the set of all units of R. The graph Γ is the simple undirected graph with vertex set R in which two distinct vertices x and y are adjacent if and only if there exists a unit element u in U(R) such that x + uy is a unit in R. Also, \(\overline{\Gamma}\) denotes the complement of Γ. In this paper, we find the domination number γ of Γ as well as \(\overline{\Gamma}\) and characterize all γ-sets in Γ and \(\overline{\Gamma}\). Also, we obtain the bondage number of Γ. Further, we obtain the values of some domination parameters like independent, strong and weak domination numbers of \(\overline{\Gamma}\).

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Acknowledgement

This research work is supported by the SERB Project No. SR/S4/MS.806/13 of Science and Engineering Research Board, Government of India through the first author.

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Correspondence to T. Tamizh Chelvam, S. Anukumar Kathirvel or M. Balamurugan.

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Tamizh Chelvam, T., Anukumar Kathirvel, S. & Balamurugan, M. Domination in generalized unit and unitary Cayley graphs of finite rings. Indian J Pure Appl Math 51, 533–556 (2020). https://doi.org/10.1007/s13226-020-0415-7

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  • DOI: https://doi.org/10.1007/s13226-020-0415-7

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