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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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
Key words
- Commutative rings
- generalized unit and unitary graph
- Cayley graphs
- complement graph
- domination number
- independent number