Unitary Cayley graphs whose Roman domination numbers are at most four

• Main Authors: Chin, Angelina Yan Mui, Maimani, H. R., Pournaki, M. R., Sivagami, M., Tamizh Chelvam, T.
• Format: Article
• Published: Taylor & Francis Ltd 2022
• Subjects: QA Mathematics
• Online Access: http://eprints.um.edu.my/42977/

Let R be a finite commutative ring with nonzero identity. The unitary Cayley graph of R is the graph obtained by letting all the elements of R to be the vertices and defining distinct vertices x and y to be adjacent if and only if x - y is a unit element of R. In this paper, we characterize all unit...