A graph associated to proper non-small subsemimodules of a semimodule

	A graph associated to proper non-small subsemimodules of a semimodule
International Journal of Nonlinear Analysis and Applications
دوره 12، شماره 2، بهمن 2021، صفحه 499-509 اصل مقاله (381.78 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22075/ijnaa.2021.5091
نویسنده
Ahmed H. Alwan^*
Department of Mathematics, College of Education for Pure Sciences, University of Thi-Qar, Thi-Qar, Iraq
چکیده
Let M be a unitary left R-semimodule where R is a commutative semiring with identity. The small intersection graph G(M) of a semimodule M is an undirected simple graph with all non-small proper subsemimodules of M as vertices and two distinct vertices N and L are adjacent if and only if N ∩ L is not small in M. In this paper, we investigate the fundamental properties of these graphs to relate the combinatorial properties of G(M) to the algebraic properties of the R-semimodule M. Determine the diameter and the girth of G(M). Moreover, we study cut vertex, clique number, domination number and independence number of the graph G(M). It is shown that the independence number of small graph is equal to the number of its maximal subsemimodules.
کلیدواژه‌ها
subsemimodule؛ small intersection graph؛ clique number؛ domination number؛ independence number
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