<i>k</i>-Zero-Divisor and Ideal-Based <i>k</i>-Zero-Divisor Hypergraphs of Some Commutative Rings

Abstract

Let R be a commutative ring with nonzero identity and k≥2 be a fixed integer. The k-zero-divisor hypergraph Hk(R) of R consists of the vertex set Z(R,k), the set of all k-zero-divisors of R, and the hyperedges of the form {a1,a2,a3,…,ak}, where a1,a2,a3,…,ak are k distinct elements in Z(R,k), which means (i) a1a2a3⋯ak=0 and (ii) the products of all elements of any (k−1) subsets of {a1,a2,a3,…,ak} are nonzero. This paper provides two commutative rings so that one of them induces a family of complete k-zero-divisor hypergraphs, while another induces a family of k-partite σ-zero-divisor hypergraphs, which illustrates unbalanced or asymmetric structure. Moreover, the diameter and the minimum length of all cycles or girth of the family of k-partite σ-zero-divisor hypergraphs are determined. In addition to a k-zero-divisor hypergraph, we provide the definition of an ideal-based k-zero-divisor hypergraph and some basic results on these hypergraphs concerning a complete k-partite k-uniform hypergraph, a complete k-uniform hypergraph, and a clique.

Keywords

• <i>k</i>-zero-divisor
• <i>k</i>-zero-divisor hypergraph
• ideal-based <i>k</i>-zero-divisor
• ideal-based <i>k</i>-zero-divisor hypergraph
• complete <i>k</i>-uniform hypergraph
• <i>k</i>-partite <i>k</i>-uniform hypergraph