Interplay between various graphs on C(X)ρ

Handle

https://riunet.upv.es/handle/10251/236711

Cita bibliográfica

Dey, A.; Bag, S.; Mandal, DD. (2026). Interplay between various graphs on C(X)ρ. Applied General Topology. 27(2). https://doi.org/10.4995/agt.24688

Titulación

Resumen

[EN] This article focuses on the study of zero-divisor graph ?(C(X)P), annihilator graph AG(C(X)P) and weakly zero-divisor graph W?(C(X)P) on the ring C(X)P of all real-valued functions on a topological space X that are continuous outside a member of an ideal P of closed subsets of X. We establish that if C(X)P properly contains the ring C(X) of real-valued continuous functions on X, then the radius of ?(C(X)P) is 2 and it is not triangulated. Moreover, in this situation, both ?(C(X)P) and AG(C(X)P) are not hypertriangulated and the dominating number of AG(C(X)P) is 2. Furthermore, W?(C(X)P) fails to be a complete graph under the hypothesis C(X)P?C(X). We establish a connection between the complemented-ness of ?(C(X)P) and the Von-Neumann regularity of C(X)P under the assumption that C(X)P?{?{p}:p?X}. We realise that any two of these three graphs coincide if and only if |X|=2 and in this case, the graphs are complete bipartite. We also note that the phenomena of W?(C(X)P) being triangulated, hypertriangulated and complemented depend solely on the cardinality of X.

Fuente

Applied General Topology issn: 1576-9402

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