Перегляд Algebra and Discrete Mathematics, 2018, Vol. 26, № 2 за назвою

Результати 5-8 з 8

Modules in which every surjective endomorphism has a δ-small kernel

Ebrahimi Atani, S.; Khoramdel, M.; Dolati Pishhesari, S. (Algebra and Discrete Mathematics, 2018)

In this paper,we introduce the notion of δ-Hopfian modules. We give some properties of these modules and provide a characterization of semisimple rings in terms of δ-Hopfian modules by proving that a ring R is semisimple ...
On a graph isomorphic to its intersection graph: self-graphoidal graphs

Das, P.K.; Singh, K.R. (Algebra and Discrete Mathematics, 2018)

A graph G is called a graphoidal graph if there exists a graph H and a graphoidal cover ψ of H such that G ≅ Ω (H, ψ ). Then the graph G is said to be self-graphoidal if it is isomorphic to one of its graphoidal graphs. ...
On unicyclic graphs of metric dimension 2 with vertices of degree 4

Dudenko, M.; Oliynyk, B. (Algebra and Discrete Mathematics, 2018)

We show that if G is a unicyclic graph with metric dimension 2 and {a, b} is a metric basis of G then the degree of any vertex v of G is at most 4 and degrees of both a and b are at most 2. The constructions of unispider ...
Spectral properties of partial automorphisms of a binary rooted tree

Kochubinska, E. (Algebra and Discrete Mathematics, 2018)

We study asymptotics of the spectral measure of a randomly chosen partial automorphism of a rooted tree. To every partial automorphism x we assign its action matrix Ax. It is shown that the uniform distribution on eigenvalues ...

Результати 5-8 з 8

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