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Перегляд Algebra and Discrete Mathematics, 2020, Vol. 30, № 2 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2020, Vol. 30, № 2 за датою випуску

Сортувати за: Порядок: Результатів:

  • Worawiset, S.; Koppitz, J. (Algebra and Discrete Mathematics, 2020)
    In the present paper, we study semigroups of endomorphisms on Clifford semigroups with injective structure homomorphisms, where the semilattice has a least element. We describe such Clifford semigroups having a regular ...
  • Trofimuk, A. (Algebra and Discrete Mathematics, 2020)
    A subgroup A of a group G is called tcc-subgroup in G, if there is a subgroup T of G such that G = AT and for any X ≤ A and Y ≤ T there exists an element u ∈ hX, Y i such that XYᵘ ≤ G. The notation H ≤ G means that H is ...
  • Simoes da Silva, J.; Tsurkov, A. (Algebra and Discrete Mathematics, 2020)
    In this paper we construct an example of two representations (V₁,G₁) and (V₂,G₂) which are action type geometrically equivalent and groups G₁ and G₂ are geometrically equivalent, but the representations (V₁,G₁) and (V₂,G₂) ...
  • Sharma, P.; Naresh, R.; Sharma, U. (Algebra and Discrete Mathematics, 2020)
    In this manuscript, we have evaluated the energies of Smith graphs. In the course of the investigation, we found that only one Smith graph is hypo-energetic. Moreover, we have also established the energy bounds for Smith graphs.
  • Rezaei Sh. (Algebra and Discrete Mathematics, 2020)
    Let (R,m) be a local ring, Ф a system of ideals of R and M a finitely generated R-module. In this paper, we define and study general formal local cohomology modules. We denote the i-th general formal local cohomology module ...
  • Rajhi, A. (Algebra and Discrete Mathematics, 2020)
    We prove that the groups G for which the lattice of normal subgroups N(G) is factorial are exactly the UND-groups, that is the groups for which every normal subgroup have a unique normal complement, with finite length.
  • Protasov, I. (Algebra and Discrete Mathematics, 2020)
  • Öğüşlü, N.Ş. (Algebra and Discrete Mathematics, 2020)
    Let M be the metabelian product of free abelian Lie algebras of finite rank. In this study we prove that every normal automorphism of M is an IA-automorphism and acts identically on M′.
  • Niño, A.; Reyes, A. (Algebra and Discrete Mathematics, 2020)
    In this paper, we characterize the minimal prime ideals of skew PBW extensions over several classes of rings. We unify different results established in the literature for Ore extensions, and extend all of them to a several ...
  • Ghorbani, M.; Songhori, M. (Algebra and Discrete Mathematics, 2020)
    The set of eigenvalues of the adjacency matrix of a graph is called the spectrum of it. In the present paper, we introduce the spectrum of Cayley graphs of order pqr in terms of character table, where p, q, r are prime ...
  • Fanti, E.L.C.; Silva, L.S. (Algebra and Discrete Mathematics, 2020)
    Let us consider W a G-set and M a Z₂G-module, where G is a group. In this paper we investigate some properties of the cohomological the theory of splittings of groups. Namely, we give a proof of the invariant E(G,W,M), ...
  • Asboei, A.K.; Salehi, S.S. (Algebra and Discrete Mathematics, 2020)
    Let G be a finite group. The main supergraph S(G) is a graph with vertex set G in which two vertices x and y are adjacent if and only if o(x) | o(y) or o(y) | o(x). In this paper, we will show that G ≅ PSL(2, p) or PGL(2, ...
  • Aragona, R.; D'Andrea, A. (Algebra and Discrete Mathematics, 2020)
    We generalize Kudryavtseva and Mazorchuk’s concept of a canonical form of elements [9] in Kiselman’s semigroups to the setting of a Hecke-Kiselman monoid HKГ associated with a simple oriented graph Г. We use confluence ...

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