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Перегляд Algebra and Discrete Mathematics, 2021, Vol. 32, № 2 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2021, Vol. 32, № 2 за датою випуску

Сортувати за: Порядок: Результатів:

  • On certain semigroups of contraction mappings of a finite chain 
    Umar, A.; Zubairu, M.M. (Algebra and Discrete Mathematics, 2021)
    Let [n] = {1, 2, . . . , n} be a finite chain and let Pn (resp. , Tn) be the semigroup of partial transformations on [n] (resp. , full transformations on [n]). Let CPn = {α ∈ Pn : (for all x, y ∈ Dom α) |xα−yα| ≤ |x−y|} ...
  • Some commutativity criteria for 3-prime near-rings 
    Raji, A. (Algebra and Discrete Mathematics, 2021)
    In the present paper, we introduce the notion of *-generalized derivation in near-ring N and investigate some properties involving that of *-generalized derivation of a *-prime near-ring N which forces N to be a commutative ...
  • A study on dual square free modules 
    Medina-Bárcenas, M.; Keskin Tütüncü, D.; Kuratomi, Y. (Algebra and Discrete Mathematics, 2021)
    Let M be an H-supplemented coatomic module with FIEP. Then we prove that M is dual square free if and only if every maximal submodule ofM is fully invariant. Let M = ⊕ i∈I Mi be a direct sum, such that M is coatomic. Then ...
  • Homotopy equivalence of normalized and unnormalized complexes, revisited 
    Lyubashenko, V.; Matsui, A. (Algebra and Discrete Mathematics, 2021)
    We consider the unnormalized and normalized complexes of a simplicial or a cosimplicial object coming from the DoldśKan correspondence for an idempotent complete additive category (kernels and cokernels are not required). ...
  • On the structure of the algebra of derivations of cyclic Leibniz algebras 
    Kurdachenko, L.A.; Semko, M.M.; Yashchuk, V.S. (Algebra and Discrete Mathematics, 2021)
    We describe the algebra of derivation of finitedimensional cyclic Leibniz algebra.
  • On the kernels of higher R-derivations of R[x1, ... xn] 
    Kour, S. (Algebra and Discrete Mathematics, 2021)
    Let R be an integral domain and A = R[x1, . . . , xn] be the polynomial ring in n variables. In this article, we study the kernel of higher R-derivation D of A. It is shown that if R is a HCF ring and tr. degR(Aᴰ) ≤ 1 then ...
  • Maximal subgroup growth of a few polycyclic groups 
    Kelley, A.; Wolfe, E. (Algebra and Discrete Mathematics, 2021)
    We give here the exact maximal subgroup growth of two classes of polycyclic groups. Let Gk = ⟨x1, x2, . . . , xk | xixjxi⁻¹ for all i < j⟩, so Gk = ℤ⋊(ℤ⋊(ℤ⋊• • •⋊ℤ)). Then for all integers k ≥ 2, we calculate mn(Gk), the ...
  • On the character tables of symmetric groups 
    Kawsathon, K.; Rodtes, K. (Algebra and Discrete Mathematics, 2021)
    In this paper, some zeros and non-zeros in the character tables of symmetric groups are displayed in the partition forms. In particular, more zeros of self conjugate partitions beside odd permutations are heavily investigated.
  • S-second submodules of a module 
    Farshadifar, F. (Algebra and Discrete Mathematics, 2021)
    Let R be a commutative ring with identity and let M be an R-module. The main purpose of this paper is to introduce and study the notion of S-second submodules of an R-module M as a generalization of second submodules of M.
  • On classifying the non-Tits P-critical posets 
    Bondarenko, V.M.; Styopochkina, M.V. (Algebra and Discrete Mathematics, 2021)
    In 2005, the authors described all introduced by them P-critical posets (minimal finite posets with the quadratic Tits form not being positive); up to isomorphism, their number is 132 (75 if duality is considered). Later ...
  • On the nilpotence of the prime radical in module categories 
    Arellano, C.; Castro, J.; Ríos, J. (Algebra and Discrete Mathematics, 2021)
    For M ∈ R-Mod and τ a hereditary torsion theory on the category σ[M] we use the concept of prime and semiprime module defined by Raggi et al. to introduce the concept of τ-pure prime radical Nτ (M) = Nτ as the intersection ...

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