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Перегляд Algebra and Discrete Mathematics, 2005, № 3 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2005, № 3 за датою випуску

Сортувати за: Порядок: Результатів:

  • A note on c-normal subgroups of finite groups 
    Skiba, A.N. (Algebra and Discrete Mathematics, 2005)
    Let G be a finite group. We fix in every noncyclic Sylow subgroup P of G some its subgroup D satisfying 1 < |D| < |P| and study the structure of G under assumption that all subgroups H of P with |H| = |D| are c-normal in G.
  • Ternary Hopf algebras 
    Zekovic, B. (Algebra and Discrete Mathematics, 2005)
    In this paper we introduce the notion of a ternary Hopf algebra and prove that it can be embedded into a universal enveloping Hopf algebra.
  • Two-generated graded algebras 
    Shirikov, E.N. (Algebra and Discrete Mathematics, 2005)
    The paper is devoted to classification of twogenerated graded algebras. We show that under some general assumptions there exist two classes of these algebras, namely quantum polynomials and Jordanian plane. We study prime ...
  • On square-Hamiltonian graphs 
    Protasova, K.D. (Algebra and Discrete Mathematics, 2005)
    A finite connected graph G is called squareHamiltonian if G² is Hamiltonian. We prove that any join of the family of Hamiltonian graphs by tree is square-Hamiltonian. Applying this statement we show that the line graph ...
  • Criterions of supersolubility of some finite factorizable groups 
    Legchekova, H.V. (Algebra and Discrete Mathematics, 2005)
    Let A, B be subgroups of a group G and ∅ 6= X ⊆ G. A subgroup A is said to be X-permutable with B if for some x ∈ X we have ABx = BxA [1]. We obtain some new criterions for supersolubility of a finite group G = AB, where ...
  • A necessary condition to test the minimality of generalized linear sequential machines using the theory of near-semirings 
    Krishna, K.V.; Chatterjee, N. (Algebra and Discrete Mathematics, 2005)
    In this work first we study the properties of nearsemirings to introduce an α-radical. Then we observe the role of near-semirings in generalized linear sequential machines, and we test the minimality through the radical.
  • On mappings of terms determined by hypersubstitutions 
    Koppitz, J.; Shtrakov, S. (Algebra and Discrete Mathematics, 2005)
    The extensions of hypersubstitutions are mappings on the set of all terms. In the present paper we characterize all hypersubstitutions which provide bijections on the set of all terms. The set of all such hypersubstitutions ...
  • Topological semigroups of matrix units 
    Gutik, O.V.; Pavlyk, K.P. (Algebra and Discrete Mathematics, 2005)
    We prove that the semigroup of matrix units is stable. Compact, countably compact and pseudocompact topologies τ on the infinite semigroup of matrix units Bλ such that (Bλ,τ ) is a semitopological (inverse) semigroup are ...

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