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Перегляд Algebra and Discrete Mathematics, 2010, Vol. 10, № 2 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2010, Vol. 10, № 2 за датою випуску

Сортувати за: Порядок: Результатів:

  • Symbolic Rees algebras, vertex covers and irreducible representations of Rees cones 
    Dupont, L.D.; Villarreal, R.H. (Algebra and Discrete Mathematics, 2010)
    Let G be a simple graph and let Ic(G) be its ideal of vertex covers. We give a graph theoretical description of the irreducible b-vertex covers of G, i.e., we describe the minimal generators of the symbolic Rees algebra ...
  • On τ-closed n-multiply ω-composition formations with Boolean sublattices 
    Zhiznevsky, P. (Algebra and Discrete Mathematics, 2010)
    In the universe of finite groups the description of τ-closed n-multiply ω-composition formations with Boolean sublattices of τ-closed n-multiply ω-composition subformations is obtained.
  • Steadiness of polynomial rings 
    Zemlicka, J. (Algebra and Discrete Mathematics, 2010)
    A module M is said to be small if the functor Hom(M,−) commutes with direct sums and right steady rings are exactly those rings whose small modules are necessary finitely generated. We give several results on steadiness ...
  • On separable and H-separable polynomials in skew polynomial rings of several variables 
    Ikehata, S. (Algebra and Discrete Mathematics, 2010)
    Let B be a ring with 1, and {ρ1,⋯,ρe} a set of automorphisms of B. Let B[X1,⋯,Xe;ρ1,⋯,ρe;{uij}] be the skew polynomial ring of automorphism type. In this paper, we shall give equivalent conditions that the residue ring of ...
  • Free semigroups in wreath powers of transformation semigroups 
    Oliynyk, A. (Algebra and Discrete Mathematics, 2010)
    It is established a criterion when the infinite wreath power of a finite transformation semigroup contains a free subsemigroup. It is shown that the infinite wreath power of a transformation semigroup either contains no ...
  • A sequence of factorizable subgroups 
    Dabbaghian, V. (Algebra and Discrete Mathematics, 2010)
    Let G be a non-abelian non-simple group. In this article the group G such that G=MCG(M) will be studied, where M is a proper maximal subgroup of G and CG(M) is the centralizer of M in G.
  • Generalized ⊕-supplemented modules 
    Calısıcı, H.; Turkmen, E. (Algebra and Discrete Mathematics, 2010)
    Let R be a ring and M be a left R-module. M is called generalized ⊕- supplemented if every submodule of M has a generalized supplement that is a direct summand of M. In this paper we give various properties of such modules. ...
  • Modules whose maximal submodules have τ-supplements 
    Buyukasık, E. (Algebra and Discrete Mathematics, 2010)
    Let R be a ring and τ be a preradical for the category of left R-modules. In this paper, we study on modules whose maximal submodules have τ-supplements. We give some characterizations of these modules in terms their ...
  • 2-Galois groups and the Kaplansky radical 
    Dario, R.P.; Engler, A.J. (Algebra and Discrete Mathematics, 2010)
    An accurate description of the Galois group GF(2) of the maximal Galois 2-extension of a field F may be given for fields F admitting a 2-henselian valuation ring. In this note we generalize this result by characterizing ...
  • On modules over group rings of soluble groups with commutative ring of scalars 
    Dashkova, O.Yu. (Algebra and Discrete Mathematics, 2010)
    The author studies an RG-module A such that R is a commutative ring, A/CA(G) is not a Noetherian R-module, CG(A)=1, G is a soluble group. The system of all subgroups H≤G, for which the quotient modules A/CA(H) are not ...

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