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Перегляд Algebra and Discrete Mathematics, 2010, Vol. 9, Vol. 10 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2010, Vol. 9, Vol. 10 за назвою

Сортувати за: Порядок: Результатів:

  • 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 ...
  • A generalization of groups with many almost normal subgroups 
    Russo, F.G. (Algebra and Discrete Mathematics, 2010)
    A subgroup H of a group G is called almost normal in G if it has finitely many conjugates in G. A classic result of B. H. Neumann informs us that |G:Z(G)| is finite if and only if each H is almost normal in G. Starting ...
  • A note about splittings of groups and commensurability under a cohomological point of view 
    Maria Gorete Carreira Andrade; Ermınia de Lourdes Campelloi Fanti (Algebra and Discrete Mathematics, 2010)
    Let G be a group, let S be a subgroup with infinite index in G and let FSG be a certain Z2G-module. In this paper, using the cohomological invariant E(G,S,FSG) or simply E~(G,S) (defined in [2]), we analyze some results ...
  • 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.
  • Associated prime ideals of weak σ-rigid rings and their extensions 
    Bhat, V.K. (Algebra and Discrete Mathematics, 2010)
    Let R be a right Noetherian ring which is also an algebra over Q (Q the field of rational numbers). Let σ be an automorphism of R and δ a σ-derivation of R. Let further σ be such that aσ(a)∈N(R) implies that ...
  • Automorphisms of finitary incidence rings 
    Khripchenko, N. (Algebra and Discrete Mathematics, 2010)
  • Biserial minor degenerations of matrix algebras over a field 
    Wlodarska, A. (Algebra and Discrete Mathematics, 2010)
    Let n≥2 be a positive integer, K an arbitrary field, and q=[q⁽¹⁾|…|q⁽ⁿ⁾] an n-block matrix of n×n square matrices q⁽¹⁾,…,q⁽ⁿ⁾ with coefficients in K satisfying the conditions (C1) and (C2) listed in the introduction. We ...
  • Camina groups with few conjugacy classes 
    Cangelmi, L.; Muktibodh, A.S. (Algebra and Discrete Mathematics, 2010)
    Let G be a finite group having a proper normal subgroup K such that the conjugacy classes outside K coincide with the cosets of K. The subgroup K turns out to be the derived subgroup of G, so the group G is either abelian ...
  • Diagonal direct limits of finite symmetric and alternating groups 
    Lavrenyuk, Y.V.; Nekrashevych, V.V.; Sushchansky, V.I. (Algebra and Discrete Mathematics, 2010)
    Diagonal direct limits of permutation groups are studied using their representations by homeomorphisms of the boundary of rooted trees. We describe a new method of classification of such permutation groups, and use this ...
  • Finite groups as groups of automata with no cycles with exit 
    Russyev, A. (Algebra and Discrete Mathematics, 2010)
    Representations of finite groups as automata groups over a binary alphabet are investigated. The subclass of groups of automata with no cycles with exit is studied.
  • Free commutative dimonoids 
    Zhuchok, A.V. (Algebra and Discrete Mathematics, 2010)
    We construct a free commutative dimonoid and characterize the least idempotent congruence on this dimonoid.
  • 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 ...
  • 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. ...
  • Groups of linear automata 
    Oliynyk, A. (Algebra and Discrete Mathematics, 2010)
    The scalar automata as a special class of groups of linear automata over modules are introduced. The groups of scalar automata are classified.
  • Hall operators on the set of formations of finite groups 
    Mekhovich, A.P.; Vorob’ev, N.N.; Vorob’ev, N.T. (Algebra and Discrete Mathematics, 2010)
    Let π be a nonempty set of primes and let F be a saturated formation of all finite soluble π-groups. It is constructed the saturated formation consisting of all finite π-soluble groups whose F-projectors contain a Hall ...
  • Lattices of classes of groupoids with one-sided quasigroup conditions 
    Galuszka, J. (Algebra and Discrete Mathematics, 2010)
    It is shown that two classes of groupoids satisfying certain one-sided quasigroup conditions, namely the classes of one-sided torsion groupoids and of one-sided finite exponent groupoids, are complete lattices, both ...
  • Length functions for semigroup embeddings 
    Davis, T.C. (Algebra and Discrete Mathematics, 2010)
    Following the work done in [O] for groups, we describe, for a given semigroup S, which functions l:S→N can be realized up to equivalence as length functions g↦|g|H by embedding S into a finitely generated semigroup H. We ...
  • 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 ...
  • Odd-quadratic Malcev superalgebras 
    Barreiro, E. (Algebra and Discrete Mathematics, 2010)
    We present some properties of odd-quadratic Malcev superalgebras. The aim of this paper is to present the notions of double extension and generalized double extension of odd-quadratic Malcev superalgebras, culminating in ...
  • On commutative nilalgebras of low dimension 
    Gutierrez Fernandez, J.C. (Algebra and Discrete Mathematics, 2010)
    We prove that every commutative non-associative nilalgebra of dimension ≤7, over a field of characteristic zero or sufficiently large is solvable.

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