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Перегляд Algebra and Discrete Mathematics, 2012, Vol. 13, Vol. 14 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2012, Vol. 13, Vol. 14 за назвою

Сортувати за: Порядок: Результатів:

  • Algebra in superextensions of inverse semigroups 
    Banakh, T.; Gavrylkiv, V. (Algebra and Discrete Mathematics, 2012)
    We find necessary and sufficient conditions on an (inverse) semigroup X under which its semigroups of maximal linked systems λ(X), filters φ(X), linked upfamilies N₂(X), and upfamilies υ(X) are inverse.
  • Algebra in superextensions of semilattices 
    Banakh, T.; Gavrylkiv, V. (Algebra and Discrete Mathematics, 2012)
    Given a semilattice X we study the algebraic properties of the semigroup υ(X) of upfamilies on X. The semigroup υ(X) contains the Stone-ˇCech extension β(X), the superextension λ(X), and the space of filters φ(X) on X as ...
  • A linear algorithm of checking of the graph connectness 
    Dudchenko, I.; Plakhotnyk, M. (Algebra and Discrete Mathematics, 2012)
    An algorithm of sorting of all simply laced graph such that subalgorithm of checking of that the graph is connected is of linear dependence on the number of vertices of the graph.
  • Andrei Vladimirovich Roiter. To the 75th anniversary 
    Drozd, Yu.; Kirichenko, V.; Krugliak, S.; Kleiner, M.; Bondarenko, V.; Ovsienko, S. (Algebra and Discrete Mathematics, 2012)
  • Automorphism groups of tetravalent Cayley graphs on minimal non-abelian groups 
    Ghasemi, M. (Algebra and Discrete Mathematics, 2012)
    A Cayley graph X = Cay(G, S) is called normal for G if the right regular representation R(G) of G is normal in the full automorphism group Aut(X) of X. In the present paper it is proved that all connected tetravalent Cayley ...
  • Characterization of finite groups with some S-quasinormal subgroups of fixed order 
    Asaad, M. (Algebra and Discrete Mathematics, 2012)
    Let G be a finite group. A subgroup of G is said to be S-quasinormal in G if it permutes with every Sylow subgroup of G. We fix in every non-cyclic Sylow subgroup P of the generalized Fitting subgroup a subgroup D such ...
  • Combinatorics of irreducible Gelfand-Tsetlin sl(3)-modules 
    Ramirez, L.E. (Algebra and Discrete Mathematics, 2012)
    In this paper we present an explicit description of all irreducible sl(3)-modules which admit a Gelfand-Tsetlin tableaux realization with respect to the standard Gelfand-Tsetlin subalgebra.
  • D. I . Zaitsev 
    Автор відсутній (Algebra and Discrete Mathematics, 2012)
    In the spring of 2012, the 70th birthday of Dmitriy I. Zaitsev (1942-1990) will come. D.I Zaitsev did not live two years to his 50th birthday, but his life in mathematics will be long. His main interests were very wide; ...
  • Domination on the vertices of labeled graphs 
    Grunsky, I.; Mikhaylova, I.; Sapunov, S. (Algebra and Discrete Mathematics, 2012)
    In this paper we introduce and study a domination relation on vertices of vertex-labeled graphs induced by vertex languages comparison. An effective method of checking this relation is developed. Properties of vertices ...
  • Expansions of numbers in positive Lüroth series and their applications to metric, probabilistic and fractal theories of numbers 
    Zhykharyeva, Yu.; Pratsiovytyi, M. (Algebra and Discrete Mathematics, 2012)
    We describe the geometry of representation of numbers belonging to (0, 1] by the positive Lüroth series, i.e., special series whose terms are reciprocal of positive integers. We establish the geometrical meaning of digits, ...
  • Finite local nearrings on metacyclic Miller-Moreno p-groups 
    Raievska, I.Yu.; Sysak, Ya.P. (Algebra and Discrete Mathematics, 2012)
    In this paper the metacyclic Miller-Moreno p-groups which appear as the additive groups of finite local nearrings are classified.
  • Groups with many pronormal and transitively normal subgroups 
    Kurdachenko, L.A.; Semko (Jr.), N.N.; Subbotin, I.Ya. (Algebra and Discrete Mathematics, 2012)
    A subgroup H of a group G is said to be transitively normal in G, if H is normal in every subgroup K ≥ H such that H is subnormal in K. We described some infinite groups, whose non–finitely generated subgroups are transitively ...
  • Inner automorphisms of Lie algebras related with generic 2 × 2 matrices 
    Drensky, V.; Fındık, S. (Algebra and Discrete Mathematics, 2012)
    Let Fm = Fm(var(sl₂(K))) be the relatively free algebra of rank m in the variety of Lie algebras generated by the algebra sl₂(K) over a field K of characteristic 0. Translating an old result of Baker from 1901 we present ...
  • Invariants of finite solvable groups 
    Monakhov, V.; Trofimuk, A. (Algebra and Discrete Mathematics, 2012)
    The article contains the results about invariants of solvable groups with given structure of Sylow subgroups and information about the nilpotent π-length of π-solvable groups. Open questions are formulated.
  • Local embeddability 
    Belegradek, O. (Algebra and Discrete Mathematics, 2012)
    For an arbitrary class of algebraic structures we consider a notion of a structure locally embeddable to structures of the class. This generalizes the notion of a group locally embeddable to finite groups studied by Vershik ...
  • Matrix characterization of symmetry groups of boolean functions 
    Jasionowski, P. (Algebra and Discrete Mathematics, 2012)
    We studies symmetry groups of boolean functions and construct new way of description of this problem in matrices language. Some theorems about constructions of symmetry groups with using matrices are presented. Some ...
  • On 0-semisimplicity of linear hulls of generators for semigroups generated by idempotents 
    Bondarenko, V.; Tertychna, O. (Algebra and Discrete Mathematics, 2012)
    Let I be a finite set (without 0) and J a subset of I × I without diagonal elements. Let S(I, J) denotes the semigroup generated by e₀ = 0 and ei, i ∈ I, with the following relations: e²i = ei for any i ∈ I, eiej = 0 for ...
  • One branch curve singularities with at most 2-parameter families of ideals 
    Drozd, Yu.A.; Skuratovskii, R.V. (Algebra and Discrete Mathematics, 2012)
    A criterion is given in order that the ideals of a one branch curve singularity form at most 2-parameter families. Namely, we present a list of plane curve singularities from the Arnold's classification which are the ...
  • On factorizations of limited solubly ω-saturated formations 
    Selkin, V. (Algebra and Discrete Mathematics, 2012)
    If F = F₁…Ft is the product of the formations F₁,…,Ft and F ≠ F₁…Fi−₁Fi+₁…Ft for all i = 1,…,t, then we call this product a non-cancellative factorization of the formation F. In this paper we gives a description of ...
  • On hypercentral fyzzy groups 
    Kurdachenko, L.A.; Grin, K.O.; Turbay, N.A. (Algebra and Discrete Mathematics, 2012)
    In an arbitrary fuzzy group we construct the upper central series and consider some its properties. In particular, the characterization of nilpotent fuzzy group has been obtained.

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