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Перегляд Algebra and Discrete Mathematics, 2006, Vol. 5 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2006, Vol. 5 за назвою

Сортувати за: Порядок: Результатів:

  • 5th International Algebraic Conference in Ukraine 
    Kirichenko, V.V.; Sushchansky, V.I.; Varbanets, P.D. (Algebra and Discrete Mathematics, 2006)
    This volume contains papers based on the talks presented at the 5t h In- ternational Algebraic Conference in Ukraine, which took place in Ode ssa on July 20–27, 2005. The conference was organized by Odessa I. I. ...
  • Absolutely ubiquitous groups 
    Ivanov, A.; Majcher, K. (Algebra and Discrete Mathematics, 2006)
    We characterise absolutely ubiquitous groups in the class of model complete ω-categorical groups.
  • A construction of dual box 
    Ovsienko, S. (Algebra and Discrete Mathematics, 2006)
    Let R be a quasi-hereditary algebra, F(∆) and F(∇) its categories of good and cogood modules correspondingly. In [6] these categories were characterized as the categories of representations of some boxes A = A∆ and A∇. ...
  • Arithmetic properties of exceptional lattice paths 
    Rump, W. (Algebra and Discrete Mathematics, 2006)
    For a fixed real number ρ > 0, let L be an affine line of slope ρ ⁻¹ in R ² . We show that the closest approximation of L by a path P in Z ² is unique, except in one case, up to integral translation. We study this ...
  • Bimodule problems and cell complexes 
    Babych, V.; Golovashchuk, N. (Algebra and Discrete Mathematics, 2006)
    We investigate the geometrical properties of the universal covering Ab of a bimodule problem A.
  • Classification of inverse semigroups generated by two-state partially defined invertible automata over the two-symbol alphabet 
    Slupik, J.K. (Algebra and Discrete Mathematics, 2006)
    The classification of inverse semigroups generated by two-state partially defined invertible automata over a twosymbol alphabet is investigated. Two presentations of such semigroups are given. The structures of these ...
  • Cohomology of the categorical at zero semigroups 
    Kostin, A. (Algebra and Discrete Mathematics, 2006)
    In this article we consider the relation between 0−cohomology and extended Eilenberg-MacLane cohomology of categorical at zero semigroups.
  • Dense ideal extensions of strict regular semigroups 
    Pastijn, F.J.; Oliveira, L. (Algebra and Discrete Mathematics, 2006)
    If V is an existence variety of strict regular semigroups, then every semigroup in V has, within V, a maximal dense ideal extension.
  • Fibrations and cofibrations in a stratified model category 
    Spalinski, J. (Algebra and Discrete Mathematics, 2006)
    We introduce n-acyclic cofibrations and n-acyclic fibrations in a stratified model category and show that they have the key properties of (acyclic) cofibrations and (acyclic) fibrations in a model category. We analyse ...
  • Geometry monoid of the left distributivity and the left idempotency 
    Jedlicka, P. (Algebra and Discrete Mathematics, 2006)
    We construct here the geometry monoids of LDI (left distributive idempotent) and of LDLI (left distributive left idempotent) identities. We study their properties and construct a monoid with solvable word problem based ...
  • Groups which are isomorphic to their subgroups with non-modular subgroup lattice 
    De Falco, M.; Musella, C. (Algebra and Discrete Mathematics, 2006)
    This paper describes the structure of groups G containing proper subgroups with non-modular subgroup lattice and such that all such subgroups are isomorphic to G.
  • Isolated and nilpotent subsemigroups in the variants of ISn 
    Tsyaputa, G. (Algebra and Discrete Mathematics, 2006)
    All isolated, completely isolated, and nilpotent subsemigroups in the semigroup ISn of all injective partial transformations of an n-element set, considered as a semigroup with a sandwich multiplication are described.
  • Isomorphisms of Cayley graphs of surface groups 
    Bozejko, M.; Dykema, K.; Lehner, F. (Algebra and Discrete Mathematics, 2006)
    A combinatorial proof is given for the fact that the Cayley graph of the fundamental group Γg of the closed, orientable surface of genus g ≥ 2 with respect to the usual generating set is isomorphic to the Cayley graph ...
  • Lattices of topologies of algebraic systems 
    Arnautov, V.I.; Filippov, K.M. (Algebra and Discrete Mathematics, 2006)
    The article is based on the report, which was delivered on a plenary sitting on the 5th International Algebraic Conference in the Ukraine (Odessa, July, 2005) and is a survey of the results on the lattices of topologies ...
  • Linear cellular automata: Garden of Eden Theorem, L-surjunctivity and group rings 
    Ceccherini-Silberstein, T.; Coornaert, M. (Algebra and Discrete Mathematics, 2006)
    This paper is a slightly extended version of the lecture given by the first author at the “5th International Algebraic Conference in Ukraine” held on July 20–27 2005 at the Odessa I.I. Mechnikov National University.
  • Modules over braces 
    Rump, W. (Algebra and Discrete Mathematics, 2006)
  • Nilpotent subsemigroups of a semigroup of order-decreasing transformations of a rooted tree 
    Автор відсутній (Algebra and Discrete Mathematics, 2006)
    This paper deals with a semigroup of orderdecreasing transformations of a rooted tree. Such are the transformations α of some rooted tree G satisfying following condition: for any x from G α(x) belongs to a simple path ...
  • On automorphism groups of some modules 
    Dashkova, O.Yu. (Algebra and Discrete Mathematics, 2006)
    In this paper we investigated ZG-module A, where G is either nilpotent or soluble group of infinite special rank. It is described the construction of these modules in the case, if for any proper subgroup H of infinite ...
  • On finite posets of injinj-finite type and their Tits forms 
    Bondarenko, V.M.; Styopochkina, M.V. (Algebra and Discrete Mathematics, 2006)
    We prove one theorem on connection between inj-finiteness of a finite poset and positive definiteness of its Tits form.
  • On fully wild categories of representations of posets 
    Kasjan, S. (Algebra and Discrete Mathematics, 2006)
    Assume that I is a finite partially ordered set and k is a field. We prove that if the category prin(kI) of prinjective modules over the incidence k-algebra kI of I is fully k-wild then the category fpr(I,k) of finite ...

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