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Перегляд Algebra and Discrete Mathematics, 2014, Vol. 17, Vol. 18 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2014, Vol. 17, Vol. 18 за назвою

Сортувати за: Порядок: Результатів:

  • Additivity of Jordan elementary maps on standard rings 
    Ferreira, B.L.M.; Guzzo Jr., H.; Ferreira, J.C.M. (Algebra and Discrete Mathematics, 2014)
    We prove that Jordan elementary surjective maps on standard rings are additive.
  • A Galois-Grothendieck-type correspondence for groupoid actions 
    Paques, A.; Tamusiunas, T. (Algebra and Discrete Mathematics, 2014)
    In this paper we present a Galois-Grothendiecktype correspondence for groupoid actions. As an application a Galois-type correspondence is also given.
  • A geometrical interpretation of infinite wreath powers 
    Mikaelian, V.H. (Algebra and Discrete Mathematics, 2014)
    A geometrical construction based on an infinite tree graph is suggested to illustrate the concept of infinite wreath powers of P.Hall. We use techniques based on infinite wreath powers and on this geometrical constriction ...
  • Algorithmic computation of principal posets using Maple and Python 
    Gasiorek, M.; Simson, D.; Zajac, K. (Algebra and Discrete Mathematics, 2014)
    We present symbolic and numerical algorithms for a computer search in the Coxeter spectral classification problems. One of the main aims of the paper is to study finite posets I that are principal, i.e., the rational ...
  • A new characterization of alternating groups 
    Asboei, A.K.; Amiri, S.S.; Iranmanesh, A. (Algebra and Discrete Mathematics, 2014)
    Let G be a finite group and let πe(G) be the set of element orders of G. Let k ∈ πe(G) and let mk be the number of elements of order k in G. Set nse(G):={mk|k ∈ πe(G)}. In this paper, we show that if n= r, r + 1, r + 2, r ...
  • A nilpotent non abelian group code 
    Nebe, G.; Schäfer, A. (Algebra and Discrete Mathematics, 2014)
    The paper reports an example for a nilpotent group code which is not monomially equivalent to some abelian group code.
  • Characterizing semigroups with commutative superextensions 
    Banakh, T.; Gavrylkiv, V. (Algebra and Discrete Mathematics, 2014)
    We characterize semigroups X whose semigroups of filters φ(X), maximal linked systems λ(X), linked upfamilies N₂(X), and upfamilies υ(X) are commutative.
  • Chromatic number of graphs with special distance sets, I 
    Yegnanarayanan, V. (Algebra and Discrete Mathematics, 2014)
    Given a subset D of positive integers, an integer distance graph is a graph G(Z, D) with the set Z of integers as vertex set and with an edge joining two vertices u and v if and only if |u−v| ∈ D. In this paper we consider ...
  • Colour class domination numbers of some classes of graphs 
    Venkatakrishnan, Y.; Swaminathan, V. (Algebra and Discrete Mathematics, 2014)
    We compute the colour class domination number of fan graphs, double fan graphs, Helm graphs, flower graphs and sun flower graphs.
  • Connectivity and planarity of power graphs of finite cyclic, dihedral and dicyclic groups 
    Chattopadhyay, S.; Panigrahi, P. (Algebra and Discrete Mathematics, 2014)
    The power graph of a finite group is the graph whose vertices are the elements of the group and two distinct vertices are adjacent if and only if one is an integral power of the other. In this paper we discuss the planarity ...
  • Construction of free g-dimonoids 
    Movsisyan, Yu.; Davidov, S.; Safaryan, M. (Algebra and Discrete Mathematics, 2014)
    In this paper, the concept of a g-dimonoid is introduced and the construction of a free g-dimonoid is described. (A g-dimonoid is a duplex satisfying two additional identities.)
  • Dense subgroups in the group of interval exchange transformations 
    Bier, A.; Sushchanskyy, V. (Algebra and Discrete Mathematics, 2014)
    The paper concerns the characterization of the group IET of interval exchange transformations (iet). We investigate a class of rational subgroups of IET. These are subgroups consisting of iet transformations defined by ...
  • Densities, submeasures and partitions of groups 
    Banakh, T.; Protasov, I.; Slobodianiuk, S. (Algebra and Discrete Mathematics, 2014)
    In 1995 in Kourovka notebook the second author asked the following problem: is it true that for each partition G=A₁ ∪ ⋯ ∪ An of a group G there is a cell Ai of the partition such that G = FAiA⁻¹i for some set F ⊂ G of ...
  • Effective ring 
    Zabavsky, B.V.; Kuznitska, B.M. (Algebra and Discrete Mathematics, 2014)
    In this paper we will investigate commutative Bezout domains whose finite homomorphic images are semipotent rings. Among such commutative Bezout rings we consider a new class of rings and call them an effective rings. ...
  • Exponent matrices and Frobenius rings 
    Dokuchaev, M.A.; Kasyanuk, M.V.; Khibina, M.A.; Kirichenko, V.V. (Algebra and Discrete Mathematics, 2014)
    We give a survey of results connecting the exponent matrices with Frobenius rings. In particular, we prove that for any parmutation σ ∈ Sn there exists a countable set of indecomposable Frobenius semidistributive rings Am ...
  • Igor Volodymyrovych Protasov (dedicated to 60-th Birthday) 
    Автор відсутній (Algebra and Discrete Mathematics, 2014)
  • Lattices of partial sums 
    Chiaselotti, G.; Gentile, T.; Oliverio, P.A. (Algebra and Discrete Mathematics, 2014)
    In this paper we introduce and study a class of partially ordered sets that can be interpreted as partial sums of indeterminate real numbers. An important example of these partially ordered sets, is the classical Young ...
  • L-cross-sections of the finite symmetric semigroup 
    Bondar, E. (Algebra and Discrete Mathematics, 2014)
    In the present paper we give the description of all L-cross-sections of the finite symmetric semigroup.
  • Matrix approach to noncommutative stably free modules and Hermite rings 
    Lezama, O.; Gallego, C. (Algebra and Discrete Mathematics, 2014)
    In this paper we present a matrix-constructive proof of an Stafford’s Theorem about stably free modules over noncommutative rings. Matrix characterizations of noncommutative Hermite and projective-free rings are exhibit. ...
  • Minimal non-PC-groups 
    Artemovych, O.D. (Algebra and Discrete Mathematics, 2014)
    The purpose of this paper is to prove that a non-perfect group G is a minimal non-PC-group if and only if it is a minimal non-FC-group. It is shown that a perfect locally graded minimal non-PC-group is an indecomposable ...

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