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Перегляд Algebra and Discrete Mathematics за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics за назвою

Сортувати за: Порядок: Результатів:

  • A 2-generated 2-related group with no non-trivial finite quotients 
    Ol’shanskii, A.Yu.; Sapir, M.V. (Algebra and Discrete Mathematics, 2007)
    We construct a 2-generated 2-related group without non-trivial finite factors-groups. This answers a question of J. Button.
  • Abelian doppelsemigroups 
    Zhuchok, A.V.; Knauer, K. (Algebra and Discrete Mathematics, 2018)
    A doppelsemigroup is an algebraic system consisting of a set with two binary associative operations satisfying certain identities. Doppelsemigroups are a generalization of semigroups and they have relationships with such ...
  • Abnormal subgroups and Carter subgroups in some infinite groups 
    Kurdachenko, L.A.; Subbotin, I.Ya. (Algebra and Discrete Mathematics, 2005)
    t. Some properties of abnormal subgroups in generalized soluble groups are considered. In particular, the transitivity of abnormality in metahypercentral groups is proven. Also it is proven that a subgroup H of a radical ...
  • About the spectra of a real nonnegative matrix and its signings 
    Attas, K.; Boussaïri, A.; Zaidi, M. (Algebra and Discrete Mathematics, 2021)
    For a complex matrix M, we denote by Sp(M) the spectrum of M and by |M| its absolute value, that is the matrix obtained from M by replacing each entry of M by its absolute value. Let A be a nonnegative real matrix, we call ...
  • 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 characterization via graphs of the soluble groups in which permutability is transitive 
    Ballester-Bolinches, A.; Cossey, J.; Esteban-Romero, R. (Algebra and Discrete Mathematics, 2009)
    There are different ways to associate to a group a certain graph. In this context, it is interesting to ask for the relations between the structure of the group, given in group-theoretical terms, and the structure of the ...
  • A commutative Bezout PM* domain is an elementary divisor ring 
    Zabavsky, B.; Gatalevych, A. (Algebra and Discrete Mathematics, 2015)
    We prove that any commutative Bezout PM∗ domain is an elementary divisor ring.
  • 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∇. ...
  • A criterion of elementary divisor domain for distributive domains 
    Bokhonko, V.; Zabavsky, B.V. (Algebra and Discrete Mathematics, 2017)
    In this paper we introduce the notion of the neat range one for Bezout duo-domains. We show that a distributive Bezout domain is an elementary divisor domain if and only if it is a duo-domain of neat range one.
  • Action type geometrical equivalence of representations of groups 
    Plotkin, B.; Tsurkov, A. (Algebra and Discrete Mathematics, 2005)
    In the paper we prove (Theorem 8.1) that there exists a continuum of non isomorphic simple modules over KF₂, where F₂ is a free group with 2 generators (compare with [Ca] where a continuum of non isomorphic simple ...
  • Additivity of elementary maps on alternative rings 
    Ferreira, B.L.M. (Algebra and Discrete Mathematics, 2019)
    Let ℜ and ℜ′ be alternative rings. In this article we investigate the additivity of surjective elementary maps of ℜ × ℜ′. As a main theorem, we prove that if ℜ idempotent satisfying some conditions, these maps are additive.
  • 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 decomposition theorem for semiprime rings 
    Khibina, M. (Algebra and Discrete Mathematics, 2005)
    A ring A is called an F DI-ring if there exists a decomposition of the identity of A in a sum of finite number of pairwise orthogonal primitive idempotents. We call a primitive idempotent e artinian if the ring eAe is ...
  • Adjoint functors, preradicals and closure operators in module categories 
    Kashu, A.I. (Algebra and Discrete Mathematics, 2019)
    In this article preradicals and closure operators are studied in an adjoint situation, defined by two covariant functors between the module categories R-Mod and S-Mod. The mappings which determine the relationship between ...
  • A family of doubly stochastic matrices involving Chebyshev polynomials 
    Ahmed, T.; Caballero, J.M.R. (Algebra and Discrete Mathematics, 2019)
    A doubly stochastic matrix is a square matrix A = (aij) of non-negative real numbers such that ∑i aij =∑j aij =1. The Chebyshev polynomial of the first kind is defined by the recurrence relation T₀ (x) = 1, T₁ (x) = x, and ...
  • A filtration on the ring of Laurent polynomials and representations of the general linear Lie algebra 
    Choi, C.; Kim, S.; Seo, H. (Algebra and Discrete Mathematics, 2021)
    We first present a filtration on the ring Ln of Laurent polynomials such that the direct sum decomposition of its associated graded ring grLn agrees with the direct sum decomposition of grLn, as a module over the complex ...
  • A formula for the number of weak endomorphisms on paths 
    Knauer, U.; Pipattanajinda, N. (Algebra and Discrete Mathematics, 2018)
    A weak endomorphisms of a graph is a mapping on the vertex set of the graph which preserves or contracts edges. In this paper we provide a formula to determine the cardinalities of weak endomorphism monoids of finite ...
  • 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 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 generalization of supplemented modules 
    Inankil, H.; Halıcıoglu, S.; Harmanci, A. (Algebra and Discrete Mathematics, 2011)
    Let R be an arbitrary ring with identity and M a right R-module. In this paper, we introduce a class of modules which is an analogous of δ-supplemented modules defined by Kosan. The module M is called principally ...

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