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Перегляд Algebra and Discrete Mathematics, 2019, Vol. 28, № 2 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2019, Vol. 28, № 2 за датою випуску

Сортувати за: Порядок: Результатів:

  • Free ultra-groups, generators and relations 
    Tolue, B.; Zolfaghari, P.; Moghaddasi, Gh. (Algebra and Discrete Mathematics, 2019)
    In this paper, we intend to define an ultra-group by its presentation. The attitude of the presentation for a group was the key for us to investigate in this area. Instead of writing whole elements of an ultra-group, we ...
  • The sparing number of the powers of certain Mycielski graphs 
    Sudev, N.K.; Chithra, K.P.; Germina, K.A. (Algebra and Discrete Mathematics, 2019)
    In this paper, we discuss the sparing number of the power graphs of the Mycielski graphs of certain graph classes.
  • On NSP constants of a matrix and their linear preservers 
    Skrzyński, M. (Algebra and Discrete Mathematics, 2019)
    We collect some basic properties of NSP constants of a matrix, discuss an additive behavior of the spark, and prove two theorems characterizing linear endomorphisms which preserve the NSP constants.
  • 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 ...
  • Domination polynomial of clique cover product of graphs 
    Jahari, S.; Alikhani, S. (Algebra and Discrete Mathematics, 2019)
    We study the D-equivalence classes of some families of graphs and, in particular, describe completely the D-equivalence classes of friendship graphs constructed by coalescing n copies of a cycle graph of length 3 with a ...
  • Interassociativity and three-element doppelsemigroups 
    Gavrylkiv, V.; Rendziak, D. (Algebra and Discrete Mathematics, 2019)
    In the paper we characterize all interassociates of some non-inverse semigroups and describe up to isomorphism all three-element (strong) doppelsemigroups and their automorphism groups. We prove that there exist 75 pairwise ...
  • Cohen-Macaulay modules over the plane curve singularity of type T₃₆ 
    Drozd, Y.A.; Tovpyha, O. (Algebra and Discrete Mathematics, 2019)
    For a wide class of Cohen–Macaulay modules over the local ring of the plane curve singularity of type T₃₆ we describe explicitly the corresponding matrix factorizations. The calculations are based on the technique of matrix ...
  • On dimension of product of groups 
    Dranishnikov, A. (Algebra and Discrete Mathematics, 2019)
    We prove the product formula cd(Г×Г) = 2 cd Г for cohomological dimension of geometrically finite groups.
  • A simplified proof of the reduction point crossing sign formula for Verma modules 
    Denis, M.St.; Yee, W.L. (Algebra and Discrete Mathematics, 2019)
    The Unitary Dual Problem is one of the most important open problems in mathematics: classify the irreducible unitary representations of a group. That is, classify all irreducible representations admitting a definite invariant ...
  • Continuous limits of tilting modules 
    Braga, C.A. (Algebra and Discrete Mathematics, 2019)
    We provided a constructive argument to obtain an infinite generated tilting module from a family of tilting modules satisfying some hypotheses. We also applied the result over a hereditary algebra to get the Lukas tilting module.
  • Strongly prime submodules and strongly 0-dimensional modules 
    Bilgin, Z.; Koç, S.; Özkirişci, N.A. (Algebra and Discrete Mathematics, 2019)
    In this work, we study strongly prime submodules and strongly 0-dimensional modules. We give some equivalent conditions for being a strongly 0-dimensional module. Besides we show that the quasi-Zariski topology on the ...
  • On schurity of one-sided bimodule problems 
    Babych, V.; Golovashchuk, N. (Algebra and Discrete Mathematics, 2019)
    We consider a class of normal bimodule problems satisfying some structure, triangularity and finiteness conditions (one-sided bimodule problems). We study the structure of non-schurian bimodule problems from our class and ...
  • Yuriy Drozd (dedicated to 75th Birthday) 
    Автор відсутній (Algebra and Discrete Mathematics, 2019)
    On October 15, 2019 an outstanding Ukrainian mathematician, one of the founders of Kyiv algebraic school Yuriy Drozd celebrated his 75th birthday.

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