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Перегляд Algebra and Discrete Mathematics, 2021, Vol. 32, № 1 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2021, Vol. 32, № 1 за назвою

Сортувати за: Порядок: Результатів:

  • 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 ...
  • 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 ...
  • Cancellation ideals of a ring extension 
    Tchamna, S. (Algebra and Discrete Mathematics, 2021)
    We study properties of cancellation ideals of ring extensions. Let R ⊆ S be a ring extension. A nonzero S-regular ideal I of R is called a (quasi)-cancellation ideal of the ring extension R ⊆ S if whenever IB = IC for two ...
  • Coarse structures on groups defined by conjugations 
    Protasov, I.; Protasova, K. (Algebra and Discrete Mathematics, 2021)
  • Common neighborhood spectrum of commuting graphs of finite groups 
    Fasfous, W.N.T.; Sharafdini, R.; Nath, R.K. (Algebra and Discrete Mathematics, 2021)
    The commuting graph of a finite non-abelian group G with center Z(G), denoted by Гc(G), is a simple undirected graph whose vertex set is G\ Z(G), and two distinct vertices x and y are adjacent if and only if xy = yx. In ...
  • Diagonal torsion matrices associated with modular data 
    Singh, G. (Algebra and Discrete Mathematics, 2021)
    Modular data are commonly studied in mathematics and physics. A modular datum defines a finite-dimensional representation of the modular group SL₂(Z). Cuntz (2007) defined isomorphic integral modular data. Here we discuss ...
  • Free abelian trioids 
    Zhuchok, Yu.V. (Algebra and Discrete Mathematics, 2021)
    We construct a free abelian trioid and describe the least abelian congruence on a free trioid.
  • Isodual and self-dual codes from graphs 
    Mallik, S.; Yildiz, B. (Algebra and Discrete Mathematics, 2021)
    Binary linear codes are constructed from graphs, in particular, by the generator matrix [In|A] where A is the adjacency matrix of a graph on n vertices. A combinatorial interpretation of the minimum distance of such codes ...
  • Skew PBW extensions over symmetric rings 
    Reyes, A.; Suárez, H. (Algebra and Discrete Mathematics, 2021)
    Our purpose in this paper is to characterize skew PBW extensions over several weak symmetric rings. As a consequence of our treatment, we extend results in the literature concerning the property of symmetry for commutative ...
  • The structure of g-digroup actions and representation theory 
    Rodríguez-Nieto, J.G.; Salazar-Díaz, O.P.; Velásquez, R. (Algebra and Discrete Mathematics, 2021)
    The aim of this paper is to propose two possible ways of defining a g-digroup action and a first approximation to representation theory of g-digroups.

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