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Перегляд Algebra and Discrete Mathematics, 2009, № 3 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2009, № 3 за назвою

Сортувати за: Порядок: Результатів:

  • A Morita context related to finite groups acting partially on a ring 
    Guzman, J.A.; Lazzarin, J. (Algebra and Discrete Mathematics, 2009)
    In this paper we consider partial actions of groups on rings, partial skew group rings and partial fixed rings. We study a Morita context associated to these rings, α-partial Galois extensions and related aspects. Finally, ...
  • A new characterization of groups with central chief factors 
    Juriaans, O.S.; Raphael, D.M. (Algebra and Discrete Mathematics, 2009)
    In [1] it is proved that a locally nilpotent group is an (X)-group arising the question whether the converse holds. In this paper we derive some interesting properties and give a complete characterization of (X)-groups. ...
  • A note on a problem due to Zelmanowitz 
    Rodrigues, V.S.; Sant’Ana, A.A. (Algebra and Discrete Mathematics, 2009)
    In this paper we consider a problem due to Zelmanowitz. Specifically, we study under what conditions a uniform compressible module whose nonzero endomorphisms are monomorphisms is critically compressible. We give a positive ...
  • A note on semidirect products and nonabelian tensor products of groups 
    Nakaoka, I.N.; Rocco, N.R. (Algebra and Discrete Mathematics, 2009)
    Let G and H be groups which act compatibly on one another. In [2] and [8] it is considered a group construction η(G,H) which is related to the nonabelian tensor product G⊗H. In this note we study embedding questions of ...
  • A variant of the primitive element theorem for separable extensions of a commutative ring 
    Bagio, D.; Paques, A. (Algebra and Discrete Mathematics, 2009)
    In this article we show that any strongly separable extension of a commutative ring R can be embedded into another one having primitive element whenever every boolean localization of R modulo its Jacobson radical is von ...
  • On speciality of Jordan brackets 
    Shestakov, I. (Algebra and Discrete Mathematics, 2009)
    We conjecture a criterium of speciality for Jordan superalgebras of brackets that generalizes the corresponding criterium for Jordan Poisson superalgebras from [8]. We prove the necessarity condition of the criterium. The ...
  • Partial Hopf actions, partial invariants and a Morita context 
    Marcelo Muniz S. Alves; Batista, E. (Algebra and Discrete Mathematics, 2009)
    Partial actions of Hopf algebras can be considered as a generalization of partial actions of groups on algebras. Among important properties of partial Hopf actions, it is possible to assure the existence of enveloping ...
  • Semisimple group codes and dihedral codes 
    Dutra, F.S.; Ferraz, R.A.; Milies, C.P. (Algebra and Discrete Mathematics, 2009)
    We consider codes that are given as two-sided ideals in a semisimple finite group algebra FqG defined by idempotents constructed from subgroups of G in a natural way and compute their dimensions and weights. We give a ...
  • The central polynomials for the finite dimensional Grassmann algebras 
    Koshlukov, P.; Krasilnikov, A.; Elida Alves da Silva (Algebra and Discrete Mathematics, 2009)
    In this note we describe the central polynomials for the finite dimensional unitary Grassmann algebras Gk over an infinite field F of characteristic ≠2. We exhibit a set of generators of C(Gk), the T-space of the central ...

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