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Перегляд Algebra and Discrete Mathematics, 2013, Vol. 15, Vol. 16 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2013, Vol. 15, Vol. 16 за датою випуску

Сортувати за: Порядок: Результатів:

  • Regular pairings of functors and weak (co)monads 
    Wisbauer, R. (Algebra and Discrete Mathematics, 2013)
    For functors L : A → B and R : B → A between any categories A and B, a pairing is defined by maps, natural in A ∈ A and B ∈ B, MorB(L(A), B) ↔ MorA(A, R(B)). (L, R) is an adjoint pair provided α (or β) is a bijection. ...
  • Generalised triangle groups of type (3, q, 2) 
    Howie, J. (Algebra and Discrete Mathematics, 2013)
    If G is a group with a presentation of the form ⟨x, y|x³ = yq = W(x, y)² = 1⟩, then either G is virtually soluble or G contains a free subgroup of rank 2. This provides additional evidence in favour of a conjecture of Rosenberger.
  • On one class of semiperfect semidistributive rings 
    Kasyanuk, M. (Algebra and Discrete Mathematics, 2013)
    In this paper we consider the Artinian semidistributive rings.
  • On normalizers in fuzzy groups 
    Kurdachenko, L.A.; Grin, K.O.; Turbay, N.A. (Algebra and Discrete Mathematics, 2013)
    In an arbitrary fuzzy group we define the normalizer of fuzzy subgroup and study some its properties. In particular, the characterization of nilpotent fuzzy group has been obtained.
  • Function algebras on rectangular bands 
    Maxson, C.J. (Algebra and Discrete Mathematics, 2013)
    We investigate function algebras determined by rectangular bands. The focus is on maximal semirings within these function algebras and invariants associated with certain mutations.
  • Infinitely iterated wreath products of metric spaces 
    Oliynyk, B. (Algebra and Discrete Mathematics, 2013)
    The construction of the finitary wreath product of metric spaces and its completion, the infinitely iterated wreath product of metric spaces are introduced. They full isometry groups are described. Some properties and ...
  • On elementary domains of partial projective representations of groups 
    Pinedo, H. (Algebra and Discrete Mathematics, 2013)
    We characterize the finite groups containing only elementary domains of factor sets of partial projective representations. A condition for a finite subset A of a group G, which contains the unity of the group, to induce ...
  • Associative words in the symmetric group of degree three 
    Plonka, E. (Algebra and Discrete Mathematics, 2013)
    Let G be a group. An element w(x, y) of the absolutely free group on free generators x, y is called an associative word in G if the equality w(w(g₁, g₂), g₃)=w(g₁, w(g₂, g₃)) holds for all g₁, g₂ ∈ G. In this paper we ...
  • Weighted zero-sum problems over C₃ʳ 
    Godinho, H.; Lemos, A.; Marques, D. (Algebra and Discrete Mathematics, 2013)
    Let Cn be the cyclic group of order n and set sA(Crn) as the smallest integer ℓ such that every sequence S in Cʳn of length at least ℓ has an A-zero-sum subsequence of length equal to exp(Cʳn), for A = {−1, 1}. In this ...
  • The diagonal limits of Hamming spaces 
    Oliynyk, B. (Algebra and Discrete Mathematics, 2013)
    We consider a continuum family of subspaces of the Besicovitch-Hamming space on some alphabet B, naturally parametrized by supernatural numbers. Every subspace is defined as a diagonal limit of finite Hamming spaces on the ...
  • The p–gen nature of M₀(V ) (I) 
    Scott, S.D. (Algebra and Discrete Mathematics, 2013)
    Let V be a finite group (not elementary two) and p ≥ 5 a prime. The question as to when the nearring M₀(V) of all zero-fixing self-maps on V is generated by a unit of order p is difficult. In this paper we show M₀(V) is ...
  • Groups with many pronormal and transitively normal subgroups 
    Semko (Jr.), N.N. (Algebra and Discrete Mathematics, 2013)
    A subgroup H of a group G is said to be transitively normal in G, if H is normal in every subgroup K ≥ H such that H is subnormal in K. The study of radical groups, whose not finitely generated subgroups are transitively ...
  • Representations of nodal algebras of type A 
    Drozd, Yu.; Zembyk, V. (Algebra and Discrete Mathematics, 2013)
    We define nodal finite dimensional algebras and describe their structure over an algebraically closed field. For a special class of such algebras (type A) we find a criterion of tameness.
  • On the structure of skew groupoid rings which are Azumaya 
    Flores, D.; Paques, A. (Algebra and Discrete Mathematics, 2013)
    In this paper we present an intrinsic description of the structure of an Azumaya skew groupoid ring, having its center contained in the respective ground ring, in terms of suitable central Galois algebras and commutative ...
  • Petro Mykhailovych Gudivok 
    Babych, M.; Bondarenko, V.M.; Drozd, Yu.; Kirichenko, V.; Shapochka, I. (Algebra and Discrete Mathematics, 2013)
    We present a brief scientific biography of Professor Petro M. Gudivok.
  • A maximal T-space of F₃[x]₀ 
    Bekh-Ochir, C.; Rankin, S.A. (Algebra and Discrete Mathematics, 2013)
    In earlier work, we have established that for any finite field k, the free associative k-algebra on one generator x, denoted by k[x]₀, has infinitely many maximal T-spaces, but exactly two maximal T-ideals (each of which ...
  • Reducibility and irreducibility of monomial matrices over commutative rings 
    Bondarenko, V.M.; Bortos, M.Yu.; Dinis, R.F.; Tylyshchak, A.A. (Algebra and Discrete Mathematics, 2013)
  • Differential graded categories associated with the critical semi-definite quadratic forms 
    Gnatiuk, O.; Golovaschuk, N. (Algebra and Discrete Mathematics, 2013)
    This work concerns with classification problem of differential graded categories with critical semi-definite quadratic form. We prove that such problem which satisfies some correctness conditions can be transformed to ...
  • Serial group rings of finite groups. p-solvability 
    Kukharev, A.; Puninski, G. (Algebra and Discrete Mathematics, 2013)
    We prove that for any finite p-solvable group G with a cyclic p-Sylow subgroup and any field F of characteristic p, the group ring FG is serial. As a corollary for an arbitrary field we will produce a list of all groups ...
  • Automorphic equivalence of the representations of Lie algebras 
    Shestakov, I.; Tsurkov, A. (Algebra and Discrete Mathematics, 2013)
    In this paper we research the algebraic geometry of the representations of Lie algebras over fixed field k. We assume that this field is infinite and char (k) = 0. We consider the representations of Lie algebras as 2-sorted ...

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