Наукова електронна бібліотека
періодичних видань НАН України

Перегляд Algebra and Discrete Mathematics, 2003, № 1 за назвою

Репозиторій DSpace/Manakin

Перегляд Algebra and Discrete Mathematics, 2003, № 1 за назвою

Сортувати за: Порядок: Результатів:

  • Green’s relations on the seminearring of full hypersubstitutions of type (n) 
    Changphas, Th.; Denecke, K. (Algebra and Discrete Mathematics, 2003)
    Hypersubstitutions are mappings which are used to define hyperidentities and solid varieties. In this paper we will show that the set of all hypersubstitutions of a given type forms a seminearring. We will give a full ...
  • Hyperbolic spaces from self-similar group actions 
    Nekrashevych, V. (Algebra and Discrete Mathematics, 2003)
    We show that the limit space of a contracting selfsimilar group action is the boundary of a naturally defined Gromov hyperbolic space.
  • Multi-algebras from the viewpoint of algebraic logic 
    Cırulis, J. (Algebra and Discrete Mathematics, 2003)
    Where U is a structure for a first-order language L ≈ with equality ≈, a standard construction associates with every formula f of L ≈ the set kfk of those assignments which fulfill f in U. These sets make up a (cylindric ...
  • On intersections of normal subgroups in free groups 
    Kulikova, O.V. (Algebra and Discrete Mathematics, 2003)
    Let N₁ (respectively N₂) be a normal closure of a set R₁ = {ui} (respectively R₂ = {vj}) of cyclically reduced words of the free group F(A). In the paper we consider geometric conditions on R₁ and R₂ for N₁ ∩ N₂ = [N₁, ...
  • Principal quasi-ideals of cohomological dimension 1 
    Novikov, B.V. (Algebra and Discrete Mathematics, 2003)
    We prove that a principal quasi-ideal of a noncommutative free semigroup has cohomological dimension 1 if and only if it is free.
  • Ramseyan variations on symmetric subsequences 
    Verbitsky, O. (Algebra and Discrete Mathematics, 2003)
    A theorem of Dekking in the combinatorics of words implies that there exists an injective order-preserving transformation f : {0, 1, . . . , n} → {0, 1, . . . , 2n} with the restriction f(i + 1) ≤ f(i) + 2 such that for ...
  • Uniform ball structures 
    Protasov, I.V. (Algebra and Discrete Mathematics, 2003)
    A ball structure is a triple B = (X, P, B), where X, P are nonempty sets and, for all x ∈ X, α ∈ P, B(x, α) is a subset of X, x ∈ B(x, α), which is called a ball of radius α around x. We introduce the class of uniform ...
  • Uniform ball structures 
    Protasov, I.V. (Algebra and Discrete Mathematics, 2003)
    A ball structure is a triple B = (X, P, B), where X, P are nonempty sets and, for all x ∈ X, α ∈ P, B(x, α) is a subset of X, x ∈ B(x, α), which is called a ball of radius α around x. We introduce the class of uniform ...

Пошук


Розширений пошук

Перегляд

Мій обліковий запис