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Перегляд Український математичний вісник за назвою

Репозиторій DSpace/Manakin

Перегляд Український математичний вісник за назвою

Сортувати за: Порядок: Результатів:

  • An extremal problem for the non-overlapping domains 
    Targonskii, A. (Український математичний вісник, 2017)
    Sharp estimates of product of inner radii for pairwise disjoint domains are obtained. In particular, we solve an extremal problem in the case of arbitrary finite number of free poles on the system points on the rays.
  • An operator approach to indefinite Stieltjes moment problem 
    Derkach, V.A.; Kovalyov, I.M. (Український математичний вісник, 2017)
    In the present paper we solve the indefinite Stieltjes moment problem MPkκ(s) within the M.G. Krein theory of u-resolvent matrices applied to a Pontryagin space symmetric operator A[0,N] generated by J[0,N]. The u-resolvent ...
  • Application of the Thomas precession to the deformations of a rotating disk 
    Celakoska, E.G.; Trecevski, K.; Balan, V. (Український математичний вісник, 2009)
    Within the framework of Special Relativity, the recent paper [1] describes the shrinking determined by the rotation of a planar disk, and an apparent paradox emerging from the anisotropic outcoming contraction. In this ...
  • Approximate controllability of the wave equation with mixed boundary conditions 
    Pestov, L.; Strelnikov, D. (Український математичний вісник, 2018)
    We consider initial boundary-value problem for acoustic equation in the time space cylinder Ω×(0, 2T) with unknown variable speed of sound, zero initial data, and mixed boundary conditions. We assume that (Neumann) controls ...
  • Approximative properties of the Weierstrass integrals on the classes WrβHα 
    Grabova, U.Z.; Kal'chuk, I.V.; Stepaniuk, T.A. (Український математичний вісник, 2017)
    The work focuses on the solution of a problem of approximation theory. The task is to investigate approximative properties of the Weierstrass integrals on the classes WrβHα. We obtain asymptotic equalities for the upper ...
  • Asymptotic Expansion of Markov Random Evolution 
    Samoilenko, I.V. (Український математичний вісник, 2006)
    It is studied asymptotic expansion for solution of singularly perturbed equation for Markov random evolution in Rd. The views of regular and singular parts of solution are found.
  • Asymptotic Solution to a Mixed Boundary-Value Problem in a Thick Multi-Structure of Type 3:2:2 
    De Maio, U.; Mel'nyk, T.A. (Український математичний вісник, 2005)
    The leading terms of the asymptotic expansion for the solution to a mixed boundary value problem for the Poisson equation in a thick multi-structure, which is the union of some domain and a large number N of ε-periodically ...
  • A truncated indefinite Stieltjes moment problem 
    Kovalyov, I.M. (Український математичний вісник, 2016)
    A truncated indefinite Stieltjes moment problem in the class Nkκ of generalized Stieltjes functions is studied. The set of solutions of Stieltjes moment problem is described by Schur step-by-step algorithm, which is based ...
  • Automorphisms of semigroups of k-linked upfamilies 
    Gavrylkiv, V.M. (Український математичний вісник, 2017)
    In the paper, we study automorphisms of the extensions of groups, finite monogenic semigroups and describe the automorphism groups of extensions of null semigroups, almost null semigroups, right zero semigroups and left ...
  • Balleans of topological groups 
    Hernández, S.; Protasov, I.V. (Український математичний вісник, 2011)
    A subset S of a topological group G is called bounded if, for every neighborhood U of the identity of G, there exists a finite subset F such that S ⊆ FU, S ⊆ UF. The family of all bounded subsets of G determines two ...
  • Bernstein-Walsh type inequalities in unbounded regions with piecewise asymptotically conformal curve in the weighted Lebesgue space 
    Imashkyzy, M.; Abdullayev, G.A.; Abdullayev, F.G. (Український математичний вісник, 2017)
    In this work, we obtain pointwise Bernstein–Walsh-type estimation for algebraic polynomials in the unbounded regions with piecewise asymptotically conformal boundary, having exterior and interior zero angles, in the weighted ...
  • Blow-up phenomena arising in a reaction-absorption-diffusion equation with gradient diffusivity 
    Chaves, M. (Український математичний вісник, 2004)
    We study the blow-up phenomena arising in a p-laplacian equation with reaction and absorption terms. We show that there exists a unique blowing-up approximate self-similar solution which describe the asymptotic singular ...
  • Boundary triples for integral systems on finite intervals 
    Strelnikov, D. (Український математичний вісник, 2017)
  • Bounded Components of Positive Solutions of Nonlinear Abstract Equations 
    Cano-Casanova, S.; Lopez-Gomez, J.; Molina-Meyer, M. (Український математичний вісник, 2005)
    In this work a general class of nonlinear abstract equations satisfying a generalized strong maximum principle is considered in order to show that any bounded component of positive solutions bifurcating from the curve of ...
  • Coarse rays 
    Kuchaiev, O.; Protasov, I.V. (Український математичний вісник, 2008)
    We give some characterizations of geodesic metric spaces coarsely equivalent to the ray R⁺.
  • Completion and extension of operators in Krein spaces 
    Baidiuk, D. (Український математичний вісник, 2016)
    A generalization of the well-known results of M.G. Kreiın on the description of the self-adjoint contractive extension of a Hermitian contraction is obtained. This generalization concerns the situation where the self-adjoint ...
  • Constructing balleans 
    Banakh, T.; Protasov, I. (Український математичний вісник, 2018)
    A ballean is a set endowed with a coarse structure.We introduce and explore three constructions of balleans from a pregiven family of balleans: bornological products, bouquets, and combs. We analyze also the smallest and ...
  • Convolution equations and mean value theorems for solutions of linear elliptic equations with constant coefficients in the complex plane 
    Trofymenko, O.D. (Український математичний вісник, 2017)
    In terms of the Bessel functions we characterize smooth solutions of some convolution equations in the complex plane and prove a two-radius theorem for solutions of homogeneous linear elliptic equations with constant ...
  • Differential operator rings over 2-primal rings 
    Bhat, V.K. (Український математичний вісник, 2008)
    Let R be a ring, and δ be a derivation of R. It is proved that R is a 2-primal Noetherian Q-algebra implies that the differential operator ring R[x, δ] is a 2-primal Noetherian.
  • Discontinuous Birkhoff theorem 
    Petrenko, O.; Protasov, I.V. (Український математичний вісник, 2007)
    A topological space X is called totally recurrent if every mapping f : X → X has a recurrent point. We prove that a Hausdorff space X is totally recurrent if and only if X is either finite or a one-point compactification ...

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