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Репозиторій DSpace/Manakin

Перегляд Український математичний вісник за назвою

Сортувати за: Порядок: Результатів:

  • 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 ...
  • Entropy of the Shift on II₁-representations of the Group S(∞) 
    Boyko, M.S.; Nessonov, N.I. (Український математичний вісник, 2005)
    We have obtained the explicit formulae for the CNT-entropy of the shift on II₁-representations of the infinite symmetric group S(∞) in terms of Thoma-parameters.
  • Estimates of the inner radii of non-overlapping domains 
    Denega, I. (Український математичний вісник, 2019)
    The paper is devoted to extremal problems of the geometric function theory of complex variable related with estimates of functionals defined on systems of non-overlapping domains. Till now, many such problems have not been ...
  • Expansions of solutions to the equation P₁² by algorithms of power geometry 
    Bruno, A.D.; Kudryashov, N.A. (Український математичний вісник, 2009)
    Algorithms of Power Geometry allow to find all power expansions of solutions to ordinary differential equations of a rather general type. Among these, there are Painlev´e equations and their generalizations. In the article ...
  • Extremal decomposition of multidimensional complex space for five domains 
    Zabolotni, i Y.; Denega, I. (Український математичний вісник, 2018)
    The paper is devoted to one open extremal problem in the geometric function theory of complex variables associated with estimates of a functional defined on the systems of non-overlapping domains. We consider the problem ...
  • Extremal quasiconformality vs bounded rational approximation 
    Krushkal, S.L. (Український математичний вісник, 2019)
    We show that, on most of the hyperbolic simply connected domains, the weighty bounded rational approximation in a natural sup norm is possible only for a very sparse set of holomorphic functions (in contrast to the integral ...
  • Factorization of generalized γ-generating matrices 
    Sukhorukova, O. (Український математичний вісник, 2017)
    The class of γ–generating matrices and its subclasses of regular and singular γ–generating matrices were introduced by D. Z. Arov in [8], where it was shown that every γ-generating matrix admits an essentially unique ...
  • Finite spaces pretangent to metric spaces at infinity 
    Bilet V., V.; Dovgoshey O., O. (Український математичний вісник, 2018)
  • Fundamental solutions of boundary problems and resolvents of differential operators 
    Mogilevskii, V. (Український математичний вісник, 2009)
    The main objects of our considerations are differential operators generated by a formally selfadjoint differential expression of an even order. The coefficients of this expression are operator valued functions defined on ...
  • Fuzzy strongly pre-irresolute functions 
    Gowrisankar, N.; Rajesh, N. (Український математичний вісник, 2010)
    In this paper, we have introduced and studied a new class of fuzzy irresolute functions, called fuzzy strongly pre-irresolute functions by using fuzzy preopen sets.
  • General Beltrami equations and BMO 
    Bojarski, B.V.; Gutlyanskii, V.V.; Ryazanov, V.I. (Український математичний вісник, 2008)
    We study the Beltrami equations ∂f = μ(z)∂f + ν(z)∂f under the assumption that the coefficients μ, ν satisfy the inequality |μ| + |ν| < 1 almost everywhere. Sufficient conditions for the existence of homeomorphic ACL ...
  • Generalized integral theorems for the quaternionic G-monogenic mappings 
    Kuzmenko, T.S.; Shpakivskyi, V.S. (Український математичний вісник, 2016)
    For G-monogenic mappings taking values in the algebra of complex quaternions, we generalize some analogues of classical integral theorems of the holomorphic function theory of complex variable (the surface and curvilinear ...
  • Global asymptotic stability of a higher order difference equation 
    Hamza, A.E.; Khalaf-Allah, R. (Український математичний вісник, 2007)
    The aim of this work is to investigate the global stability, periodic nature, oscillation and boundedness of solutions of the difference equation.
  • Global Mandelbrot transformation for Maslov tunnel pseudodifferential equations 
    Danilov, V.G. (Український математичний вісник, 2008)
    We construct the global in time Mandelbrot transformation relating the solution of the transport equation at nonsingular points for the tunnel in the sense of Maslov LPDE to the global generalized deltashock wave type ...
  • Group Classification of Systems of Non-Linear Reaction-Diffusion Equations 
    Nikitin, A.G. (Український математичний вісник, 2005)
    The completed group classification of systems of two coupled nonlinear reaction-diffusion equation with general diffusion matrix is carried out. The simple and convenient method for deduction and solution of classifying ...

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