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Перегляд Доповіді Національної академії наук України за назвою

Репозиторій DSpace/Manakin

Перегляд Доповіді Національної академії наук України за назвою

Сортувати за: Порядок: Результатів:

  • Mappings with finite length distortion and Riemann surfaces 
    Ryazanov, V.I.; Volkov, S.V. (Доповіді НАН України, 2020)
    We prove a series of criteria in terms of dilatations for the continuous and homeomorphic extension of the map pings with finite length distortion between domains on Riemann surfaces to the boundary. The criterion for the ...
  • Modeling of scenarios for the underground construction planning based on the foresight and cognitive modeling methodologies 
    Pankratova, N.D.; Pankratov, V.A. (Доповіді НАН України, 2021)
    The modeling of scenarios for the underground construction planning is based on the mathematical support of fore sight methodology aimed at the creation of alternative scenarios and the cognitive modeling to build ...
  • Modeling the action of anaerobic biofilm 
    Poliakov, V.L. (Доповіді НАН України, 2021)
    A mathematical problem of the action of a representative biofilm in the absence of oxygen is formulated. The anaerobic process of decomposition of a dissolved organic matter is considered as a two-stage process, proceeding due ...
  • Multi-interval dissipative Sturm—Liouville boundary-value problems with distributional coefficients 
    Goriunov, A.S. (Доповіді НАН України, 2020)
    The paper investigates spectral properties of multi-interval Sturm–Liouville operators with distributional coefficients. Constructive descriptions of all self-adjoint and maximal dissipative/accumulative extensions in ...
  • Multiinterval Sturm–Liouville boundary-value problems with distributional potentials 
    Goriunov, A.S. (Доповіді НАН України, 2014)
    We study the multi-interval boundary-value Sturm–Liouville problems with distributional potentials. For the corresponding symmetric operators boundary triplets are found and the constructive descriptions of all self-adjoint, ...
  • Necessary condition for the existence of a simple closed geodesic on a regular tetrahedron in the spherical space 
    Sukhorebska, D.D. (Доповіді НАН України, 2020)
    In the spherical space the curvature of the tetrahedron’s faces equals 1, and the curvature of the whole tetrahedron is concentrated into its vertices and faces. The intrinsic geometry of this tetrahedron depends on the ...
  • NT-proBNP blood levels in patients with type 2 diabetes mellitus with anemia and after the dapagliflozin treatment 
    Sokolova, L.K.; Pushkarev, V.M.; Belchina, Yu.B.; Pushkarev, V.V.; Furmanova, O.V.; Cherviakova, S.A.; Kovzun, O.I.; Tronko, M.D. (Доповіді НАН України, 2018)
    The content of the brain natriuretic peptide (NT-proBNP) in blood plasma and the activity of 5′-adenosine monophosphate- activated protein kinase (AMPK) in lymphocytes of type 2 diabetes patients with anemia and after the ...
  • On analogs of some classical group theoretical results in Poisson algebras 
    Kurdachenko, L.A.; Pypka, A.A.; Subbotin, I.Ya. (Доповіді НАН України, 2021)
    We investigate the Poisson algebras, in which the n-th hypercenter (center) has a finite codimension. It was established that, in this case, the Poisson algebra P includes a finite-dimensional ideal K such that P/K is ...
  • On analogs of some group-theoretic concepts and results for Leibniz algebras 
    Kurdachenko, L.A.; Subbotin, I.Ya.; Semko, N.N. (Доповіді НАН України, 2018)
    An algebra L over a field F is said to be a Leibniz algebra (more precisely a left Leibniz algebra) if it satisfies the Leibniz identity: [[a, b], c] = [a, [b, c]] – [b, [a, c]] for all a, b, c ∈ L. Leibniz algebras are ...
  • On a new approach to the study of plane boundary-value problems 
    Gutlyanskiĭ, V.Ya.; Ryazanov, V.I.; Yefimushkin, A.S. (Доповіді НАН України, 2017)
    We give a short description of our recent results obtained by a new approach to the boundary-value problems, such as the Dirichlet, Hilbert, Neumann, Poincaré and Riemann problems, for the Beltrami equations and for ...
  • On a possibility of the blocking of DNA specific recognition sites by hydrogen peroxide molecules during ion beam therapy 
    Zdorevskyi, O.O.; Piatnytskyi, D.V.; Volkov, S.N. (Доповіді НАН України, 2019)
    Ion beam therapy is one of the most effective methods in treatment of cancer diseases. But up to nowadays, the mechanism of action of heavy ions on cancer cells has not been determined yet. Study of water fragmentation ...
  • On blow-up solutions and dead zones in semilinear equations 
    Gutlyanskii, V.Ya.; Nesmelova, O.V.; Ryazanov, V.I. (Доповіді НАН України, 2018)
    We study semilinear elliptic equations of the form div(A(z)∇u) = f(u) in Ω⊂ C, where A(z) stands for a symmetric 2×2 matrix function with measurable entries, det A =1, and such that 1/ K |ξ|² ≤ 〈A(z)ξ,ξ〉 ≤ K |ξ|², ξ ∈ R², ...
  • On boundary-value problems for generalized analytic and harmonic functions 
    Gutlyanskiĭ, V.Ya.; Nesmelova, O.V.; Ryazanov, V.I.; Yefimushkin, A.S. (Доповіді НАН України, 2020)
    The present paper is a natural continuation of our last articles on the Riemann, Hilbert, Dirichlet, Poincaré, and, in particular, Neumann boundary-value problems for quasiconformal, analytic, harmonic functions and the ...
  • On boundary value problems in domains without (A)-condition 
    Gutlyanskii, V.Ya.; Ryazanov, V.I.; Yakubov, E.; Yefimushkin, A.S. (Доповіді НАН України, 2019)
    We study the Hilbert boundaryvalue problem for the Beltrami equations in the Jordan domains satisfying the quasihyperbolic boundary condition by Gehring—Martio, generally speaking, without the standard (A)condition by ...
  • On exact solutions of the nonlinear heat equation 
    Barannyk, A.F.; Barannyk, T.A.; Yuryk, I.I. (Доповіді НАН України, 2019)
    A method for construction of exact solutions to the nonlinear heat equation ut = (F (u)ux)x + G (u)ux + H (u), which is based on the ansatz p(x) = ω₁(t) φ(u) + ω₂(t), is proposed. The function p(x) is a solution of the ...
  • On Fredholm parameter-dependent boundary-value problem in Sobolev spaces 
    Atlasiuk, O.M.; Mikhailets, V.A. (Доповіді НАН України, 2020)
    We consider the most general class of linear inhomogeneous boundary-value problems for systems of r-th order ordinary differential equations whose solutions and right-hand sides belong to appropriate Sobolev spaces. ...
  • On groups, whose non-normal subgroups are either contranormal or core-free 
    Kurdachenko, L.A.; Pypka, A.A.; Subbotin, I.Ya. (Доповіді НАН України, 2020)
    We investigate the influence of some natural types of subgroups on the structure of groups. A subgroup H of a group G is called contranormal in G, if G = H^G. A subgroup H of a group G is called core-free in G, if CoreG(H) ...
  • On ideals and contraideals in Leibniz algebras 
    Kurdachenko, L.A.; Subbotin, I.Ya.; Yashchuk, V.S. (Доповіді НАН України, 2020)
    A subalgebra S of a Leibniz algebra L is called a contraideal, if an ideal, generated by S coincides with L. We study the Leibniz algebras, whose subalgebras are either an ideal or a contraideal. Let L be an algebra over ...
  • On induced modules over locally Abelian-by-polycyclic groups of finite rank 
    Tushev, A.V. (Доповіді НАН України, 2019)
    We develop some methods for studying the modules over group rings, which are based on properties of induced modules and on the embedding of these modules in the modules over rings of quotients of group rings. Using these ...
  • On Leibniz algebras, whose subideals are ideals 
    Kurdachenko, L.A.; Subbotin, I.Ya.; Yashchuk, V.S. (Доповіді НАН України, 2017)
    We obtain a description of solvable Leibniz algebras, whose subideals are ideals. A description of certain types of Leibniz T-algebras is also obtained. In particular, it is established that the structure of Leibniz ...

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