Наукова електронна бібліотека
періодичних видань НАН України

Перегляд Відділення математики за назвою

Репозиторій DSpace/Manakin

Перегляд Відділення математики за назвою

Сортувати за: Порядок: Результатів:

  • Uniqueness of spaces pretangent to metric spaces at infinity 
    Dovgoshey, O.; Bilet, V. (Український математичний вісник, 2019)
    We find the necessary and sufficient conditions under which an unbounded metric space X has, at infinity, a unique pretangent space Ωˣ∞, ř for every scaling sequence ř. In particular, it is proved that Ωˣ∞, ř is unique and ...
  • A uniqueness theorem for the martingale problem describing a diffusion in media with membranes 
    Aryasova, O.V.; Portenko, M.I. (2008)
    We formulate a martingale problem that describes a diffusion process in a multidimensional Euclidean space with a membrane located on a given mooth surface and having the properties of skewing and delaying. The theorem on ...
  • Unital A∞-categories 
    Lyubashenko, V.; Manzyuk, O. (2006)
    Ми доводимо, що три означення унiтальностi для A∞-категорiй запропонованi Любашенком, Концевичем i Сойбельманом, та Фукая є еквiвалентними.
  • Unitarizable and non-unitarizable represenations of algebras generated by idempotents 
    Popovych, S.; Turowska, L. (Algebra and Discrete Mathematics, 2004)
    The problem of unitarization of representations of algebras generated by idempotents with linear relations is studied. Construction of non-unitarizable representations for some subintervals of continuous spectrum is ...
  • Unitary colligations and parametrization formulas 
    Arocena, R. (Український математичний журнал, 1994)
    This paper aims to describe, in a rather sketchy but relatively selfcontained way, some relations between the unitary colligations, which are regarded as linear systems, and the parametrization formulas for the solutions ...
  • Units of some group algebras of groups of order 12 over any finite field of characteristic 3 
    Gildea, J.; Monaghan, F. (Algebra and Discrete Mathematics, 2011)
    The structure of the unit groups of the group algebra of the groups D₁₂ and C₃⋊C₄ over any finite field of characteristic 3 is established.
  • Universal Bethe Ansatz and Scalar Products of Bethe Vectors 
    Belliard, S.; Pakuliak, S.; Ragoucy, E. (Symmetry, Integrability and Geometry: Methods and Applications, 2010)
    An integral presentation for the scalar products of nested Bethe vectors for the quantum integrable models associated with the quantum affine algebra Uq(gl₃) is given. This result is obtained in the framework of the universal ...
  • Universal bounds for global solutions of nonlinear parabolic equations 
    Fila, M. (Нелинейные граничные задачи, 2002)
    In this survey we consider parabolic problems for which blow-up in finite time occurs for some initial data but global positive solutions may also exist. We present results on universal L∞-bounds for global positive ...
  • Universal Lie Formulas for Higher Antibrackets 
    Manetti, M.; Ricciardi, G. (Symmetry, Integrability and Geometry: Methods and Applications, 2016)
    We prove that the hierarchy of higher antibrackets (aka higher Koszul brackets, aka Koszul braces) of a linear operator Δ on a commutative superalgebra can be defined by some universal formulas involving iterated ...
  • Universal Low Temperature Asymptotics of the Correlation Functions of the Heisenberg Chain 
    Crampé, N.; Göhmann, F.; Klümper, A. (Symmetry, Integrability and Geometry: Methods and Applications, 2010)
    We calculate the low temperature asymptotics of a function γ that generates the temperature dependence of all static correlation functions of the isotropic Heisenberg chain.
  • Universal property of skew PBW extensions 
    Acosta, J,.P.; Lezama, O. (Algebra and Discrete Mathematics, 2015)
    In this paper we prove the universal property of skew $PBW$ extensions generalizing this way the well known universal property of skew polynomial rings. For this, we will show first a result about the existence of this ...
  • Un-Reduction of Systems of Second-Order Ordinary Differential Equations 
    García-Toraño Andrés, E.; Mestdag, T. (Symmetry, Integrability and Geometry: Methods and Applications, 2016)
    In this paper we consider an alternative approach to ''un-reduction''. This is the process where one associates to a Lagrangian system on a manifold a dynamical system on a principal bundle over that manifold, in such a ...
  • Upper Bounds for Mutations of Potentials 
    Cruz Morales, J.A.; Galkin, S. (Symmetry, Integrability and Geometry: Methods and Applications, 2013)
    In this note we provide a new, algebraic proof of the excessive Laurent phenomenon for mutations of potentials (in the sense of [Galkin S., Usnich A., Preprint IPMU 10-0100, 2010]) by introducing to this theory the analogue ...
  • Upper bounds of maximum values of average differential and linear characteristic probabilities of feistel cipher with adder modulo 2^m 
    Alekseychuk, A.; Kovalchuk, L. (2006)
    The paper discusses the Feistel cipher with a block size of n = 2m, where the addition of a round key and a part of an incoming massage in each round is carried out modulo 2^m. In order to evaluate the security of such ...
  • Upper bounds on second order operators, acting on metric function 
    Antoniouk, A.V. (Український математичний вісник, 2007)
    We prove upper bounds on the general second order operator acting on metric function. The suggested approach does not use traditional formulas for deviations of geodesics and Jacobi fields construction and leads to the ...
  • Upper Subrings of a Ring 
    Katani, R.; Miccoli, M.M. (Український математичний журнал, 2001)
    We describe maximal ideals of rings that are contained in the adjoint groups of their upper subrings.
  • U-статистики от бутстрэп-выборки 
    Королюк, В.С.; Боровских, Ю.В. (Український математичний журнал, 1990)
    Рассматривается асимптотика распределений статиски типа бипа бутстрэп.
  • Vacuum Energy as Spectral Geometry 
    Fulling, S.A. (Symmetry, Integrability and Geometry: Methods and Applications, 2007)
    Quantum vacuum energy (Casimir energy) is reviewed for a mathematical audience as a topic in spectral theory. Then some one-dimensional systems are solved exactly, in terms of closed classical paths and periodic orbits. ...
  • Vadim Kuznetsov. Informal Biography by Eyes of His First Adviser 
    Komarov, I.V. (Symmetry, Integrability and Geometry: Methods and Applications, 2007)
    The paper is dedicated to the memory of prominent theoretical physicist and mathematician Dr. Vadim Kuznetsov who worked, in particular, in the fields of the nonlinear dynamics, separation of variables, integrability theory, ...
  • Value distribution of general Dirichlet series. VIII 
    Laurincikas, A. (Algebra and Discrete Mathematics, 2006)
    A joint limit theorem on the complex plane for a new class of general Dirichlet series is proved.

Пошук


Розширений пошук

Перегляд

Мій обліковий запис