Наукова електронна бібліотека
періодичних видань НАН України

Перегляд Український математичний журнал за назвою

Репозиторій DSpace/Manakin

Перегляд Український математичний журнал за назвою

Сортувати за: Порядок: Результатів:

  • Rank formulae for factorized groups 
    Amberg, B.; Franciosi, S.; De Giovanni, F. (Український математичний журнал, 1991)
  • Rate of convergence for Szász-Bézier operators 
    Gupta Vijay (Український математичний журнал, 2005)
    We estimate the rate of convergence for functions of bounded variation for the Bezier variant of the Szasz operators Sₙ,ₐ(f,x). We study the rate of convergence of Sₙ,ₐ(f,x) for the case 0 < α < 1.
  • R-D-системы и ветвящиеся процессы Иржины 
    Сафарян, Р.Г. (Український математичний журнал, 1991)
    Для параболического уравнения, содержащего нелинейную часть специального вида, строится вероятностное представление решения в виде математического ожидания некоторого функционала от траекторий ветвящегося процесса с ...
  • Recognition of the groups L₅(4) and U₄(4) by the prime graph 
    Nosratpour, P.; Darafsheh, M.R. (Український математичний журнал, 2012)
    Let G be a finite group. The prime graph of G is the graph Γ(G) whose set of vertices is the set Π(G) of all prime divisors of the order |G| and two different vertices p and q of which are connected by an edge if G has an ...
  • Reduction of the self-dual Yang-Mills equations. I. The Poincaré group 
    Zhdanov, R.Z.; Lahno, V.I.; Fushchych, W.I. (Український математичний журнал, 1995)
    For the vector potential of the Yang-Mills field, we give a complete description of ansatzes invariant under three-parameterP (1, 3) -inequivalent subgroups of the Poincaré group. By using these ansatzes, we reduce the ...
  • Re-extending Chebyshev’s theorem about Bertrand’s conjecture 
    Shams, Armіn (Український математичний журнал, 2007)
    In this paper, Chebyshev’s theorem (1850) about Bertrand’s conjecture is re-extended using a theorem about Sierpinski’s conjecture (1958). The theorem had been extended before several times, but this extension is a major ...
  • Regularity of nonlinear flows on noncompact Riemannian manifolds: Differential geometry versus stochastic geometry or what kind of variations is natural? 
    Antoniouk, A.Val.; Antoniouk, Vict. (Український математичний журнал, 2006)
    It is shown that the geometrically correct investigation of regularity of nonlinear differential flows on manifolds and related parabolic equations requires the introduction of a new type of variations with respect to the ...
  • Regularity results for Kolmogorov equations in L²(H, μ) spaces and applications 
    Da Prato, G. (Український математичний журнал, 1997)
    We consider the transition semigroup Rt =e tsA associated to an Ornstein—Uhlenbeck process in a Hilbert space H. We characterize, under suitable assumptions, the domain of A as a subspace W²,²(H, μ), where μ is the invariant ...
  • Regularized brownian motion on the Siegel disk of infinite dimension 
    Airault, H.; Malliavin, P. (Український математичний журнал, 2000)
    We construct a process of Brownian motion on the Siegel disk of infinite dimension.
  • Relative Extensions of Modules and Homology Groups 
    Lixin Mao; Haiyan Zhu (Український математичний журнал, 2015)
    We introduce the concepts of relative (co)extensions of modules and explore the relationship between the relative (co)extensions of modules and relative (co)homology groups. Some applications are given.
  • Relatively thin and sparse subsets of groups 
    Lutsenko, Ie.; Protasov, I.V. (Український математичний журнал, 2011)
    Let G be a group with identity e and let I be a left-invariant ideal in the Boolean algebra PG of all subsets of G. A subset A of G is called I-thin if gA⋂A∈I for every g∈G {e}. A subset A of G is called I-sparse if, for ...
  • Remainders of semitopological groups or paratopological groups 
    Lin, Fucai; Liu, Chuan; Xie, Li-Hong (Український математичний журнал, 2014)
    We mainly discuss the remainders of Hausdorff compactifications of paratopological groups or semitopological groups. Thus, we show that if a nonlocally compact semitopological group G has a compactification bG such that ...
  • Remarks on certain identities with derivations on semiprime rings 
    Fosner, A.; Baydar, N.; Strasek, R. (Український математичний журнал, 2014)
    Let n be a fixed positive integer, let R be a (2n)! -torsion-free semiprime ring, let α be an automorphism or an anti-automorphism of R, and let D₁,D₂:R→R be derivations. We prove the following result: If (D²₁(x) + D₂(x) ...
  • Remarks on monotone and convex approximation by algebraic polynomials 
    Kopotun, K.A.; Listopad, V.V. (Український математичний журнал, 1994)
  • Remarks on summability of series formed of deviation probabilities of sums of independent identically distributed random variables 
    Pruss. A.R. (Український математичний журнал, 1996)
  • Renormalization constant for the local times of self-intersections of a diffusion process in the plane 
    Izyumtseva, O.L. (Український математичний журнал, 2008)
    The self-intersection local times of a diffusion process in the plane are studied. The main result consists in investigating asymptotic behavior of renormalizing constant for this local time.
  • Representation of a solution of the Cauchy problem for an oscillating system with two delays and permutable matrices 
    Diblík, J.; Fečkan, M.; Pospíšil, M. (Український математичний журнал, 2013)
    We represent a solution of an inhomogeneous second-order differential equation with two delays by using matrix functions under the assumption that the linear parts are given by permutable matrices.
  • Resolvent kernels that constitute an approximation of the identity and linear heat-transfer problems 
    Berrone, L.R. (Український математичний журнал, 2000)
    Sufficient conditions are obtained for a Volterra integral equation whose kernel depends on an increasing parameter a to admit an approximation of the identity with respect to a in the form of a resolvent kernel. In this ...
  • Resonance and nonlinearity: a survey 
    Mawhin, J. (2007)
    Наведено огляд останніх результатів щодо нерезонансних і резонансних періодично збуджуваних нелінійних осциляторів: існування періодичних необмежених або обмежених розв'язків для обмежених нелінійних збурень лінійних та ...
  • Rings with finite decomposition of identity 
    Dokuchaev, M.A.; Gubareni, N.M.; Kirichenko, V.V. (Український математичний журнал, 2011)
    A criterion for semiprime rings with finite decomposition of identity to be prime is given. We also give a short survey on some finiteness conditions related to the decomposition of identity. We consider the notion of a ...

Пошук


Розширений пошук

Перегляд

Мій обліковий запис