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Перегляд Український математичний журнал, 2012, том 64 за темою "Статті"

Репозиторій DSpace/Manakin

Перегляд Український математичний журнал, 2012, том 64 за темою "Статті"

Сортувати за: Порядок: Результатів:

  • A comonotonic theorem for backward stochastic differential equations in Lp and its applications 
    Zong, Z.J. (Український математичний журнал, 2012)
    We study backward stochastic differential equations (BSDE) under weak assumptions on the data. We obtain a comonotonic theorem for BSDE in Lp; 1 < p ≤ 2: As applications of this theorem, we study the relation between Choquet ...
  • A companion of Dragomir’s generalization of the Ostrowski inequality and applications to numerical integration 
    Alomari, M.W. (Український математичний журнал, 2012)
    Some analogs of Dragomir’s generalization of the Ostrowski integral inequality are established. Some sharp inequalities are proved. An application to the composite quadrature rule is provided.
  • A new application of generalized quasipower increasing sequences 
    Bor, H. (Український математичний журнал, 2012)
    We prove a theorem on ∣ N¯,pn,θn ∣k-summability by using a new general class of power increasing sequences instead of a quasi-η-power increasing sequence. This theorem also includes some new and known results.
  • A New Method for Generating Traveling-Wave Solutions of Coupled Nonlinear Equations 
    Jiuli Yin; Shanyu Ding; Lixin Tian; Xinghua Fan (Український математичний журнал, 2012)
    We propose a new method of algebraic transformations aimed at finding the traveling-wave solutions of complicated nonlinear wave equations on the basis of simpler equations. The generalized Dullin–Gottwald–Holm (DGH) ...
  • Approximation of the Urysohn operator by operator polynomials of Stancu type 
    Demkiv, I.I.; Makarov, V.L. (Український математичний журнал, 2012)
    We study a one-parameter family of positive polynomial operators of one and two variables that approximate the Urysohn operator. In the case of two variables, the integration domain is an “isosceles right triangle.” As a ...
  • A result on generalized derivations on right ideals of prime rings 
    Demir, C.; Arga, N. (Український математичний журнал, 2012)
    Let R be a prime ring of characteristic other than 2 and let I be a nonzero right ideal of R. Also let U be the right Utumi quotient ring of R and let C be the center of U. If G is a generalized derivation of R such that ...
  • A study on tensor product surfaces in low-dimensional Euclidean spaces 
    Etemad Dehkordy, A. (Український математичний журнал, 2012)
    We consider a special case for curves in two-, three-, and four-dimensional Euclidean spaces and obtain a necessary and sufficient condition for the tensor product surfaces of the planar unit circle centered at the origin ...
  • Balleans and G-spaces 
    Petrenko, O.V.; Protasov, I.V. (Український математичний журнал, 2012)
    We show that every ballean (equivalently, coarse structure) on a set X can be determined by some group G of permutations of X and some group ideal I on G. We refine this characterization for some basic classes of balleans ...
  • Behavior of solutions of differential equations with deviating argument 
    Hormozi, M. (Український математичний журнал, 2012)
    We give a necessary and sufficient condition for the inclusion of ΛBV (p) in the classes Hq ω.
  • Bicomplex number and tensor product surfaces in R⁴₂ 
    Karakuş, S.Ö.; Yayli, Y. (Український математичний журнал, 2012)
    We show that a hyperquadric M in R⁴₂ is a Lie group by using the bicomplex number product. For our purpose, we change the definition of tensor product. We define a new tensor product by considering the tensor product surface ...
  • Comparison theorems and necessary/sufficient conditions for the existence of nonoscillatory solutions of forced impulsive differential equations with delay 
    Shao Yuan Huang; Sui Sun Cheng (Український математичний журнал, 2012)
    In 1997, A. H. Nasr provided necessary and sufficient conditions for the oscillation of the equation where η > 0, p, and g are continuous functions on [0,∞) such that p(t) ≥ 0, g(t) ≤ t, g′(t) ≥ α > 0, and lim t→∞ g(t) ...
  • Conformal isoparametric spacelike hypersurfaces in conformal spaces Q⁴₁ and Q⁵₁ 
    Bianping Su; Shichang Shu (Український математичний журнал, 2012)
    We study the conformal geometry of conformal spacelike hypersurfaces in the conformal spaces Q⁴₁ and Q⁵₁. We obtain a complete classification of conformal isoparametric spacelike hypersurfaces in Q⁴₁ and Q⁵₁.
  • Cλ -semiconservative FK-spaces 
    Dağadur, I. (Український математичний журнал, 2012)
    We study Cλ -semiconservative FK-spaces for Cλ -methods defined by deleting a set of rows in the Cesáro matrix C₁ and give some characterizations.
  • Delayed feedback makes neuronal firing statistics non-Markovian 
    Vidybida, A.K.; Kravchuk, K.G. (Український математичний журнал, 2012)
    The instantaneous state of a neural network consists of both the degree of excitation of each neuron and the positions of impulses in communication lines between the neurons. In neurophysiological experiments, the times ...
  • D-Homothetic Deformation of Normal Almost Contact Metric Manifolds 
    De, U.C.; Ghosh, S. (Український математичний журнал, 2012)
    The object of the present paper is to study a transformation called the D-homothetic deformation of normal almost contact metric manifolds. In particular, it is shown that, in a (2n+1)-dimensional normal almost contact ...
  • Extension of holomorphic mappings for several moving hypersurfaces 
    Si Duc Quang (Український математичний журнал, 2012)
    We prove the big Picard theorem for holomorphic curves from a punctured disk into P ⁿ(C) with n + 2 hypersurfaces. We also prove a theorem on the extension of holomorphic mappings in several complex variables into a ...
  • FD-method for solving the nonlinear Klein–Gordon equation 
    Dragunov, D.V.; Makarov, V.L.; Sember, D.A. (Український математичний журнал, 2012)
    We propose a functional discrete method for solving the Goursat problem for the nonlinear Klein–Gordon equation. Sufficient conditions for the superexponential convergence of this method are established. The obtained ...
  • Fourier cosine and sine transforms and generalized Lipschitz classes in the uniform metric 
    Volosivets, S.S.; Golubov, B.I. (Український математичний журнал, 2012)
    For functions f ∈ L¹ (ℝ+) with cosine (sine) Fourier transforms f^c (f^s) in L¹ (ℝ), we give necessary and sufficient conditions in terms of f^c (f^s) for f to belong to generalized Lipschitz classes H^ω,m and h^ω,m ...
  • Generalized relaxed elastic line on an oriented surface 
    Özkan, G.; Yücesan, A. (Український математичний журнал, 2012)
    We study a relaxed elastic line in the general case on an oriented surface. In particular, we obtain a differential equation with three boundary conditions for a generalized relaxed elastic line. Then we analyze the results ...
  • Impulsive differential inclusions involving evolution operators in separable Banach spaces 
    Benchohra, M.; Nieto, J.J.; Ouahab, A. (Український математичний журнал, 2012)
    We present some results on the existence of mild solutions and study the topological structures of the sets of solutions for the following first-order impulsive semilinear differential inclusions with initial and boundary ...

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