Vol. 57 No. 3 (2005)

Published: 25.03.2005

Research articles

On Jackson-Type Inequalities for Functions Defined on a Sphere

V. F. Babenko, V. G. Doronin, A. A. Ligun, A. A. Shumeiko

291–304
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- Springer
Polynomial Form of de Branges Conditions for the Denseness of Algebraic Polynomials in the Space $C_w^0$

A. G. Bakan

305–319
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- Springer
Generalizations of Fox Homotopy Groups, Whitehead Products, and Gottlieb Groups

M. Golasinski, D. Goncalves, P. Wong

320–328
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- Springer
Asymptotic Equivalence of Triangular Differential Equations in Hilbert Spaces

Dinh Chau Dang, Tuan Vu

329–337
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- Springer
Asymptotic Behavior of Unbounded Solutions of Essentially Nonlinear Second-Order Differential Equations. I

V. M. Evtukhov, V. A. Kas'yanova

338–355
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- Springer
On Some Solvable Classes of Nonlinear Nonisospectral Difference Equations

A. A. Mokhonko

356–365
- PDF (Ukrainian)
- Springer
Solvability and Trajectory-Final Controllability of Pseudohyperbolic Systems

D. A. Nomirovs'kii

366–376
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- Springer
Boundary-Value Problem for Linear Parabolic Equations with Degeneracies

I. D. Pukalskyi

377–387
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- Springer
On the Decomposition of a Diagonal Operator into a Linear Combination of Idempotents or Projectors

V. I. Rabanovych

388–393
- PDF (Ukrainian)
- Springer
Approximation of Continuous Functions of Low Smoothness by de la Vallee-Poussin Operators

V. I. Rukasov, E. S. Silin

394–399
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- Springer
Weighted Moduli of Smoothness and Sign-Preserving Approximation

I. V. Smazhenko

400–420
- PDF (Ukrainian)
- Springer

Short communications

On Isometric Immersion of Three-Dimensional Geometries $SL_2$, $Nil$ and $Sol$ into a Four-Dimensional Space of Constant Curvature

L. A. Masal'tsev

421–426
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- Springer
On the Equivalence of Some Conditions for Convex Functions

S. Yu. Tikhonov

427–431
- PDF (Russian)
- Springer