Vol 49 No 6 (1997) | Ukrains’kyi Matematychnyi Zhurnal

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Published: 25.06.1997

Research articles

Approximation of classes of convolutions by linear methods of summation of Fourier series

D. M. Bushev

739–753
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On the best approximations and rate of convergence of decompositions in the root vectors of an operator

G. V. Radzievskii

754–773
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Construction of approximations for a stationary solution of a system of singular ordinary differential equations

I. M. Romanyshyn, L. A. Synyts’kyi

774–778
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Spectral problems for canonical systems of finite-difference equations on an axis

L. A. Sakhnovich

779–788
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Structure of locally graded nonnilpotent CDN[]-groups

N. N. Semko

789–798
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The existence of a bifurcation value of a parameter of a system of differential equations with deviating argument

L. V. Nasykhova, M. T. Terekhin

799–805
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Conditional symmetry of the Navier-Stokes equations

N. I. Serov, L. O. Tulupova, V. I. Fushchich

806–813
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Application of one constructive method for the construction of non-Lie solutions of nonlinear evolution equations

R. M. Cherniga

814–827
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Short communications

On the optimal renewal of bilinear functionals in linear Normed spaces

V. F. Babenko, A. A. Rudenko

828–831
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Boundary-value problems for systems of difference equations

О. A. Boichuk

832–835
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Conditions of nonoscillation of binomial systems of differential equations

M. K. Bugir

836–841
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On ascending and subnormal subgroups of infinite factorized groups

Glovanni F. De, Ya. P. Sysak, S. Franclosi

842–848
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Construction of nonnilpotent biprimary dispersible groups with metacyclic subgroups of nonprimary index

L. I. Zuzuk

849–851
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Congruences and quasiidentities on unars

G. Ch. Kurinnyi

852–856
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Stable difference scheme for a nonlinear Klein-Gordon equation

L. P. Nizhnik

857–859
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A criterion of diagonalizability of a pair of matrices over the ring of principal ideals by common row and separate column transformations

V. M. Petrichkovich

860–862
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On the existence and uniqueness of a solution of a linear stochastic differential equation with respect to a logarithmic process

A. Yu. Pilipenko

863–871
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On the application of Ateb-functions to the construction of a solution of a nonlinear Klein-Gordon equation

B. I. Sokil

872–877
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A remark on quasianalytic vectors for a pair of anticommuting operators

S. V. Tishchenko

878–880
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