Vol 50 No 8 (1998) | Ukrains’kyi Matematychnyi Zhurnal

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Published: 25.08.1998

Anniversaries

Jubilees Iosyp Zakharovych Shtokalo (on the 100th anniversary of his birth)

1152–1153
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Research articles

Comparison of approximation properties of generalized polynomials and splines

V. F. Babenko, V. A. Kofanov, S. A. Pichugov

1011–1020
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Criterion of the solvability of matrix equations of the Lyapunov type

О. A. Boichuk, S. A. Krivosheya

1021–1026
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Isometry of functional spaces with different number of variables

D. M. Bushev

1027–1045
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Generalized horseshoes and indecomposability for one-dimensional continua

X. Ye

1046–1054
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$q$-Numbers of quantum groups, Fibonacci numbers, and orthogonal polynomials

I. I. Kachurik

1055-1063
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Spectral theory of some matrix differential operators of mixed order

A. Yu. Konstantinov

1064–1072
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Criteria of the mean-square asymptotic stability of solutions of systems of linear stochastic difference equations with continuous time and delay

D. G. Korenevsky

1073–1081
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On finite convolutions of singular distributions and a “singular analog” of the Jessen-Wintner theorem

M. V. Pratsiovytyi

1082–1088
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Trigonometric widths of the classes $B_{p,θ}^ r$ of functions of many variables in the space $L_q$

A. S. Romanyuk

1089-1097
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Minimum-Area ellipse containing a finite set of points. II

Yu. I. Petunin, В. V. Rublev

1098–1105
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On new exact solutions of a nonlinear diffusion system that describes the growth of protein crystals

R. M. Cherniga

1106–1120
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On one class of solutions of a countable quasilinear system of differential equations with slowly varying parameters

S. A. Shchegolev

1121–1128
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On the renewal of a solution of the Dirichlet boundary-value problem for a biharmonic equation

M. Sh. Shabozov

1147–1151
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Short communications

Estimates of the heat kernel on a manifold of nonpositive curvature

V. G. Bondarenko

1129–1136
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Investigation of a system of linear differential equations with random coefficients

I. A. Dzhalladova

1137–1143
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On topological spaces with π₂ = 0

S. I. Maksimenko

1144–1146
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