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1984, Volume 20, Number 2  

Ordinary Differential Equations
Investigation of the problem of the center and focus in one case
A. F. Andreev, P. D. Khody-Zade 		187–197
The highest $\sigma $-exponent of linear differential equations
E. A. Barabanov 		197–207
Oscillatory properties of solutions of a nonlinear system of second-order ordinary differential equations
A. I. Bulgakov, B. A. Sergeev 		207–214
The spectrum of a nonselfadjoint singular differential operator
A. P. Vinnichenko 		215–219
Coefficient stability of systems of ordinary differential equations
A. A. Zlotnik 		220–229
Qualitative investigation of a system in the space $\mathbf R^3$
A. Ya. Kapitanov 		229–233
Lyapunov's function and dichotomy on semiaxes of linear systems of differential equations
A. N. Kulik, V. L. Kulik 		233–241
Typical properties of conditional exponential stability. IV
V. M. Millionshchikov 		241–257
A boundary value problem for linear differential-difference equations
S. A. Minyuk, S. N. Lyakhovets 		257–263
Boundary value problems for differential equations, which contain a parameter, with multiple roots of the characteristic equation
A. S. Pechentsov 		263–273
Some integrable equations with a small parameter that are close to Liénard's equation
G. E. Popov 		274–278

Partial Differential Equations
Nonessential sets of the Dirichlet problem
N. V. Bagotskaya 		279–288
Global solution of a first-order partial differential equation. II
Y. A. Belov 		288–302
Characteristic problem for the massive wave equation
A. A. Borgardt, D. Ya. Karpenko 		302–308
Linear equations in spaces of generalized periodic functions
A. A. Kuleshov 		308–315
The Neumann problem for the Helmholtz operator in the exterior of a thin body of revolution
G. F. Maslennikova 		316–324
Uniqueness of the determination of dielectric and magnetic permeabilities in an anisotropic one-dimensionally inhomogeneous medium
V. G. Romanov 		325–332
A problem of Tricomi type for equations of mixed type with strong characteristic degeneration
K. B. Sabitov 		333–337
Weighted imbedding theorems and their application to estimates of solutions of equations of elliptic type
A. S. Fokht 		337–343

Short Communications
Attraction of solutions of an ordinary differential system
A. I. Bagrova 		344–347
Asymptotic behavior of the solutions of higher-order ordinary differential equations with a turning point
A. B. Davydov, N. M. Matveev 		347–349
Some properties of solutions of a class of systems of nonlinear differential equations
V. P. Zhukov 		349–351
Asymptotic integration of hyperbolic equations with weakly nonlinear perturbation
L. A. Kalyakin 		351–353
Systems of three differential equations whose solutions do not have essentially singular points
S. G. Kondratenya 		353–354

Chronicle
О семинаре по качественной теории дифференциальных уравнений в Московском университете
 355–362
 
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