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1980, Volume 16, Number 3  


Ordinary Differential Equations
Existence of nonnegative solutions of linear differential equations
G. G. Islamov, I. Ya. Shneiberg
387–394
$\sigma $-controllability of linear autonomous systems in the presence of constraints on the control
V. I. Korobov, Nguyen Khoa Shon
395–404
Operator-differential equations in spaces of ultradistributions
A. N. Kochubei
405–413
Some properties of the Bellman function for linear and symmetric polysystems
A. A. Liverovskiy
414–423
Convergence of solutions in nonautonomous differential systems
I. A. Malysheva, A. A. Shestakov
424–432
Uniqueness of the limit cycle of the equation $(y-P_3(x))dy=P_1(x,y)dx$
G. S. Rychkov
433–437
Sharp upper bounds of mobility of the Ljapunov exponents of a system of differential equations and the behavior of the exponents under perturbations approaching
I. N. Sergeev
438–448
Zones of instability of a one-dimensional periodic Dirac system
S. G. Simonyan, L. A. Bagdasaryan
449–453
Degenerate systems and a small parameter multiplying the derivative
V. P. Skripnik
454–461
Absolute exponential stability of linear differential equations of neutral type in a Banach space
V. E. Slyusarchuk
462–469
Integral tests for oscillation of the solutions of higher-order linear differential equations. I
T. A. Chanturiya
470–482

Partial Differential Equations
An approach to control of the level of residual stresses
Yu. I. Nyashin, P. V. Trusov
483–491
Generation of a singularity in the solution of a Stefan-type problem
V. V. Pukhnachov
492–500
Closure in $L_2$ of the set of solutions of a family of nonlinear elliptic equations
U. Raitums
501–506
Fredholm property of a class of boundary value problems
È. M. Saak
507–515
The Cauchy problem for involutive systems of partial differential equations
S. N. Samborskii
516–521
Fundamental solution of a differential operator with a singularity
V. S. Serov
522–531
The mixed problem for the wave equation
S. I. Temirbulatov
532–536
Existence of generalized and stationary statistical solutions for a system of equations of an electron fluid in a bounded domain
A. P. Kharchenko
537–544

Short Communications
Behavior of the solutions of the Cauchy problem for a hyperbolic equation
A. B. Aliev
545–547
A computer experiment in calculation of light trajectories
V. G. Boltyanskii, L. K. Nikolaev
548–550
Two typical properties of nonautonomous differential equations
I. U. Bronshtein, V. P. Burdaev
551–555
On the Cauchy problem for degenerate hyperbolic equations
N. P. Kulikov
556–557
A property of an integral vortex
L. N. Lyapin
558–559
Asymptotics of the energy emitted into space by an almost periodic source of electromagnetic waves
F. V. Srumova
560–563

People of Soviet science
Aleksandr Andreevič Šestakov (on the occasion of his 60th birthday)
N. P. Erugin, A. A. Samarskii
564–570
 
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