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1983, Volume 19, Number 8  

Ordinary Differential Equations
Behavior at infinity of optimal trajectories of an object
V. G. Boltyanskii 		1291–1299
Investigation of the stability of solutions of certain nonlinear multidimensional differential systems
L. I. Burganskaya 		1300–1310
Estimation of the growth of solutions of a piecewise constant system
B. F. Bylov, È. A. Tikhonova 		1310–1316
The spectrum and spectral singularities of differential operators with periodic complex-valued coefficients
O. A. Veliev 		1316–1324
Problems of optimization with controls in the coefficients of a parabolic equation
A. D. Iskenderov, R. K. Tagiyev 		1324–1334
On the question of the construction of periodic solutions of nonautonomous differential equations
V. N. Laptinskii 		1335–1343
Typical properties of conditional exponential stability. I
V. M. Millionshchikov 		1344–1356
Invariant and stable families of sets with respect to differential inclusions
T. Nguyễn 		1357–1366
The “Cossack-robber” differential game
N. N. Petrov, N. Nikandrovich Petrov 		1366–1374
Stability under constantly acting perturbations
N. V. Puhareva 		1374–1378
Sharp estimates for eigenfunctions of an arbitrary nonselfadjoint Schrödinger operator
V. V. Tikhomirov 		1378–1385
Global phase portrait of a two-dimensional system of a special type
Sh. R. Sharipov, A. M. Matvienko 		1385–1389

Partial Differential Equations
Divergence of expansions in eigenfunctions
A. I. Bastis 		1390–1400
An analogue of the Phragmén–Lindelöf theorem
M. D. Bronshtein 		1400–1406
On the Landau equation
O. E. Buryak 		1406–1416
Addition theorems connected with toroidal, cylindrical and spherical harmonic functions
V. T. Erofeenko 		1416–1427
Boundary value problems for operator-differential equations of mixed type
N. V. Kislov 		1427–1436
On the problem of determining the right-hand side of a hyperbolic system
D. G. Orlovskii 		1437–1445

Short Communications
Linear systems with a triangular reflecting function
L. A. Al'sevich 		1446–1449
Stability of solutions of some classes of linear differential equations with oscillating coefficients
V. Sh. Burd 		1450–1452
Determination of the domain of exponential stability of systems of differential equations
M. I. Gil' 		1452–1454
Refinement of bounds for highest exponents in the freezing method
N. A. Izobov 		1454–1456
A counterexample in the theory of difference operators
A. G. Kamenskii 		1457–1458
An approximate solution of the Stefan problem on an interval
S. A. Labutin 		1458–1462
Conditions for the absence of circular motions in $n$-connected Froude pendulums of different masses
V. S. Serebryakova 		1462–1466
 
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