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JOURNALS // Differentsial'nye Uravneniya // Archive

1978, Volume 14, Number 3


Ordinary Differential Equations
Uniform approximations to the solutions of certain singularly perturbed nonlinear equations
Yu. P. Boglaev, A. V. Zhdanov, V. G. Stel'makh
395
A necessary condition for the system of eigen- and associated functions of an ordinary differential operator to be a basis in $L_2(0,1)$
S. K. Voronina
407
Correctness of an optimal control problem with a variable right end and an integral quadratic efficiency criterion
T. R. Gichev
418
The complex centers and foci of a second order differential equation
È. I. Grudo
425
The spectrum of a degenerate boundary value problem
A. M. Zverkin
435
Stability in the large of the zero solution of a second order autonomous system
I. G. Egorov
442
Controllability of general differential systems
T. S. Kalyuzhnaya
451
A problem on the construction of comparison functions in the theory of the stability of motion
R. O. Ramirez Inostroza
460
Almost reducible systems with quasiperiodic coefficients
N. S. Fal'ko
467

Partial Differential Equations
Normal solvability of the generalized Dirichlet problem for a certain class of nonelliptic equations
B. G. Ararktsyan, G. G. Kazaryan
474
A second order degenerate elliptic equation in Hilbert space
L. I. Vainerman
482
An application of the contour integral method to the solution of the Cauchy problem for certain higher order parabolic systems with variable coefficients
N. M. Mamedov
492
The absolute convergence of Fourier series in generalized Nikol'skiǐ classes
V. S. Serov
499
A problem with a contact discontinuity for a system of three quasilinear equations
A. D. Sidorenko
504

Integral Equations and Integral-Differential
A nonlinear integro-differential system of transport equations
V. V. Kulinich, S. F. Morozov
512
On the approximate solution of certain singular integral equations with shift
N. Ya. Tikhonenko
522
The construction of an asymptotic solution of a system of linear integro-differential equations of rational rank
N. I. Shkil', A. N. Voronoi
527

Short Communications
Reducible completely integrable systems
V. V. Amel'kin, I. V. Gaishun, L. N. Gaishun
540
On the question of the stability of the solutions of second order systems in critical cases
N. G. Bulgakov
543
The semiperiodic Dirichlet problem for a class of equations of mixed type
T. Sh. Kal'menov
546
The solvability of boundary value problems on small intervals
A. Ya. Lepin
548
A third order linear differential equation
R. R. Mkrtumyan
551
Correctness of a boundary problem for differential-operator equations in a Banach space
V. P. Rudakov
554
Regularization of linear differential equations with constant operators in the degenerate case
N. A. Sidorov
556
Generalized solvability of a certain boundary value problem for the wave equation
N. G. Sorokina
561

People of Soviet science
Konstantin Sergeevič Sibirskiǐ (on the occasion of his fiftieth birthday)
V. A. Andrunakievich, N. P. Erugin, Yu. S. Bogdanov
565


© Steklov Math. Inst. of RAS, 2025