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1968, Volume 4, Number 6  


The maximum principle for L. S. Pontrjagin's extremals
R. Gabasov, F. M. Kirillova
963
Asymptotic stability of the zero solution of a non-autonomous system of two differential equations. II
G. S. Krechetov
973
Mobile singularities of systems of two differential equations
S. G. Kondratenya, A. I. Yablonskii
983
Mobile singular points of solutions of certain ordinary differential equations
S. G. Kondratenya
991
The optimality of singular controls
R. Gabasov
1000
The stability of singular cycles
L. A. Cherkas
1012
Stability in critical cases
A. P. Sadovskii
1018
Ljapunov functions and the continuation of solutions of differential equations
A. A. Jushchenko
1022
The behavior of the integral curves of a certain system of two differential equations
V. V. Amel'kin
1035
A certain equation of nonlinear vibrations
O. A. Kononova
1043
The Green's matrix of a periodic boundary value problem for a system of two second order linear differential equations
B. M. Arkhipov
1055
Lagrange's differential equation
M. V. Zaretskii
1065
The expansion of solutions of multidimensional Volterra integral equations in the neighborhood of singular points
È. I. Grudo
1071
Certain new boundary value problems for a certain kind of partial differential equations. I
N. I. Brisch, N. J. Yurchuk
1081
An application of the method of the contour integral to the solution of a certain problem on transverse vibrations of a composite visco-elastic rod
S. I. Gaiduk
1102
The index and the normal solvability of integro-differential operators
Yu. K. Lando
1112
Задача о поле линейного источника в присутствии “криволинейной” решетки из конечного числа параллельных проводов
E. A. Ivanov
1127
The regularization of linear equations in Banach spaces
O. A. Liskovets
1136
The application of the method of orthogonal transformations to boundary value problems with unseparated conditions for systems of differential equations
P. I. Monastyrnyi
1140

Short Communications
The set of lower exponents of positive measure
N. A. Izobov
1147
A certain class of dynamical systems with two closed algebraic trajectories
P. S. Belevets
1150
A certain class of differential systems with elementary solutions
V. I. Mironenko
1154
The absence of bilateral attraction points
N. N. Ladis
1157
The forcing of sliding conditions in the method of differential descent
S. M. Gerashchenko
1158
 
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