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1977, Volume 13, Number 2  

Review articles
Construction of the equations of motion
A. S. Galiullin 		195–237

Ordinary Differential Equations
The Riemann problem. III. The case $n=2$ and $m=4$
N. P. Erugin 		238–254
Topological equivalence of hyperbolic linear systems
N. N. Ladis 		255–264
Admissible changes of time
G. N. Petrovskiĭ 		265–270
Conditions for the center for a certain equation
L. A. Cherkas 		271–275

Partial Differential Equations
Elliptic systems that are degenerate at a point
A. M. Abdrakhmanov 		276–284
A mixed problem for a certain nonlinear hyperbolic-parabolic equation
M. M. Gadzhiev 		285–289
A boundary value problem for a system of second order equations of composite type
V. D. Gatabon 		290–293
The solution of a certain boundary value problem of the theory of heat conduction with a nonclassical boundary condition
N. I. Ionkin 		294–304
The inverse problem of potential theory for hyperbolic equations
V. M. Isakov 		305–313
Theorems on the coincidence of the classical solution of the Dirichlet problem with the generalized solution of this problem from the class $W_2^1$ for second order elliptic systems of A. V. Bicadze type
N. M. Krukovskii 		314–323
Unique solvability of boundary value problems for certain operator-differential equations
V. K. Romanko 		324–335
Diffraction of a cylindrical wave by a double parabolic cylinder with apertures
L. A. Skal'ko 		336–343
Direct methods for studying the singularities of the sums of Laplace series that lie on the boundary of a ball of convergence
A. Yanushauskas 		344–357

Short Communications
An algorithm and a FORTRAN program for determining the elements of optimal synthesis for a second order system of general form that is linear in the control
M. M. Baitman, Kh. I. Kilov 		358–361
The central index for systems of linear difference equations
L. D. Zamkobaya 		362–363
An application of the analytic theory of differential equations to the determination of conditions for the single-valuedness of algebraic functions
S. G. Kondratenya, V. G. Linevich 		364–366
An analogue of the Bendixson criterion for a third order equation
G. A. Leonov 		367–368
Some problems for a certain degenerate hyperbolic system
I. V. Maiorov 		369–372
The topological structure of the set of initial values of a Ljapunov stable system
A. I. Panasyuk 		373–375
The first boundary value problem for a second order equation with small parameters multiplying the derivatives
G. I. Shishkin 		376–378
 
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