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1973, Volume 9, Number 7  

Ordinary Differential Equations
The contraction spectrum of the generating operator of an $\varepsilon $ controlled linear dynamical system
V. A. Baidosov 		1171–1176
Periodic oscillations with large amplitude. II
Ya. V. Bykov, K. A. Kiriy 		1177–1186
The solvability of boundary value problems in the small
N. I. Vasilyev, Yu. A. Klokov 		1187–1194
Investigation of a discrete relay system by the method of point transformations of the switching domains. I
V. A. Gustomesov 		1195–1206
On the question of the positivity of a Cauchy function
Yu. I. Zubko, V. A. Tyshkevich 		1207–1213
Systems of two differential equations having no solutions with movable essential singular points
S. G. Kondratenya 		1214–1221
Topological equivalence of linear flows
N. N. Ladis 		1222–1235
Certain properties of entire solutions of nonlinear differential equations
L. G. Oreschenko 		1236–1243
The properties of the Bellman function
T. Yu. Petrenko 		1244–1255
The phase diagrams of three-dimensional systems of differential equations of Morse–Smale type
S. Yu. Pilyugin 		1256–1261
Uniform stability under parametric perturbations
E. S. Pyatnitskii 		1262–1274
Certain methods of investigating equations with deviating argument
A. G. Terent'ev, T. Ya. Shishova 		1275–1280
Algebraic limit cycles
V. F. Filiptsov 		1281–1288
Behavior of the solutions of quasihomogeneous systems having only simple exceptional sets
Yu. V. Churin 		1289–1297

Partial Differential Equations
Differential equations for the Feynman integral of the self-energy diagram
V. A. Golubeva 		1298–1309
Connection between the fundamental solutions in cylindrical and spherical coordinates (with the same origin) for certain equations of mathematical physics
V. T. Erofeenko 		1310–1317
The solvability of generalized boundary value problems for second order elliptic equations
T. V. Lossievskaya 		1318–1325
The Goursat and the Darboux problem for a certain class of hyperbolic systems
M. Meredov 		1326–1333
On the question of the abstract Cauchy problem
S. M. Ponomarev 		1334–1338
The Cauchy problem for a certain nonstationary equation
I. V. Suveyka 		1339–1346

Short Communications
The relative position of the integral tubes of two linear differential systems
O. A. Kastritsa, G. N. Petrovskiĭ 		1347–1348
Forms of movable singularities of a certain differential system
A. M. Markina 		1349–1350
On the theory of the third order homogeneous equation of degree two
L. P. Sulima 		1351
The asymptotic stability of a second order linear system that depends on parameters
L. V. Trigubovich 		1352–1354
 
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