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1976, Volume 12, Number 7  

Ordinary Differential Equations
Periodic solutions of certain second order equations
V. V. Amel'kin, V. È. Zhavnerchik 		1147–1150
The domain of definition of a Sturm–Liouville operator
K. Kh. Boimatov 		1151–1160
The singular solutions of nonlinear differential equations. II
Ya. V. Bykov, N. I. Fomina 		1161–1173
Asymptotic solutions of certain linear inhomogeneous second order differential equations in a Banach space with a small parameter multiplying the highest derivative
L. A. Groza 		1174–1186
The oscillation and the disconjugacy of the solutions of nonlinear differential systems
D. V. Izyumova, J. D. Mirzov 		1187–1193
On the question of the representation of the solutions of linear functional-differential equations
G. G. Islamov 		1194–1203
Relatively ideally observable systems
A. P. Marynych 		1204–1210
Necessary optimality conditions for certain classes of discrete control systems
L. I. Minchenko 		1211–1218
Construction of the equations of a system of programmed motions in a sliding state
R. G. Mukharlyamov 		1219–1222
Monotone differential equations. II
A. I. Perov, Yu. V. Trubnikov 		1223–1237
The problem of distinguishing the center and a focus for systems with nonzero linear part
A. P. Sadovskii 		1238–1246
Comparison of equivalences of dynamical systems on the plane
O. M. Yudrups 		1247–1255

Partial Differential Equations
The spectral function of certain singular differential operators. I
V. V. Katrakhov 		1256–1266
The first boundary value problem for degenerate elliptic equations in a half-space
I. I. Matveeva 		1267–1281
Construction of a potential with quasiregular kernel in closed form
M. L. Rasulov 		1282–1289
Solution of one-dimensional mixed problems for a certain parabolic system in a domain with variable boundary
T. M. Rasulov 		1290–1296

Short Communications
On the averaging method in Hilbert space for integrodifferential equations
R. Anvarov 		1297–1300
A remark on the number of Ljapunov constants for conditions for a center of a certain differential equation
G. M. Buldyk 		1301–1302
Algebraic and algebraic-logarithmic moving singularities of systems of second order differential equations
E. I. Danilova 		1303–1305
The behavior of the trajectories of a certain dynamical system in the Poincaré disc
I. G. Kozhukh 		1306–1309
Reduction of a controllability problem to a boundary value problem
V. I. Korobov 		1310–1312
The stabilization of nonlinear control systems
A. M. Meilakhs 		1313–1315
A method of reducing a special boundary value problem to a Cauchy problem
P. I. Monastyrnyi, A. I. Azarov 		1316–1319
Regularity classes for second order vectorial equations
T. I. Smagina 		1320–1322
The optimality of regularizing algorithms in the solution of ill-posed problems
V. P. Tanana, A. R. Danilin 		1323–1326

People of Soviet science
Nikolaǐ Evgrafovič Kočin (on the occasion of the 75th anniversary of his birth)
N. P. Erugin 		1327–1331
Medžid Ljatifovič Rasulov (on the occasion of his sixtieth birthday)
N. P. Erugin, M. G. Gasymov, Ya. D. Mamedov, Yu. A. Mamedov 		1332–1337
 
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