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1973, Volume 9, Number 9  

Ordinary Differential Equations
Sufficient conditions for the oscillatoriness of the solutions of nonlinear differential equations with deviating argument
Ya. V. Bykov, L. Ya. Bykova, E. I. Shevtsov 		1555–1560
Certain questions of whether a linear optimal control problem with minimal pulse is well-posed. II. Dependence of the optimal trajectory on the initial state, on the perturbations and on the parameters
T. Gichev 		1561–1571
Movable singular points of a completely integrable first order total differential equation
È. I. Grudo 		1572–1582
Existence, uniqueness and convergence of successive approximations for differential equations of neutral type with lag
M. E. Drakhlin, T. K. Plyshevskaya 		1583–1592
A general class of systems of two differential equations that have no solutions with movable essential singularities
S. G. Kondratenya 		1593–1600
Nonselfadjoint abstract differential operators with discrete spectrum
A. N. Kochubei 		1601–1608
The averaging of the trajectories of slow dynamical systems
S. M. Meerkov 		1609–1617
The boundary of the set of controllability of plane holomorphic systems
N. N. Petrov 		1618–1626
Representation of the solutions of linear differential-difference equations of neutral type
V. M. Polischuk, A. N. Sharkovskii 		1627–1645

Partial Differential Equations
Estimates of the fundamental potentials for parabolic equations of higher order. II
E. A. Baderko 		1646–1653
Asymptotic behavior of the solution of the equation $\mu^2\Delta u-k^2(x,y)u=f(x,y)$ in a rectangular domain
V. F. Butuzov 		1654–1660
A certain method for the solution of partial differential equations
V. M. Darevskii 		1661–1672
A uniqueness theorem for a certain inverse problem for a system of hyperbolic equations of order $n$
S. Elubaev 		1673–1682
Diffraction of electromagnetic waves in a cylinder by a sphere
V. T. Erofeenko 		1683–1692
Solution of a certain boundary value problem of the theory of the diffraction of waves for a region that is bounded by a plane and by the surface of an elliptic cylinder
E. A. Ivanov, V. V. Makarova 		1693–1699
The smoothness of the eigenfunctions of a compressed plate near the corners
È. A. Pais 		1700–1706
Normal solvability in the sense of Hausdorff of a certain nonlinear problem
V. R. Portnov 		1707–1717

Short Communications
Certain necessary conditions for the stability in the large of the zero solution of a certain system of $n$ nonlinear differential equations that satisfy generalized Routh–Hurwitz conditions
L. I. Burganskaya 		1718–1720
Necessary conditions for the optimality of multidimensional singular controls
S. Ya. Gorokhovik 		1721–1724
The Goursat problem over Gevrey spaces
K. I. Kol'tsova 		1725–1727
The optimal control of a system with free initial and final states in Hilbert space
M. M. Kopets 		1728–1729
Certain boundary value problems and their approximate solutions
V. S. Mokeichev 		1730–1733
A study of the set of periodic solutions of a certain system of second order differential equations without dissipation
G. L. Yuzbashev 		1734–1737
 
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