
The reducibility of multifrequency systems of differential equations with summable series E. A. Grebenikov, F. K. Vaskan

403 

Optimal realization of a given process by a discontinuous exit signal of a transmission system S. T. Zavalishchin

412 

The stabilization of linear systems with stochastic properties I. Ya. Kats

420 

On the theory of Painlevé's equations N. A. Lukashevich

425 

Conditional stability on a finite interval of time S. S. Belyavsky

431 

Certain boundary value problems with conditions at infinity È. G. Khalikov

435 

Almost differentiability, with respect to parameters, of the solutions of a certain differential equation N. A. Ivanov

443 

Sufficient conditions for the absence of integral cycles for dynamical systems on manifolds V. S. Medvedev

454 

Behavior of solutions in the large of a certain automatic control system M. A. Balitinov

467 

An application of Galerkin's method to the integration of systems of nonlinear ordinary equations È. I. Kucherenko

475 

Stokes multipliers for various systems of linear differential equations. I V. R. Smilyanskii

483 

The expansion in principal functions of a nonselfadjoint differential operator of order $2n$ with spectral singularities G. M. Kesel'man, V. È. Lyantse

497 

Selfadjointness of operators that are generated by the Schrödinger equation and by inhomogeneous boundary conditions on a part of the boundary V. V. Barkovskii

513 

The representability of boundary value problems in the form of systems of sectionproblems Yu. A. Dement'ev

525 

A solution of the stationary problem of the theory of heat conductivity for wedgeshaped bodies with a boundary condition of the third kind B. A. Vasil'ev

531 

The summability of Fourier series for functions from $L_p$ in terms of eigenfunctions Sh. A. Alimov

538 

A certain method of constructing the solution of an integral equation of the first kind S. I. Mel'nik

548 

Short Communications


The relative distribution of the solutions of two stationary linear differential systems Yu. S. Bogdanov, A. F. Naumovich

552 

On the generalization of a certain theorem of N. N. Bogoljubov on averaging Hoang Van Tao

555 

Parametric functions of several matrices and of a countable set of matrices V. N. Laptinskii

558 

Theorems on the estimation of the invariant $A_1$ of the characteristic equation for an $n$th order linear homogeneous
differential equation with $\omega$periodic coefficients G. A. Los'

561 

A solution of the stability problem for a system of linear differential equations with $\pi $periodic coefficients by means of the $\pi /4$characteristic equation G. A. Los'

565 

The method of differentiation with respect to a parameter as applied to the problem of determining periodic solutions of differential equations L. N. Karmov

569 