Review articles


Development of research in the USSR in the theory of stability of motion V. V. Rumyantsev

739 

Ordinary Differential Equations


On the question of a functionaldifferential equation with an internal superposition operator A. R. Abdullaev

777 

On the theory of stability of ordinary differential systems and Pfaffian systems È. I. Grudo

782 

Impulsesliding regimes in nonlinear dynamical systems S. T. Zavalishchin, A. N. Sesekin

790 

The theory of global properties of $n$thorder ordinary linear differential equations F. Neiman

799 

Partial Differential Equations


Addition theorems and integral transformations on classes of harmonic functions V. T. Erofeenko

809 

A priori estimates for solutions of quasilinear parabolic equations in the plane and their applications V. L. Kamynin

818 

Solution of a boundary value problem with mixed boundary conditions for a parabolic system N. M. Mamedov

828 

Boundary value problems in a half space with a boundary condition at a point J. V. Rybalov

834 

Estimates for solutions of equations of elliptic type in the $L_p$ metric A. S. Fokht

845 

Numerical methods


Numerical solution of stationary problems of a viscous incompressible fluid P. N. Vabishchevich, T. N. Vabishchevich

852 

Solution of nonstationary problems of heat conduction by the variationaldifference method V. M. Goloviznin, M. A. Ryazanov

860 

The method of dynamic potentials for the numerical modeling of nonstationary problems of hydrodynamics with free boundaries V. M. Goloviznin, N. A. Koptelova, O. G. Simacheva

870 

Onestep numerical methods for solving systems of secondorder linear integrodifferential equations of Volterra type N. V. Denisenko, L. A. Yanovich

879 

Short Communications


On the question of determination of onesided delta functions in a complex domain M. Imanaliev, P. S. Pankov

893 

On the timeoptimality problem for differential inclusions L. A. Kun

897 

Exponential growth of solutions of some partial differential equations Z. G. Rudakova

899 

Regularization of a system of boundary value problems V. I. Rykov

901 

Uniqueness of the limit cycle of the equation $(yP_3(x))dy=P_1(x,y)dx$ in the presence of three singular points G. S. Rychkov

904 

New theorems on the instability of difference systems in the first approximation V. E. Slyusarchuk

906 

Stability of characteristics of diagonal systems of differential equations T. V. Usacheva

909 

Asymptotic equivalence of systems of ordinary differential equations and systems of differential equations with retarded argument Ya. Futak

911 