
Asymptotic series in the theory of nonlinear systems of ordinary differential equations. I A. V. Kostin

875 

A priori estimate of solutions of boundary value problems for second order ordinary nonlinear differential equations S. A. Pak

890 

Differential equations $yy'=Q_4(x,y)$, having an ellipse as limit cycle M. V. Dolov

898 

On the question of nonuniqueness of solutions of systems of singular integral equations of Volterra type Yu. S. Shatalov

905 

The group of symmetric transformations of a generalized Gyldén problem A. M. Slesarev

912 

The existence of bounded and periodic solutions of integrodifferential equations with retarded argument G. F. Yakovleva

919 

The asymptotic behavior of solutions of certain nonlinear differential equations I. A. Toroshelidze

926 

A formula for the expansion of an arbitrary matrixfunction in terms of the solution of a spectral problem N. A. Aliev, M. L. Rasulov

941 

Smoothness of thermal potentials. IV. Application of the theory of thermal potentials to the solution of a problem of biophysics on the distribution of concentrations in a living cell L. I. Kamynin

948 

A problem on a pairing of equations of parabolic and hyperbolic types when time derivatives occur in the boundary conditions E. A. Ostrovskii

965 

The second boundary value problem for the differential equation of elastic equilibrium of a slanting cylindrical shell S. M. Belonosov, M. A. Ismailov

980 

Solution of a completely hyperbolic equation with initial data given on a line of degeneracy S. P. Khairullina

994 

Solution by the method of lines of certain boundary value problems for equations of elliptic type V. T. Ivanov

1002 

Conditions of validity of Čaplygin's theorem for elliptic difference equations A. L. Teptin

1009 

Short Communications


Integrability conditions of certain second order nonlinear differential equations S. Ya. Braude

1022 

Linear boundary value problems with small lag V. R. Nosov

1025 

The structure of a solution of the equation $u'=U_0(\nu)u+\sum_{n=1}^\infty(\nu)u^{1+\alpha_n}\equiv U(u,\nu)$ in a small
neighborhood of the origin A. N. Erugin

1029 

People of Soviet science


Vladimir Ivanovic Smirnov (zum 80. Geburtstag) S. M. Lozinskii, V. A. Pliss

1031 