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Contents

Analytic properties of multipliers of periodic canonical differential systems of positive type

On a nonlocal integral manifold of a nonregularly perturbed differential system

On the reduction of a system of linear equations to diagonal form

A theorem on an integral inequality and some of its applications

The topology of Stokes lines for equations of the second order

On curves defined by Liénard differential equations

On the reducibility of a system of ordinary differential equations in a neighborhood of a smooth toroidal manifold

A method of reducing boundary problems for a system of differential equations of elliptic type to regular integral equations

General theory of partial differential equations and topics in the theory of boundary value problems

On a mixed problem for a hyperbolic equation in a normal cylinder

On boundary problems for equations of higher orders in infinite domains

Expansion in eigenfunctions of selfadjoint operators corresponding to general elliptic eigenvalue problems with boundary conditions

On the application of the sweeping method to the solution of nonlinear elliptic equations

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