Ordinary Differential Equations


Minimization of convex functions on convex sets by means of differential equations A. S. Antipin

1475 

On a secondorder differential system and its periodic solutions V. N. Gorbuzov

1487 

Existence of optimal controls and necessary conditions for optimality for partially observable diffusion processes N. G. Dokuchaev

1498 

Polynomial representations of higherorder central exponents N. A. Izobov

1508 

On a connection between the form of the boundary conditions and the basis property and the property of equiconvergence with a trigonometric series of expansions in root functions of a nonselfadjoint differential operator V. A. Il'in

1516 

Integral Equations


Separation of solutions of a class of nonlinear integral equations M. D. Babich

1530 

Singular integral operators in domains with corners in the plane V. B. Vasil'ev (Vasilyev)

1542 

Theory of singular solutions of singular integral equations and its application in diffraction problems I. I. Lifanov, I. K. Lifanov

1553 

On a remark of E. Goursat and its applications E. L. Perchik

1561 

On an approximate solution of the Riemann problem with a discontinuous coefficient and righthand side on an open contour A. P. Svetnoi, N. S. Yashchuk

1566 

On a system of integral equations that arises in nonstationary problems of aerodynamics A. V. Setukha

1574 

Numerical methods. Equations in finite differences


Stability of isolated stationary points of difference equations with mixed monotonicity of the righthand side. II R. Z. Abdullin

1584 

A posteriori observationestimation problems for twoparameter discrete systems with a fuzzy description of noise and perturbations A. I. Astrovskii, S. K. Korzhenevich

1594 

On the error of the collocation method for singular integral equations with conjugation V. D. Didenko

1601 

An approximate method for solving a Prandtltype integral equation for a profile with a corner I. K. Lifanov, L. N. Poltavskii

1607 

Approximate solution of singular integral equations under conditions of incomplete information A. F. Matveev

1617 

Solution of weakly singular integral equations by the subdomain method A. Pedas

1626 

On a numerical scheme for the Multhopp integral equation L. N. Poltavskii

1635 

On an approximate solution of twosided threeelement boundary value problems with a shift, and their applications N. Ya. Tikhonenko

1645 