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Review articles
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Functional-differential equations
N. V. Azbelev, L. F. Rakhmatullina
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771 |
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Ordinary Differential Equations
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Strictly positive periodic solutions of a nonlinear ordinary differential equation
B. M. Arkhipov, A. Ya. Khokhryakov
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798 |
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Classification of polynomial systems with respect to birational transformations. I
L. A. Beklemisheva
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807 |
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The existence of limit cycles of the equation $(1+x)yy'=-P_4(x)-P_2(x)y+\delta y^2$ in a singular case
G. M. Buldyk
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817 |
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The growth of meromorphic solutions of second order differential equations
A. A. Gol'dberg
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824 |
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Simple cycles in relay-sampled data systems
V. A. Gustomesov
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830 |
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Concomitants of a system with quadratic nonlinearities
Bularas Driss, M. N. Popa
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835 |
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The boundedness of the solutions of a certain multidimensional system in the critical case of one zero root and two pure imaginary roots. II
N. N. Kushkov
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843 |
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The behavior of the solutions in the case where the transformation of the argument depends on the solution
V. P. Skripnik
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853 |
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Boundary value problems for differential equations with operator coefficients that depend on a parameter. II. Solvability and properties of solutions
N. J. Yurchuk
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859 |
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Partial Differential Equations
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The uniqueness of the expansions in eigenfunctions of the Schrödinger operator
P. I. Achilov
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871 |
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Unboundedness of the solutions and a comparison theorem of Sturm type for higher order parabolic systems on the plane
L. M. Kuks
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878 |
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Fundamental solutions of parabolic systems with discontinuous coefficients, and their applications to boundary value problems. IV
M. I. Matiichuk
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885 |
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An approach to the solution of ill-posed problems
P. E. Sobolevskii, È. A. Shteynvil
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900 |
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Short Communications
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Periodic solutions of linear completely integrable systems
L. N. Gaishun
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905 |
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High order optimality conditions in a class of problems with constraints on the ends of the trajectories
S. Ya. Gorokhovik
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908 |
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On solutions of a singular Cauchy problem
A. E. Zernov
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912 |
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Formulas for the mutual expansion of cylindrical and spheroidal wave functions
V. T. Erofeenko
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915 |
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The dependence on the parameter of the structure of the solutions on a toroidal invariant surface
E. K. Ershov
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919 |
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Polynomial solutions of algebraic differential equations
P. Lazov, D. Dimitrovski
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922 |
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Asymptotic behavior of the solutions of linear difference equations with constant coefficients
D. O. Melkumyan
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926 |
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Necessary and sufficient conditions for the solvability of a multipoint boundary value problem for a system of first order ordinary differential equations
V. D. Ponomarev
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929 |
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Eigenvalues of certain integral operators
A. G. Ramm
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932 |
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Isolated periodic solutions of certain differential equations
A. E. Rudenok
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935 |
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A criterion for the harmonicity of polynomials
S. G. Samko
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938 |
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Some properties of the solutions of linear differential equations with asymptotically almost periodic coefficients
D. N. Cheban
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940 |
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On the problem of the homotopy classification of elliptic systems with eight variables
V. N. Chernomaz
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943 |
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People of Soviet science
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Vladimir Aleksandrovič Il'in (on the occasion of his fiftieth birthday)
A. V. Bitsadze, V. S. Vladimirov, N. P. Erugin, S. M. Nikol'skii, A. A. Samarskii, A. N. Tikhonov
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947 |
