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 Ordinary Differential Equations Generalized regular systemsB. F. Bylov 575 Conditions for the applicability of Čaplygin's theorem to a certain multipoint linear difference boundary value problem of order $n$G. V. Gusel'nikova 592 Asymptotic series for the eigenvalues and eigenfunctions of second order self-adjoint operatorsG. V. Zhdanova 603 The asymptotic stability of sets in dispersive dynamical systemsM. S. Izman 615 A second order dynamical system with a given particular integralL. S. Lavrinovich 622 Ideally observable systemsM. S. Nikol'skii 631 Periodic solutions of systems of linear equations of general form with deviating argumentV. R. Nosov 639 The behavior of the solutions of a sequence of second order periodic systems with a small nonlinearityV. A. Pliss 651 Partial Differential Equations The third exterior boundary value problem for a second order elliptic equation. II. A. Danilova 661 Conditions for the convergence of spectral decompositions that correspond to self-adjoint extensions of elliptic operators. I. Self-adjoint extension of the Laplace operator with a point spectrumV. A. Il'in, Sh. A. Alimov 670 On the Gevrey theory for parabolic potentials. I, IIL. I. Kamynin 711 Closure in the metric of the generalized Dirichlet integralS. A. Laptev 727 Expansion in eigenfunctions of a nonselfadjoint differential operator of an exterior boundary value problemA. G. Ramm 737 Short Communications The order of the convergence of the method of least squares for the Dirichlet problemL. A. Boziev 743 The behavior of the solution of systems of two differential equations in the neighborhood of an essential singularityS. G. Kondratenya 747 The problem of the conjugacy of certain nonstationary differential equations of order $2m$V. I. Korzyuk 750 Coefficient stability of the solutions of second order ordinary differential equations and of parabolic equations on the planeP. K. Senatorov 754 A certain one-dimensional scattering problem in the quasi-classical approximationS. G. Simonyan 759