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 The orbital stability of bounded solutions of an autonomous system. I, IIB. P. Demidovich 575 Some remarks on the solutions of the equation $u"+a(t)f(u)=0$D. V. Izyumova, I. T. Kiguradze 589 Controllability of autonomous systemsN. N. Petrov 606 The global asymptotic stability of a certain nonlinear systemA. R. Èfendiev, M. A. Balitinov 618 Theorems on the instability of solutions of an $n$th order linear homogeneous differential equation with periodic coefficientsG. A. Los' 625 Certain questions of global stability under constantly acting perturbations in a normed linear spaceS. I. Gorshin 631 Certain tests for the existence and absence of closed trajectories of a certain system of differential equationsN. I. Avdonin 639 Degenerate systems and a small parameter at the derivativeV. P. Skripnik 646 Asymptotic properties of the solutions of linear differential equations with retarded argumentV. B. Uvarov 659 Probability estimates of solutions of a linear system of differential equations with random coefficientsN. F. Kirichenko, A. A. Martynyuk 664 Estimate of the error in the method of successive approximationsV. E. Popovich 668 On the question of the existence of random periodic conditions for linear stochasitic difference and differential systemsV. I. Grishakov, S. N. Shimanov 675 On the question of integral inequalities for a Fredholm equation whose right side is a discontinuous operatorR. K. Ragimkhanov 681 The returnability of points and regions in partially ordered dynamical systemsA. M. Stakhy 693 The construction of a sequence of coordinate functions in solving Dirichlet and Neumann problems for regions of composite formG. P. Man'ko, V. L. Rvachev, L. I. Shklyarov 702 The principle of the limit amplitudeA. G. Ramm 714 A model system of equations for the one-dimensional motion of a gasYa. I. Kanel' 721 The numerical solution of certain ill-posed problems by the method of quasisolutionsO. A. Liskovets 735 Maxwell's equations and functionally invariant solutions of the wave equationM. S. Shneerson 743