Edited by R. V. Gamkrelidze V. A . Steklov Institute of Mathematics, USSR Academy of Sciences Moscow.

• Preface, Zum Alexanderschen Dualitätssatz, Zum Alexanderschen Dualitätssatz Zweite Mitteilung, Sur une Hypothèse Fondamentale de la Théorie de la Dimension, Über den Algebraischen Inhalt Topologischer Dualitätssätze, Beweis des Mengerschen Einbettungssatzes, Über Stetige Algebraiche Körper, On Dynamical Systems Close to Hamiltonian Systems, The Theory of Topological Commutative Groups, The General Topological Theorem of Duality for Closed Sets, Sur les Groupes Topologiques Compacts et le Cinquième Problème de M. Hilbert, Sur les Nombres de Betti des Groupes de Lie, Rough Systems, The Classification of Continuous Mappings of a Complex into a Sphere. Communication I, The Classification of Continuous Mappings of a Complex into a Sphere. Communication II, Homologies in Compact Lie Groups, Über die Topologische Struktur der Lieschen Gruppen, A Classification of Mappings of the Three-Dimensional Complex into the Two-Dimensional Sphere, On the Zeros of Certain Elementary Transcendental Functions, Mappings of a Three-Dimensional Sphere into an «-Dimensional Complex, Characteristic Cycles of Manifolds, A Method of Calculation of Homology Groups, Hermitian Operators in a Space With an Indefinite Metric, The Classification of Certain Skew Products, Characteristic Cycles, Topological Duality Theorems, Characteristic Cycles of Differentiable Manifold, On Certain Topological Invariants of Closed Riemannian Manifolds, Homotopic Classification of the Mappings of an (n + 2)-Dimensional Sphere into an «-Dimensional Sphere, On the Zeros of Certain Elementary Transcendental Functions (Supplement), The Asymptotic Behaviour of the Solutions of Systems of Differential Equations With a Small Parameter Attached to Higher Derivatives, Optimal Control Processes, Linear Differential Games, Linear Differential Evasion Games, Linear Differential Pursuit Games