Includes bibliographical references.

On extension to the left halfplane of the scalar product of Hecke series with magnitude characters /; On the density conjecture for Dirichlet series /; A functional equation for Dirichlet series and the problem of divisors in arithmetic progressions /; Upper bounds and numerical calculation of the number of ideal classes of real quadratic fields /; On systems of congruences /; On the representation of numbers by positive binary diagonal quadratic forms /; Asymptotic behavior and ergodic properties of solutions of the generalized Hardy-Littlewood equation /; Sets of nonnegative integers not containing an arithmetic progression of length /; An estimate for a certain sum extended over the primes of an arithmetical progression /; Finite groups whose proper subgroups all admit nilpotent partitions /; Groups with a normalizer condition for closed subgroups /; Some finiteness conditions in the theory of semigroups /; Semigroups given by identities with distinguished elements /; Identical relations on varieties of quasigroups /; On a theorem on infinite dimensionality of an associative algebra /; Invariant measures on Boolean algebras / A. I. Vinogradov; A. I. Vinogradov; A. F. Lavrik; I. S. Slavutskii; A. A. Karacuba; G. A. Lomadze; B. M. Bredihin and Ju. V. Linnik; Tkacenko Ju. T.; I. M. Vinogradov; V. M. Busarkin and A. I. Starostin; V. I. Usakov; L. N. Sevrin; Birjukov. A. P.; A. I. Malcev; E. B. Vinberg; D. A. Vladimirov