Vol. 66, No. 5, 2022

Russian Mathematics

Skew Minimal Surfaces Supported by Two Triangular Frames

M. M. Alimov p. 1 abstract

Meyer Points and Refined Meyer Points for Arbitrary Harmonic Functions

S. L. Berberyan p. 21 abstract

Theories of Propositional Logics and the Converse of Substitution

I. A. Gorbunov p. 26 abstract

Computational Complexity of the Word Problem in Modal and Heyting Algebras with a Small Number of Generators

M. Rybakov p. 33 abstract

Massera Problem for Some Nonautonomous Functional Differential Equations of Neutral Type with Finite Delay

M. Es-saiydy, I. Oumadane and M. Zitane p. 49 abstract

Iteration Method for Solving a Nonlinear Boundary Value Problem with a Point Source

O. A. Zadvornov and G. O. Trifonova p. 60 abstract

Three-Dimensional Nonunimodular Lie Groups with a Riemannian Metric of an Invariant Ricci Soliton and a Semisymmetric Metric Connection

P. N. Klepikov, E. D. Rodionov and O. P. Khromova p. 65 abstract

Approximation of the Lebesgue Constant of the Fourier Operator by a Logarithmic Function

I. A. Shakirov p. 70 abstract