Contents

Russian Mathematics

Vol. 70, No. 2, 2026

On the Analytic System Whose Limit Set Is an Unbounded Cylinder

A. A. Azamov and D. Kh. Ruzimuradova p. 1  abstract

Solution to an Inverse Problem for a Multidimensional Integral Equation of Convolution Type

A. F. Voronin p. 8  abstract

An Unexpected AGM-Type Inequality and a New Characterization of Operator Monotone Functions

T. H. Dinh, A. T. Nguyen, D. A. N. Nguyen, and H. T. L. Truong p. 14  abstract

Questions of Well-Posedness of Inverse Problems for Determining the Right-Hand Side of a One-Dimensional Parabolic Equation

D. K. Durdiev p. 22  abstract

Convergence Rate Estimates for an Iteratively Regularized Gradient Method with an a Posteriori Stopping Rule

M. M. Kokurin p. 34  abstract

An Optimal Interpolation Formula with Derivatives in Sobolev Space

A. R. Hayotov, S. S. Babaev, and N. N. Olimov p. 43  abstract

The Riemann Boundary Value Problem in a Half-Plane for Generalized Analytic Functions with a Supersingular Line

P. L. Shabalin p. 55  abstract

Polyadic ΠΆ-Quasigroups

N. A. Shchuchkin p. 65  abstract

On the Growth of Delta-Subharmonic Functions on an Unbounded Semiring

A. A. Naumova p. 76  abstract

Dynamic Model of an Ornithopter with Elastic High-Aspect-Ratio Flapping Wings

V. N. Paimushin and A. N. Nuriev p. 81  abstract

Regularity of the Components in the Additive Representation of the Solution to an Elliptic Boundary Value Problem with a Point Source

G. O. Trifonova p. 88  abstract