Contents

Russian Mathematics

---

Vol. 67, No. 9, 2023

---

Invariant Subspaces and Eigenvalues of the Three-Particle Discrete Schrödinger Operators

J. I. Abdullaev, A. M. Khalkhuzhaev and T. H. Rasulov p. 1  abstract

On the Existence and Uniqueness of a Positive Solution to a Boundary Value Problem for a 4nth-Order Nonlinear Ordinary Differential Equation

G. E. Abduragimov p. 16  abstract

On the Localization of Fractal Lines of Discontinuity from Noisy Data

A. L. Ageev and T. V. Antonova p. 23  abstract

Inverse Coefficient Problem for a Fractional-Diffusion Equation with a Bessel Operator

D. I. Akramova p. 39  abstract

Exact Solution for Capillary Waves on the Surface of a Liquid of Finite Depth

M. M. Alimov p. 52  abstract

Transformation Operator for the Schrödinger Equation with Additional Exponential Potential

A. Kh. Khanmamedov and M. F. Muradov p. 68  abstract

Numerical Simulation of Compressible Gas Flow in Flat Channels in the Narrow Channel Approximation

S. Khodjiev p. 76  abstract

---