1. Academician Anatolii Fedorovich Sidorov (On the 90th Anniversary of His Birth)

   Events 14 September 2023 Pages: S1 - S3

2. Optimal Recovery on Classes of Functions Analytic in an Annulus

   • O. V. Akopyan
   • R. R. Akopyan

   OriginalPaper 14 September 2023 Pages: S4 - S19

3. Free Vibration Analysis of a Cylindrical Shell of Variable Thickness Partially Filled with Fluid

   • S. A. Bochkarev
   • V. P. Matveenko

   OriginalPaper 14 September 2023 Pages: S20 - S32

   

4. Operator Estimates in Two-Dimensional Problems with a Frequent Alternation in the Case of Small Parts with the Dirichlet Condition

   • D. I. Borisov

   OriginalPaper 14 September 2023 Pages: S33 - S52

5. Some Properties of Ultrafilters Related to Their Use As Generalized Elements

   • A. G. Chentsov

   OriginalPaper 14 September 2023 Pages: S53 - S68

6. Asymptotics of a Solution to an Optimal Control Problem with Integral Convex Performance Index, Cheap Control, and Initial Data Perturbations

   • A. R. Danilin
   • A. A. Shaburov

   OriginalPaper 14 September 2023 Pages: S69 - S77

7. Quasilinear Equations with a Sectorial Set of Operators at Gerasimov–Caputo Derivatives

   • V. E. Fedorov
   • K. V. Boyko

   OriginalPaper 14 September 2023 Pages: S78 - S89

8. Perturbation of a Simple Wave in a Domain Wall Model

   • L. A. Kalyakin

   OriginalPaper 14 September 2023 Pages: S90 - S100

   

9. Finite Groups with Hereditarily \(G\)-Permutable Minimal Subgroups

   • S. F. Kamornikov
   • V. N. Tyutyanov

   OriginalPaper 14 September 2023 Pages: S101 - S108

10. The Problem of Diffusion Wave Initiation for a Nonlinear Second-Order Parabolic System

    • A. L. Kazakov
    • P. A. Kuznetsov
    • L. F. Spevak

    OriginalPaper 14 September 2023 Pages: S109 - S126

    

11. On the Group Classification of Ideal Gas-Dynamic Relaxing Media

    • S. V. Khabirov

    OriginalPaper 14 September 2023 Pages: S127 - S137

12. Assimilation of Boundary Data for Reconstructing the Absorption Coefficient in a Model of Stationary Reaction–Convection–Diffusion

    • A. I. Korotkii
    • I. A. Tsepelev

    OriginalPaper 14 September 2023 Pages: S138 - S153

    

13. Zero-Order Asymptotics for the Solution of One Type of Singularly Perturbed Linear–Quadratic Control Problems in the Critical Case

    • G. A. Kurina
    • Nguyen Thi Hoai

    OriginalPaper 14 September 2023 Pages: S154 - S169

    

14. On an Element-by-Element Description of the Monoid of all Endomorphisms of an Arbitrary Groupoid and One Classification of Endomorphisms of a Groupoid

    • A. V. Litavrin

    OriginalPaper 14 September 2023 Pages: S170 - S185

15. Simple Invariant Solutions of the Dynamic Equation for a Monatomic Gas

    • R. F. Nikonorova

    OriginalPaper 14 September 2023 Pages: S186 - S203

    

16. Richardson Method for a Diffusion Equation with Functional Delay

    • V. G. Pimenov
    • A. B. Lozhnikov

    OriginalPaper 14 September 2023 Pages: S204 - S215

17. On Essential Values of Oscillation Exponents for Solutions of a Linear Homogeneous Two-Dimensional Differential System

    • A. Kh. Stash

    OriginalPaper 14 September 2023 Pages: S216 - S229

18. Zeros of Solutions of Third-Order L–A Pairs and Linearizable Ordinary Differential Equations

    • B. I. Suleimanov

    OriginalPaper 14 September 2023 Pages: S230 - S238

19. On Some Classes of Free Convection Motions

    • O. N. Ul’yanov
    • L. I. Rubina

    OriginalPaper 14 September 2023 Pages: S239 - S256

20. Solution of a Parabolic Hamilton–Jacobi Type Equation Determined by a Simple Boundary Singularity

    • S. V. Zakharov

    OriginalPaper 14 September 2023 Pages: S257 - S269

    

21. Erratum to: Assimilating Data on the Location of the Free Surface of a Fluid Flow to Determine Its Viscosity

    • A. I. Korotkii
    • I. A. Tsepelev
    • A. T. Ismail-Zadeh

    OriginalPaper 14 September 2023 Pages: S270 - S270