Content  | |
| Message from the Editorial Board | 5 |
| MATHEMATICS | |
| Ashurov R. R., Murzambetova M. B. Boundary value problem for a mixed-type equation with a higher order elliptic operator | 7 |
| Dekhkonov F. N. On the control problem associated with the heating process in the bounded domain | 20 |
| Kilichov O. Sh., Ubaydullaev A. N. On one boundary value problem for the fourth-order equation in partial derivatives | 32 |
| Kukushkin M. V. Note on the spectral theorem for unbounded non-selfadjoint operators | 42 |
| Fayziev Yu. E. On a control problem for the subdiffusion equation with a fractional derivative in the sense of Caputo | 62 |
| MATHEMATICAL MODELING | |
| Kumykov T. S. Modeling the growth of flat snow crystals in clouds with fractal structure | 80 |
| Perevaryukha A. Yu. Scenario of the invasive process with delayed regulation | 91 |
| Tsakhoeva A. F., Shigin D. D. Numerical implementation of a mathematical model (SEIRD) based on data from the spread of the fifth wave of COVID-19 in Russia and regions | 103 |
| INFORMATION AND COMPUTATION TECHNOLOGIES | |
| Dimitrichenko D. P. Optimization of the structure of variable-valued logical functions when adding new production rules | 119 |
| Kazakov M. A. Clustering algorithm based on feature space partitioning | 136 |
| Kazakova E. M. A Concise Overview of Particle Swarm Optimization Methods | 150 |
| Serbina L. I. Numerical-analytical method for solving the modified Cauchy problem for the fractional diffusion equation | 175 |
| Shhanukov-Lafishev M. H., Lafisheva M. M., Taisaev I. D. Locally one-dimensional schemes for an equation describing coagulation processes in convective clouds with “memory” | 184 |
| EDUCATIONAL-METHODOLOGICAL MATERIALS | |
| Fedorov B.P. , Bogdanova S. B., Gladkov S. O. On some unknown results related to the nontrivial properties of ordinary triangles. Part 2 | 197 |
| Shcherban’ V. L. How to take from Pascal’s triangle an infinite series of power sums from many variables and arithmetic systems compared modulo a prime number | 222 |
| 50th anniversary of Rekhviashvili S. Sh. | 237 |
