| Contents | |
| Message from the Editorial Board | 5 |
| MATHEMATICS | |
| Arzikulov Z. O. Boundary value problems for the three-dimensional Helmholtz equation in the unbounded octant, square and half space | 7 |
| Balkizov Zh. A. The first boundary value problem for a model equation of parabolic-hyperbolic type of the third order | 20 |
| Ruziev M. Kh., Zunnunov R. T., Yuldasheva N. T., Rakhimova G. B. Bitsadze-Samarskii type problem for the diffusion equation and degenerate hyperbolic equation | 33 |
| Eneeva L. M. Cauchy problem for fractional order equation with involution | 43 |
| MATHEMATICAL MODELING | |
| Alimova N. B. Mathematical modeling of the neuron autocoling in the cell membrane using the fractional model of FitzHugh-Nagumo with the function of irritant intensity | 56 |
| Kazakov E. A., Vodinchar G. M.. Stochastic two-mode hereditary model of a cosmic dynamo | 70 |
| Israyiljanova G. S., Karimov Sh. T., Parovik R. I. Mathematical fractional Zeeman model for describing cardiac contractions | 83 |
| Tverdyi D. A., Makarov E. O., Parovik R. I. Identification of parameters of the mathematical α-model of radon transport in the accumulation chamber based on data from the Karymshina site in Kamchatka | 95 |
| 85 years of Professor M.M. Aripov | 120 |
| 55 years to the Director of IAMA KBSC RAS A.V. Pskhu | 123 |
