2025. vol. 53. no. 4

Contents
Message from the Editorial Board	7
MATHEMATICS
Hamoud J., Belov A. Ya. Extremal topological indices with prescribed degree sequences	9
MATHEMATICAL MODELING
Vodinchar G. M., Feshchenko L. K. Multiscale geodynamo model: coupling large-scale and small-scale submodels	29
Sheremetyeva O. V., Shevtsov B. M. Application of the fractional model of deformation activity to the study of the properties of the heredity and non-stationary of the seismic process in the subduction zone of the Kuril-Kamchatka Island arc in the relaxation phase	45
INFORMATION AND COMPUTATIONAL TECHNOLOGY
Luttseva E. A., Vodinchar G. M. Recognizing a group of whistlers in VLF radio signals	59
Parovik R. I. ABMSelkovFracSim 2.0 software package for quantitative and qualitative analysis of the Selkov fractional oscillator	75
PHYSICS
Semakov N. N., Ukolov D. A. Estimation of the south magnetic pole drift velocity in the 20th–21st centuries	93
Stovbun N. S., Bogomolov L. M. Measurements of the vertical electrotelluric field strength in fault zones of the southern part of Sakhalin	105
Khaerdinov N. S. Model of seismic electric field generation in the atmosphere	118
Shevtsov B. M., Sheremetyeva O. V. Earthquake precursors in the theory of criticality of geodeformations	142