### About the author

# Magomed-Kasumov Magomedrasul Grozbekovich

### Senior researcher in the Department of mathematics and informatics of the Dagestan scientific center of the Russian academy of sciences, candidate of physical and mathematical sciences. Research interests: functional analysis, the theory of functions of real variable, approximation theory, variable exponent Lebesgue spaces.

**Workplace**: Department of Mathematics and Informatics, Dagestan Scientific Center, Russian Academy of Sciences