I. B. Shmigirilova
M. Kozybaev North Kazakhstan University
Kazakhstan

Irina B. Shmigirilova ‒ Cand. Sci. (Education), Professor, Department of Mathematics and Informatics,

Petropavlovsk.  

Scopus Author ID 57210787308, Researcher ID O-9939-2018.

A. S. Rvanova
ITMO University
Russian Federation

Alla S. Rvanova ‒ Cand. Sci. (Education), Associate Professor, Mathematical Centre,

Saint-Petersburg.

A. A. Tadzhigitov
M. Kozybaev North Kazakhstan University
Kazakhstan

Askar A. Tadzhigitov ‒ Cand. Sci. (Physics-Mathematics), Associate Professor, Department of Mathematics and Informatics,

Petropavlovsk.

O. L. Kopnova
M. Kozybaev North Kazakhstan University
Kazakhstan

Oksana L. Kopnova ‒ M. Sci. (Engineering and Technology), Department of Mathematics and Informatics,

Petropavlovsk.