%0 Journal Article %A V. M. Fedoseev %T Methods of calculating the number $e$ as a topic of educational research %J Matematičeskoe obrazovanie %D 2021 %P 50-53 %N 2 %U http://geodesic.mathdoc.fr/item/MO_2021_2_a6/ %G ru %F MO_2021_2_a6