His studied in the Mathematics Department of the Faculty of Mathematics and Physics at Moscow University and made remarkable progress, having his first paper published in 1925 while he was still in the middle of his undergraduate course.
Kanyang-aral sa Mathematics Department ng Faculty ng Matematika at Pisika sa Moscow University at ginawa pambihira progreso, sa pagkakaroon ng kanyang unang papel na nai-publish sa 1925 habang siya ay pa rin sa gitna ng kanyang undergraduate course.