Reading list:
“Everything about Kolmogorov was unusual…” by Shiryaev, A. N. https://gwern.net/doc/math/1991-shiryaev.pdf
Andrey Nikolaevich Kolmogorov https://mathshistory.st-andrews.ac.uk/Biographies/Kolmogorov/
A. N. Shiryaev’s “Kolmogorov: Life and Creative Activities” (published in Annals of Probability, 1989) https://projecteuclid.org/journals/annals-of-probability/volume-17/issue-3/Kolmogorov-Life-and-Creative-Activities/10.1214/aop/1176991251.pdf
MATHEMATICS Its Content, Methods, and Meaning by A. D. Aleksandrov, A. N. Kolmogorov, M. A. Lavrent’ev
Gaduate students of Kolmogorov describe what it was like being supervised by Kolmogorov:
“The time of their graduate studies remains for all of Kolmogorov’s students an unforgettable period in their lives, full of high scientific and cultural strivings, outbursts of scientific progress and a dedication of all one’s powers to the solutions of the problems of science. It is impossible to forget the wonderful walks on Sundays to which [Kolmogorov] invited all his own students (graduates and undergraduates), as well as the students of other supervisors. These outings in the environs of Bolshevo, Klyazma, and other places about 30-35 kilometres away, were full of discussions about the current problems of mathematics (and its applications), as well as discussions about the questions of the progress of culture, especially painting, architecture and literature.”