**Nikolai Aleksandrovich Shanin** (Russian: Николай Александрович Шанин) (25 May 1919 Pskov – 17 September 2011) was a Russian mathematician who worked on topology and constructive mathematics. He introduced the delta-system lemma and the caliber of a topological space.

## Further reading

- Vsemirnov, M A, "Nikolai Aleksandrovich Shanin (on his 80th birthday)",
*Russian Math. Surveys*,**56**(3): 601–605, doi:10.1070/RM2001v056n03ABEH000412 - Vsemirnov, M A; et al. (2013), "Nikolai Aleksandrovich Shanin (obituary)",
*Russ. Math. Surv.*,**68**(4): 763–767, doi:10.1070/RM2013v068n04ABEH004852

## External links

- Nikolai Aleksandrovich Shanin at the Mathematics Genealogy Project
- Nikolai Aleksandrovich Shanin at the Steklov Institute of Mathematics at St. Petersburg