Mathematician's Day in Russia
December 1 · Level 4 · #1443 of 2238
Mathematician's Day in Russia is a holiday for people who teach, study or simply love maths. It is a nudge that behind everyday technology stand formulas and proofs.
How it is celebrated: universities and schools run open lectures, olympiads and problem-solving contests, and colleagues swap congratulations and jokes about integrals and theorems.
Nikolai Lobachevsky, the creator of non-Euclidean geometry, was born on 1 December 1792. In his geometry, through a point outside a line you can draw many lines that never meet it. He later became rector of Kazan University.