Nikolai Lobachevsky

Nikolai Ivanovich Lobachevsky was a Russian mathematician and geometer, known primarily for his work on hyperbolic geometry, otherwise known as Lobachevskian geometry, and also for his fundamental study on Dirichlet integrals, known as the Lobachevsky integral formula.

1 December 1792

Born on the same birth day (1 December): 9th Dalai Lama • Alain Bashung • Billy Childish • Doug Mulray • Gary Panter • Jan Długosz • Jo Walton • Joachim Hoffmann • Masahudu Alhassan • Nate Torrence • Nozipho Schroeder • Néstor Carbonell • Sophie Hedwig of Brunswick-Wolfenbüttel (1592–1642) • Tahar Ben Jelloun • Tisha Waller

Born in the same month (December 1792): Abraham Jacob van der Aa • Nicolas-Toussaint Charlet • Sylvester Jordan • William II of the Netherlands