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): Alex Wilson (Canadian sprinter) • Bart Millard • Beau Webster • Doug Mulray • François Van der Elst • Gary Peters • George Foster (baseball) • Golden Brooks • Igor Rodionov • Ilona Fehér • Matt Fraction • Richard Carrier • Sandy Nelson • Sophie Guillemin • Steve Gibb • Udit Narayan • Vaira Vīķe-Freiberga • Zoë Kravitz

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