Karl Weierstrass
Karl Theodor Wilhelm Weierstrass was a German mathematician often cited as the "father of modern analysis". Despite leaving university without a degree, he studied mathematics and trained as a school teacher, eventually teaching mathematics, physics, botany and gymnastics. He later received an honorary doctorate and became professor of mathematics in Berlin.
31 October 1815
Born on the same birth date (31 October 1815): Thomas Chapman (Australian politician)
Born on the same birth day (31 October): Adelbert Ames • B. H. Liddell Hart • Barrie Keeffe • Christopher Anstey • Daphne Oxenford • Dermot Mulroney • Eddie Kaye Thomas • Frank Shorter • Ken Wahl • Lucious Jackson • Michael Collins (astronaut) • Ollie Johnston • Paul Frampton • Piper Perabo • Reza Pahlavi, Crown Prince of Iran
Born in the same month (October 1815): Camillo Sivori • Dan Emmett • Francis Lubbock • James Agnew • João Maurício Vanderlei, Baron of Cotegipe • Pierre Napoléon Bonaparte • Thomas Chapman (Australian politician) • William J. Hardee • Ľudovít Štúr