Jan Łukasiewicz

Jan Łukasiewicz was a Polish logician and philosopher who is best known for Polish notation and Łukasiewicz logic. His work centred on philosophical logic, mathematical logic and history of logic. He thought innovatively about traditional propositional logic, the principle of non-contradiction and the law of excluded middle, offering one of the earliest systems of many-valued logic. Contemporary research on Aristotelian logic also builds on innovative works by Łukasiewicz, which applied methods from modern logic to the formalization of Aristotle's syllogistic.

21 December 1878

Born on the same birth day (21 December): Archibald Campbell Tait • Buddy Carlyle • Clara Tauson • Danny Duffy • Giuseppina Leone • Glenn Coleman (rugby league) • Joe Paterno • Khris Davis • Leon MacDonald • Luigi d'Este • Luke Brooks • Matías Almeyda • Petro Mohyla • Primo Colón • Ray Romano • Steve Perryman • Thomas Graham (chemist) • Thomas Sankara • Trevor Kincaid

Born in the same month (December 1878): C. Rajagopalachari • Elizabeth Arden • Elvia Carrillo Puerto • Francis A. Nixon • Hans Carossa • Horacio Quiroga • Joseph M. Schenck • Joseph Stalin • Kalle Korhonen • Louis Chevrolet • Mohammad Ali Jauhar • Myer Prinstein • Noël Leslie, Countess of Rothes • Stephen Timoshenko • William Aberhart • Yosano Akiko