Jan Łukasiewicz
Polish logician, mathematician, philosopher, rector of the University of Warsaw (1878-1956) · Ireland · On the map · Academics · Died at 77
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.
Jan Łukasiewicz is read about 104 times a day, in 41 languages.
A typical day, 30 days to 6 November 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 110 days, one point a day.
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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.
