Jan Łukasiewicz
Polish logician and philosopher
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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. Wikipedia
Born: December 21, 1878, Lviv, Ukraine
Died: February 13, 1956 (age 77 years), Dublin, Ireland