What is Jan Łukasiewicz?
[[Image:Jan Łukasiewicz.jpg|thumb|250px|Łukasiewicz in November 1935]] In the early 1920s, the Polish mathematician '''Jan Lukasiewicz''' discovered that if operators were written before the [[operand]]s (prefix or [[Prefix notation|Polish notation]]; for example, + a b), the [[parentheses]] are not needed. He was born on 21 December 1878 in [[Lemberg]], [[Galicia]], [[Austria-Hungary]] and died on 13 February 1956 in [[Dublin]], [[Ireland]]. He was aged 77. == More readings == *Łukasiewicz, Jan 1951. ''Aristotle’s syllogistic from the standpoint of modern formal logic''. Oxford University Press. 2nd ed, enlarged 1957. Reprinted by Garland Publishing in 1987. ISBN 0-8240-6924-2 {{DEFAULTSORT:Lukasiewicz, Jan}} [[Category:1878 births]] [[Category:1956 deaths]] [[Category:20th-century Polish philosophers]] [[Category:Polish mathematicians]] [[Category:Polish Roman Catholics]] {{bio-stub}}