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|birth_place = [[Debrecen]], [[Kingdom of Hungary|Hungary]] |death_place = [[Budapest]], [[People's Republic of Hungary|Hungary]] ...

...of mathematicians|mathematician]] of [[Jewish]] origin, known for his work in [[functional analysis]], [[group theory]] and [[combinatorics]]. He was a m ...1927-31 he studied at the [[University of Lviv|Jan Kazimierz University]] in [[Lwów]]. ...