Born May 1915 in Lwów, Austria-Hungary (modern Lviv, Ukraine), he joined the circle of young, talented mathematicians formed around Stefan Banach and Hugo Steinhaus. During the period of German occupation of his hometown he made his living as a lice feeder in the institute of Rudolf Weigl.
Born in 1915, in Lwów, Austria-Hungary (modern Lviv, Ukraine), he became part of a group of young mathematicians who were influenced by Stefan Banach and Hugo Steinhaus. During the German occupation of his hometown, he earned a living as a lice feeder at the institute of Rudolf Weigl.