Zygmunt Janiszewski

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Zygmunt Janiszewski (born June 12, 1888 in Warsaw , † January 3, 1920 in Lwów ) was a Polish mathematician at the Warsaw School of Mathematicians .

Janiszewski studied from 1907 at the University of Zurich , the University of Munich , the University of Göttingen and in Paris at the Sorbonne . There he received his doctorate in 1911 under Henri Lebesgue and taught before the First World War at the Société des cours des sciences in Warsaw, a university illegal under Russian rule , and from 1913 in Lwów (Lemberg). He fought as a soldier of Pilsudski - Legion in World War I and then had to go underground. As Zygmunt Wicherkiewicz he was a. a. Director of an orphanage . After the war he became a professor at Warsaw University in 1918 . He donated his inherited family wealth to charity and education. Together with Wacław Sierpiński and Stefan Mazurkiewicz , he was the founder of the journal Fundamenta Mathematicae . Janiszewski died at the age of 31 from the Spanish flu .

As a mathematician, he was primarily concerned with set theoretical topology and was one of the founders of this direction in Poland, where it flourished in the 1920s.

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