High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Stefan Mazurkiewicz (September 25, 1888 in Warsaw, then Russian Empire June 19, 1945, Grodzisk Mazowiecki, Poland) was a Polish mathematician who worked in mathematical analysis, topology, and probability. He was a student of Wac aw Sierpi ski and a member of the Polish Academy of Learning (PAU). His students included Karol Borsuk, Bronis aw Knaster, Kazimierz Kuratowski, Stanis aw Saks, and Antoni Zygmund. For a time Mazurkiewicz was a professor ath the University of Paris, however he spent most of his career as a professor at the University of Warsaw.