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Stanisław Ruziewicz (29 August 1889 – 12 July 1941) was a Polish mathematician and one of the founders of the Lwów School of Mathematics.

He was a former student of Wacław Sierpiński, earning his doctorate in 1913 from the University of Lwów; his thesis concerned continuous functions that are not differentiable.[1] He became a professor at the same university (then named Jan Kazimierz University) and rector of the Academy of Foreign Trade in Lwów.[2] During the Second World War, Ruziewicz's home city of Lwów was annexed by the Ukrainian Soviet Socialist Republic, but then taken over by the General Government of German-occupied Poland in July 1941; Ruziewicz was arrested and murdered by the Gestapo on 12 July 1941 in Lwów, during the Massacre of Lwów professors.[3]

The Ruziewicz problem, asking whether the Lebesgue measure on the sphere may be characterized by certain of its properties, is named after him.[4]

References

  1. ^ Stanisław Ruziewicz at the Mathematics Genealogy Project
  2. ^ Rossowski, Stanisław (1861-1940) Red (1932-06-08), Gazeta Lwowska. 1932, nr 128, retrieved 2022-07-20{{citation}}: CS1 maint: numeric names: authors list (link)
  3. ^ Wacław Sierpiński, as quoted in Rotkiewicz, A. (1972), "W. Sierpiński's works on the theory of numbers", Rendiconti del Circolo Matematico di Palermo, Serie II, 21: 5–24, doi:10.1007/BF02844227, MR 0323676: "In July 1941 one of my oldest students Stanislaw Ruziewicz was murdered. He was a retired full professor of Jan Kazimierz University in Lvov, the last rector of Foreign Trade Academy in Lvov, an outstanding mathematician and an excellent teacher."
  4. ^ Lubotzky, Alexander (2010), "2 The Banach–Ruziewicz Problem", Discrete Groups, Expanding Graphs and Invariant Measures, Modern Birkhäuser Classics, Basel: Birkhäuser Verlag, pp. 7–18.


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