Julius Wolff (mathematician)

Julius Wolff
Julius Wolff (rightmost in top row) at the International Congress of Mathematicians, Zürich 1932
Born (1882-04-18)April 18, 1882
Nijmegen
Died February 8, 1945(1945-02-08) (aged 62)
Bergen-Belsen concentration camp
Alma mater Universiteit van Amsterdam
Known for Denjoy–Wolff theorem, boundary version of the Schwarz lemma
Spouse(s) Betsy Gersons (Tilburg 12 Jun 1889 – Bergen-Belsen 9 Mar 1945)
Children Louis (died 11 May 1940 in Amsterdam), Ernst (Groningen 9 Oct 1919 – Bergen-Belsen 3 Mar 1945)
Scientific career
Thesis Dynamen, beschouwd als duale vectoren (1908)
Doctoral advisor Diederik Johannes Korteweg
Doctoral students Willem Burgers, Cornelis Campagne, Gerrit Deinema, Jan Deknatel, Adrianus Dubbeld, Bastiaan Grootenboer, Albertus van Haselen, Johannes Hoekstra, Frans de Kok, Jan van Kuik, Herman Looman, Johanna Marx, Johannes Nagel, Frederik Nijhoff, Jan van de Putte, Joël Rozenberg, Johannes Thie, Cornelis Visser, Mels van Vlaardingen, Sigofred Vles, Pieter Vredenduin, Johan Wansink, Berend Wever, Wilhelm Wieringa, Egbertha Zwanenburg

Julius Wolff (18 April 1882 in Nijmegen – 8 February 1945 in Bergen-Belsen)[1] was a Dutch mathematician, known for the Denjoy–Wolff theorem and for his boundary version of the Schwarz lemma.[3][4][5]

Wolff studied mathematics and physics at the University of Amsterdam, where he earned his doctorate in 1908 under Korteweg with thesis Dynamen, beschouwd als duale vectoren.[6] From 1907 to 1917 he taught at secondary and grammar schools in Meppel, Middelburg, and Amsterdam. In 1917 Wolff was appointed Professor of differential calculus, theory of functions and higher algebra at the University of Groningen and in 1922 at the University of Utrecht. He was also a statistical advisor for the life insurance company (or co-operative distributive society) "Eigen Hulp," (a predecessor of AEGON) with offices at The Hague.[7]

Publications

  • Wolff, J. (1926), "Sur l'itération des fonctions holomorphes dans une région, et dont les valeurs appartiennent à cette région", C. R. Acad. Sci., Paris, 182: 42–43
  • Wolff, J. (1926), "Sur une généralisation d'un théorème de Schwarz", C. R. Acad. Sci., Paris, 182: 918–920
  • Wolff, J. (1931). Fourier'sche Reihen, mit Aufgaben. Groningen: P. Noordhoff. [8]

References

  1. ↑ Joods Monument - Julius Wolff
  2. 1 2 quoted from Gerard Alberts, Amsterdam, blog post of Feb. 3, 2003 at mathforum.org
  3. ↑ J. A. Barrau (1948). "In Memoriam Prof. Dr. J. Wolff". Nieuw Archief voor Wiskunde. 2 (22): 113&mdash, 114. with portrait[2]
  4. ↑ J. G. van der Corput (1948). "Wiskunde". In Karel Frederik Proost and Jan Romein. Geestelijk Nederland 1920-1940 (PDF). II. Amsterdam: Kosmos. pp. 255&mdash, 291 (263&mdash, 299 in the pdf file). This article has a separate one-page-section on the importance of J. Wolff (p.279-280 in the pdf file), and a portrait (p.275).[2]
  5. ↑ (J.A. van Maanen:) Julius Wolff (1882-1945) (Biography in Dutch)
  6. ↑ Julius Wolff at the Mathematics Genealogy Project
  7. ↑ Joods Monument - Julius Wolff and his family
  8. ↑ Moore, C. N. (1934). "Review: Fourier'sche Reihen, mit Aufgaben, by J. Wolff". Bull. Amer. Math. Soc. 40 (1): 19–20. doi:10.1090/s0002-9904-1934-05774-4.
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