Ernst Sigismund Fischer
Mathematician, Academic
1875 – 1954
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Who was Ernst Sigismund Fischer?
Ernst Sigismund Fischer was a mathematician born in Vienna, Austria. He worked alongside both Mertens and Minkowski at the Universities of Vienna and Zurich, respectively. He later became professor at the University of Erlangen, where he worked with Emmy Noether.
His main area of research was mathematical analysis, specifically orthonormal sequences of functions which laid groundwork for the emergence of the concept of a Hilbert space.
The Riesz–Fischer theorem in Lebesgue integration is named in his honour.
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- Born
- Jul 12, 1875
Vienna - Nationality
- Austria
- Profession
- Education
- University of Vienna
- Lived in
- Vienna
- Died
- Nov 14, 1954
Cologne
Submitted
on July 23, 2013
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