Issai Schur (10 January 1875 – 10 January 1941[1]) was a Russian mathematician who worked in Germany for most of his life. He studied at the University of Berlin. He obtained his doctorate in 1901, became lecturer in 1903 and, after a stay at the University of Bonn, professor in 1919.
As a student of Ferdinand Georg Frobenius, he worked on group representations (the subject with which he is most closely associated), but also in combinatorics and number theory and even theoretical physics. He is perhaps best known today for his result on the existence of the Schur decomposition and for his work on group representations (Schur's lemma).
Schur published under the name of both I. Schur, and J. Schur, the latter especially in Journal für die reine und angewandte Mathematik. This has led to some confusion.[2]
^Ledermann, Walter, and Neumann, Peter M.; "The Life of Issai Schur through Letters and Other Documents", in Joseph, Melnikov, Rentschler (2003), p. 45.
^Ledermann, W. (1983). "Issai Schur and his school in Berlin". Bull. London Math. Soc. 15 (2): 97–106. doi:10.1112/blms/15.2.97.
IssaiSchur (10 January 1875 – 10 January 1941) was a Russian mathematician who worked in Germany for most of his life. He studied at the University of...
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matrix. The result is named after IssaiSchur (Schur 1911, p. 14, Theorem VII) (note that Schur signed as J. Schur in Journal für die reine und angewandte...
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In mathematical analysis, the Schur test, named after German mathematician IssaiSchur, is a bound on the L 2 → L 2 {\displaystyle L^{2}\to L^{2}} operator...
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by Leon Lichtenstein together with Konrad Knopp, Erhard Schmidt, and IssaiSchur. Past editors include Erich Kamke, Friedrich Karl Schmidt, Rolf Nevanlinna...
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Bieberbach theorem [ru] on space groups. In 1928 Bieberbach wrote a book with IssaiSchur titled Über die Minkowskische Reduktiontheorie der positiven quadratischen...