Issai Schur
| Issai Schur | |
|---|---|
 |
|
| Born |
January 10, 1875 Mogilev, Russian Empire |
| Died | January 10, 1941 (aged 66) Tel Aviv, Mandatory Palestine |
| Residence | Germany |
| Fields | Mathematics |
| Doctoral advisor |
Georg Frobenius Lazarus Fuchs |
| Doctoral students |
Richard Brauer Robert Frucht Maximilian Herzberger Eberhard Hopf Bernhard Neumann Rose Peltesohn Heinz Prüfer Richard Rado Isaac Jacob Schoenberg Arnold Scholz Wilhelm Specht Karl Dörge |
Issai Schur (January 10, 1875 – January 10, 1941) was a mathematician who worked in Germany for most of his life. He studied at Berlin. He obtained his doctorate in 1901, became lecturer in 1903 and, after a stay at Bonn, professor in 1919.
As a student of 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.
Issai Schur was the son of the businessman Moses Schur and his wife Golde Schur (née Landau). He was born in Mogilev on the Dnieper River in what was then the Russian Empire. Schur used the name Schaia rather than Issai up in his middle twenties. Schur's father may have been a wholesale merchant.
In 1888, at the age of 13, Schur went to Liepāja ( Courland, now in Latvia), where his married sister and his brother lived, 640 km north-west of Mogilev. Kurland was one of the three Baltic governorates of Tsarist Russia, and since the Middle Ages the Baltic Germans were the trend-setting social class. The local Jewish community spoke mostly German and not Yiddish.
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