Mathematician:Issai Schur

Jewish mathematician of Russian descent working mainly in group theory and combinatorics.

Worked most of his life in Germany, then emigrated to Palestine in 1939 as a result of political persecution, and died a pauper.

Nationality
Russian

History

 * Born: January 10, 1875, Mogilev, Belarus
 * Died: January 10, 1941, Tel Aviv, Palestine (now Israel)

Theorems and Definitions

 * Schur Complement
 * Schur Index
 * Schur Indicator (otherwise known as Frobenius-Schur Indicator, with Ferdinand Georg Frobenius)
 * Schur Multiplier
 * Schur Orthogonality Relations
 * Schur Polynomial
 * Skew Schur Function
 * Schur Test
 * Schur's Inequality
 * Schur's Theorem (Group Theory)
 * Schur's Theorem (Ramsey Theory)
 * Schur-Convex Function
 * Schur-Concave Function
 * Lehmer-Schur Algorithm (with Derrick Henry Lehmer)
 * Schur's Property for Normed Spaces
 * Jordan-Schur Theorem (with Camille Jordan)
 * Schur's Lemma (Representation Theory)
 * Schur's Lemma (Riemannian Geometry)
 * Schur–Zassenhaus Theorem (with Hans Zassenhaus)
 * Schur Product (also known as the Hadamard Product)

Books and Papers

 * 1904: Über die Darstellung der endlichen Gruppen durch gebrochene lineare Substitutionen
 * 1905: Neue Begründung der Theorie der Gruppencharaktere
 * 1907: Untersuchungen über die Darstellung der endlichen Gruppen durch gebrochene lineare Substitutionen
 * 1911: Bemerkungen zur Theorie der Beschränkten Bilinearformen mit unendlich vielen Veränderlichen
 * 1921: Über lineare Transformationen in der Theorie der unendlichen Reihen