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Ernst Jacobsthal

Ernst Jacobsthal German mathematician

German mathematician
The basics
Quick Facts
Intro German mathematician
A.K.A. Ernst Erich Jacobsthal
Countries Germany Norway
Occupations Mathematician Professor Educator
Gender male
Birth 16 October 1882 (Berlin)
Death 6 February 1965 (Überlingen)
Star sign LibraLibra
Family
Siblings: Paul Jacobsthal
The details
Biography

Ernst Erich Jacobsthal (16 October 1882, Berlin – 6 February 1965, Überlingen) was a German mathematician, and brother to the archaeologist Paul Jacobsthal.

In 1906, he earned his PhD at the University of Berlin, where he was a student of Georg Frobenius, Hermann Schwarz and Issai Schur; his dissertation, Anwendung einer Formel aus der Theorie der quadratischen Reste (Application of a Formula from the Theory of Quadratic Remainders), provided a proof that prime numbers of the form 4n + 1 are the sum of two square numbers. In 1934, he was fired from his professorship at the Technische Hochschule Berlin, because of his Jewish origins. In 1939 he fled to Norway and became after the war a professor at the technical university of Trondheim.

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Sources
References
http://genealogy.math.ndsu.nodak.edu/id.php?id=17980
http://isni.org/isni/0000000055696026
http://www.genealogy.ams.org/id.php?id=17980
http://www.numbertheory.org/obituaries/OTHERS/jacobsthal_eng.html
https://d-nb.info/gnd/137692412
https://viaf.org/viaf/81842612
https://www.wikidata.org/wiki/Q77918
https://www.worldcat.org/identities/containsVIAFID/81842612
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