Person: Dörge, Karl
Karl Dörge was a German mathematician whose specialties were real functions, probabilities and analytic number theory.
Mathematical Profile (Excerpt):
- Friedrich Dörge was born in Eickendorf near Haldensleben on 16 May 1864.
- Karl spent the first five years of his life in Müllerdorf.
- Until he was thirteen years old, Karl was educated by private tutors.
- Dörge followed this route, enlisted for the army and he passed the Notabitur in Torgau in 1915.
- In 1919, now nearly twenty years old, Dörge was able to continue his education which had been disrupted by the war.
- Dörge's years of study at university had been difficult one since Germany went through a period of hyperinflation which made life close to impossible.
- Dörge habilitated at the University of Cologne in 1926.
- In 1932 Dörge was promoted to extraordinary professor at the University of Cologne.
- This did not directly affect Dörge but, of course, the large impact on mathematics throughout Germany had an indirect impact on everyone.
- (He committed suicide on 26 January 1942 when it was clear he was about to be sent to a concentration camp.) On 26 February 1936 the University of Bonn submitted the following names for the Hausdorff succession to the Ministry of Education: Ernst Kähler, Konrad Knopp and Karl Dörge.
- Dörge remained in Cologne and, perhaps as a consequence of being recommended for a full chair in Bonn, he was appointed to a full chair at Cologne later in 1936.
- Dörge continued working on algebra and number theory.
- Dörge published a number of books.
- Klaus Wagner (31 March 1910 - 6 February 2000) was Dörge's most famous student.
- He received his Ph.D. from the University of Cologne in 1937 advised by Dörge, and taught at Cologne for many years becoming head of the Cologne graph theory school.
- Later in his career Dörge studied universal algebra.
- We should add one further fact about Dörge, namely his passion for art.
- Dörge's copy was made in 1600 while the original now hangs in the Museo Nazionale di Capodimonte in Naples.
Born 5 November 1899, Müllerdorf, near Halle, Saxony, Germany. Died 16 June 1975, Bensberg, Germany.
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Origin Germany
Thank you to the contributors under CC BY-SA 4.0! 
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- non-Github:
- @J-J-O'Connor
- @E-F-Robertson
References
Adapted from other CC BY-SA 4.0 Sources:
- O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive
