Person: Heun, Karl
Karl Heun was a German mathematician best known for the Heun differential equation which generalises the hypergeometric differential equation.
Mathematical Profile (Excerpt):
 Heun stayed in Halle only between April and October 1880, probably due to the deteriorating health of Heine who died in 1881.
 Heun then moved to England and taught for two and a half years (18831885) at the Public School in Uppingham.
 In 1900 Heun was honoured with the title professor, and in 1902 he was nominated as first candidate for the vacant chair in technical mechanics at Technische Hochschule Karlsruhe.
 Heun accepted this offer and stayed in Karlsruhe until his death in 1929.
 His assistants in Karlsruhe were Georg Hamel (from 1902 to 1905), Max Winkelmann (from 1905 to 1911) and Fritz Noether (from 1911 to 1918).
 Kurt von Sanden was his student from 1905 to 1909, and he became Heun's successor in 1923.
 Heun did not recover from a stroke he suffered in 1921 and retired in 1922.
 The Heun equation is a second order linear differential equation of the Fuchsian type with four singular points.
Born 3 April 1859, Wiesbaden, Germany. Died 10 January 1929, Karlsruhe, Germany.
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References
Adapted from other CC BYSA 4.0 Sources:
 Oâ€™Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive