Eugen Jahnke

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Paul Rudolf Eugen Jahnke (born November 30, 1863 in Berlin ; † October 18, 1921 there ) was a German mathematician.

Jahnke studied mathematics and physics at the Friedrich-Wilhelms-Universität Berlin , where he studied with Karl Weierstrass and Lazarus Fuchs and in 1886 passed his state examination for higher teaching post. In 1889 he did his doctorate in Halle an der Saale under Albert Wangerin on the integration of ordinary differential equations of the first order. Then he was a teacher at secondary schools in Berlin (including the Friedrichwerdersche Oberrealschule from 1900), where he completed his habilitation in 1901 at the TH Berlin-Charlottenburg and from 1905 became a professor at the Bergakademie in Berlin, which merged with the TH Berlin in 1916. In 1919 he was rector of the TH Berlin.

He was editor of the Archives for Mathematics and Physics and contributor to the yearbook on the progress of mathematics . He wrote an early book on vector calculation and is best known today for his function tables, which first appeared in 1909, were also translated into English and reissued until the 1960s. They were later worked on by Fritz Emde (professor of electrical engineering at the TH Stuttgart ) and others.

Following Ferdinand Caspary , he dealt with vector calculation from the beginning of the 1890s, both starting from Hermann Graßmann and his expansion theory, and applied them to electrodynamics and optics in publications in 1902 and 1904. Also under the influence of Caspary, he wrote papers on the application of theta functions .

At the mining academy, he also taught mechanics and mining technology, inventing a device to control the movement of conveyor cages. He was considered a good teacher and was interested in mathematics education. From 1901 to 1918 he was editor of the Archives for Mathematics and Physics . He also published the Mathematisch-Physikalische Schriften for engineers and students and from 1912 on Dingler's Polytechnisches Journal . Together with Hellmuth Kneser, he was one of the founders of the Berlin Mathematical Society (1901). In 1910 he was elected a member of the Leopoldina .

Fonts

  • Lectures on vector calculation - with applications to geometry, mechanics and mathematical physics . Teubner 1905
  • Function tables with formulas and curves, Teubner . 1909, 1933, 1945, 7th edition 1966, edited by Fritz Emde and later by Friedrich Lösch as tables of higher functions

literature

Individual evidence

  1. ↑ Karin Reich : The beginnings of vector calculation in the "hut": Eugen Jahnke and Max Tolle , in Günter Bayerl, Wolfgang Weber social history of technology. Ulrich Troitzsch on his 60th birthday , Waxmann 1998, p. 171
personal data
SURNAME Jahnke, Eugene
ALTERNATIVE NAMES Jahnke, Paul Rudolf Eugen
BRIEF DESCRIPTION German mathematician
DATE OF BIRTH November 30, 1863
PLACE OF BIRTH Berlin
DATE OF DEATH October 18, 1921
Place of death Berlin