Carl Friedrich Geiser

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Carl Friedrich Geiser
Geiser in the kettledrum

Carl Friedrich Geiser (born February 26, 1843 in Langenthal ; † March 7, 1934 in Küsnacht ) was a Swiss mathematician who worked at the Swiss Federal Institute of Technology in Zurich . He mainly dealt with algebraic geometry , in which he found, among other things, the Geiser involution . His Geiser minimal surface is also known from investigations into algebraic minimal surfaces.

Life

Geiser's father was a butcher and innkeeper. Jakob Steiner , Geiser's great-uncle, got Geiser to study mathematics. Geiser initially studied four semesters from 1859 to 1861 at the Polytechnic in Zurich and then went to Berlin for four semesters to study with Karl Weierstrass and Leopold Kronecker . Since the support from his parents was insufficient, he gave private lessons on the mediation of Weierstrass and Kronecker.

In 1863 he returned to Zurich, where he and Theodor Reye, after the death of Joseph Wolfgang von Deschwanden (1819–1866), represented his chair for descriptive geometry until it was filled again in May 1867 by Wilhelm Fiedler . On July 28, 1866, Geiser received his doctorate from Ludwig Schläfli in Bern as the latter's first doctoral student ( contributions to synthetic geometry ). He had already completed his habilitation in 1863 and was a private lecturer in pure and applied mathematics from 1863 to 1873 , from 1869 titular professor and finally from 1873 to 1913 full professor for higher mathematics and synthetic geometry. He taught algebraic geometry , differential geometry and the theory of invariants and published on algebraic geometry and minimal surfaces. Geiser was director of the Polytechnic from 1881 to 1887 and from 1891 to 1895. He wasn't a friend of the weapons students .

In addition to his research results, Geiser's participation in the development of the Swiss education system is also remarkable. His connections to important politicians and mathematicians, for whom he owed Steiner, helped him. He published lecture notes and papers left by Steiner. The first international mathematicians' congress took place at the Polytechnic under Geiser in 1897 .

In 1888 he was elected a member of the German Academy of Sciences Leopoldina . In 1932 he became an honorary member of the Leopoldina.

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Geiser mainly dealt with algebraic geometry , in which he found, among other things, the Geiser involution that is named after him today . He also published in the field of minimal surfaces .

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Individual evidence

  1. ↑ Emch: Carl Friedrich Geiser , 1938 (English)
  2. ↑ List of all professors sorted according to entry at ETH Zurich
personal data
SURNAME Geiser, Carl Friedrich
BRIEF DESCRIPTION Swiss mathematician
DATE OF BIRTH February 26, 1843
PLACE OF BIRTH Langenthal
DATE OF DEATH March 7, 1934
Place of death Küsnacht