Christoph Gudermann

Christoph Gudermann (25 March 1798 – 25 September 1852) was a German mathematician noted for introducing the Gudermannian function and the concept of uniform convergence, and for being the teacher of Karl Weierstrass, who was greatly influenced by Gudermann's course on elliptic functions in 1839–1840, the first such course to be taught in any institute.

Christoph Gudermann
Born	(1798-03-25)25 March 1798 Vienenburg, Holy Roman Empire
Died	25 September 1852(1852-09-25) (aged 54) Münster, Province of Westphalia, Kingdom of Prussia
Nationality	German
Alma mater	University of Göttingen
Known for	Gudermannian function Uniform convergence
Awards	PhD (Hon): University of Berlin (1832)
Scientific career
Fields	Mathematician
Institutions	Münster Academy
Academic advisors	Carl Gauss
Notable students	Karl Weierstrass

Biography

Gudermann was born in Vienenburg. He was the son of a school teacher and became a teacher himself after studying at the University of Göttingen. He began his teaching career in Kleve and then transferred to a school in Münster.

Gudermann introduced the concept of uniform convergence in an 1838 paper on elliptic functions, but only observed it informally, neither formalizing it nor using it in his proofs.^[1] Instead, Weierstrass elaborated and applied uniform convergence.

His researches into spherical geometry and special functions focused on particular cases, so that he did not receive the credit given to those who published more general works. The Gudermannian function, or hyperbolic amplitude, is named after him.

Gudermann died in Münster.