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Karl Emanuel Robert Fricke (24 September 1861 – 18 July 1930) was a German
mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...
, known for his work in
complex analysis Complex analysis, traditionally known as the theory of functions of a complex variable, is the branch of mathematical analysis that investigates functions of complex numbers. It is helpful in many branches of mathematics, including algebraic ...
, especially on elliptic, modular and automorphic functions. He was one of the main collaborators of
Felix Klein Felix Christian Klein (; ; 25 April 1849 – 22 June 1925) was a German mathematician and Mathematics education, mathematics educator, known for his work in group theory, complex analysis, non-Euclidean geometry, and the associations betwe ...
, with whom he produced two classic, two-volume monographs on elliptic modular functions and automorphic functions. In 1893 in Chicago, his paper ''Die Theorie der automorphen Functionen und die Arithmetik'' was read (but not by Fricke) at the International Mathematical Congress held in connection with the
World's Columbian Exposition The World's Columbian Exposition, also known as the Chicago World's Fair, was a world's fair held in Chicago from May 5 to October 31, 1893, to celebrate the 400th anniversary of Christopher Columbus's arrival in the New World in 1492. The ...
. From 1894 to 1930 Fricke was professor of Higher Mathematics at the Technische Hochschule Carolo-Wilhelmina in
Braunschweig Braunschweig () or Brunswick ( ; from Low German , local dialect: ) is a List of cities and towns in Germany, city in Lower Saxony, Germany, north of the Harz Mountains at the farthest navigable point of the river Oker, which connects it to the ...
.


Personal life

On 4 August 1894, Fricke married Eleonore Flender (1873-1912), daughter of Hermann August Flender and Aline Flender (
née The birth name is the name of the person given upon their birth. The term may be applied to the surname, the given name or to the entire name. Where births are required to be officially registered, the entire name entered onto a births registe ...
Klein) in
Düsseldorf Düsseldorf is the capital city of North Rhine-Westphalia, the most populous state of Germany. It is the second-largest city in the state after Cologne and the List of cities in Germany with more than 100,000 inhabitants, seventh-largest city ...
. She was a niece of
Felix Klein Felix Christian Klein (; ; 25 April 1849 – 22 June 1925) was a German mathematician and Mathematics education, mathematics educator, known for his work in group theory, complex analysis, non-Euclidean geometry, and the associations betwe ...
with whom he worked. They had two children; * Gertrud Fricke (1895-1975) * Paul Fricke (1896-1961) His wife died in 1912 aged 49. On 7 March 1925, aged 64, he remarried to Emilie Anna Elise colloquially known as Emmy (1877-1952). She was the seventh of nine children of Alfred Lämmerhirt. They had no children. Fricke died on 18 July 1930 in
Bad Harzburg Bad Harzburg (; Eastphalian dialect, Eastphalian: ''Bad Harzborch'') is a spa town in central Germany, in the Goslar (district), Goslar district of Lower Saxony. It lies on the northern edge of the Harz mountains and is a recognised saltwater spa ...
aged 68.


See also

* Fricke involution


Bibliography

* * * * *; *; *


References


External links

* * 1861 births 1930 deaths People from Helmstedt 19th-century German mathematicians 20th-century German mathematicians German mathematical analysts Group theorists People from the Duchy of Brunswick Academic staff of TU Braunschweig Mathematicians from the German Empire Leipzig University alumni Presidents of the German Mathematical Society {{Germany-mathematician-stub