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Hellmuth Kneser

Hellmuth Kneser

German mathematician
The basics
Quick Facts
Intro German mathematician
Countries Germany
Occupations Mathematician Topologist University teacher
Gender male
Birth 16 April 1898 (Tartu)
Death 23 August 1973 (Tübingen)
Star sign Aries
Politics Nazi Party
Family
Father: Adolf Kneser
Children: Martin Kneser
Education University of Göttingen
The details
Biography

Hellmuth Kneser (16 April 1898 – 23 August 1973) was a Baltic German mathematician, who made notable contributions to group theory and topology. His most famous result may be his theorem on the existence of a prime decomposition for 3-manifolds. His proof originated the concept of normal surface, a fundamental cornerstone of the theory of 3-manifolds.

He was born in Dorpat, Russian Empire (now Tartu, Estonia) and died in Tübingen, Germany. He was the son of the mathematician Adolf Kneser and the father of the mathematician Martin Kneser. He assisted Wilhelm Süss in the founding of the Mathematical Research Institute of Oberwolfach and served as the director of the institute from 1958 to 1959.

Kneser had formulated the problem of non-integer iteration of functions and proved the existence of the entire Abel function of the exponential; on the base of this Abel function, he constructed the functional square root of the exponential function as a half-iteration of the exponential, i.e. a function φ such that φ(φ(z)) = exp(z).

Kneser was a student of David Hilbert. He was an advisor of a number of notable mathematicians, including Reinhold Baer.

Hellmuth Kneser was a member of the NSDAP and also the SA. In July 1934 he wrote to Ludwig Bieberbach a short note supporting his anti-semitic views and stating: "May God grant German science a unitary, powerful and continued political position."

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References
http://data.bnf.fr/ark:/12148/cb16528617k
http://isni.org/isni/0000000109031303
http://litten.de/fulltext/cara.htm
http://resolver.sub.uni-goettingen.de/purl?GDZPPN002175851
http://socialarchive.iath.virginia.edu/ark:/99166/w6hj9815
http://www-history.mcs.st-andrews.ac.uk/Biographies/Kneser_Hellmuth.html
http://www.genealogy.ams.org/id.php?id=7394
https://books.google.com/books?id=Xa8CNCyohBQC&pg=PA276
https://catalogue.bnf.fr/ark:/12148/cb16528617k
https://d-nb.info/gnd/116253746
https://id.loc.gov/authorities/names/n84802713
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