HELLMUTH KNESER

'Hellmuth Kneser' (April 16, 1898 - August 23, 1973) was a 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 is the son of the mathematician Adolf Kneser and the father of the mathematician Martin Kneser. He assisted Wilhelm Süss in the founding of the Mathematisches Forschungsinstitut Oberwolfach and served as the director of the institute from 1958 - 1959.
Kneser was a student of David Hilbert. He was an advisor of a number of notable mathematicians, including Reinhold Baer.

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