Walter Hayman
Walter Kurt Hayman ( born January 6, 1926 in Cologne ) is a British mathematician who deals with complex analysis.
Hayman came to the UK in 1938, where he attended Gordonstoun School in Scotland and at St. John 's College of Cambridge University studied with Mary Cartwright and John Edensor Littlewood received his doctorate with Mary Cartwright. He became Professor of Pure Mathematics at Imperial College, London, where he spent over 30 years head of a school of functional theorists. After retirement, he worked for ten years at York University and is now a Senior Research Fellow at Imperial College.
As a function of theorist he is well known for the asymptotic results in the context of the Bieberbach conjecture (1955 ) and for the Haymansche alternative in the value distribution theory of Rolf Nevanlinna. With Wolfgang Fuchs, he solved the inverse problem of the Nevanlinna theory ( completely dissolved in 1976 by David Drasin ) for entire functions.
In 1956 he became a member of the Royal Society. In 1955 he was awarded the Berwick Prize and in 1964 he was awarded the Senior Berwick Prize. He received in 1995 the De Morgan Medal of the London Mathematical Society. Hayman was in 1954 in Amsterdam (The coefficients of simple and allied functions) and 1970 in Nice ( Subharmonic functions in ) Invited Speaker on the ICM.
His doctoral counts Alan Beardon.
Writings
- Multivalent functions, Cambridge University Press 1958, 1994
- Meromorphic functions, Oxford, Clarendon Press 1964
- Subharmonic Functions, Vol.1 ( PB Kennedy), Academic Press 1976, Vol.2
- Lectures on approximation and value distribution, press Universitaire de Montreal 1982
- Function Theory, in Jean -Paul Pier Development of mathematics 1900-1950, Birkhäuser 1994