Walter Hayman is confirmed dead at the age of 93.

Walter was best known as a German-born British mathematician.

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Walter Hayman | |
---|---|

Born | Walter Kurt Hayman 6 January 1926 |

Died | 1 January 2020 | (aged 93)

Nationality | British |

Education | University of Cambridge |

Known for | Theory of subharmonic functions Univalent function theory |

Spouse(s) | Margaret Hayman (nÃ©e Crann) |

Awards | Berwick Prize (1955) Senior Berwick Prize (1964) De Morgan Medal (1995) |

Scientific career | |

Fields | Complex analysis |

Institutions | King's College, Newcastle University of Exeter Imperial College |

Website | www3 |

Walter Kurt Hayman FRS (6 January 1926 - 1 January 2020) was a British mathematician known for contributions to complex analysis. He was Emeritus Professor at Imperial College London.

Contents

1 Life and work

2 Honours and awards

3 Selected publications

3.1 Papers

3.2 Books

4 Notes

5 References

5.1 Biographical references

5.2 General references

6 External links

Life and work

Hayman was born in Cologne, Germany, the son of Roman law professor Franz Haymann (1874-1947) and Ruth Therese Hensel, daughter of mathematician Kurt Hensel. He was a great-grandson of acclaimed composer Fanny Mendelssohn. Because of his Jewish heritage, he left the Nazi regime in Germany, alone by train in 1938. He continued his schooling at Gordonstoun School, and later at St John's College, Cambridge under John Edensor Littlewood and his doctoral advisor Mary Cartwright. He taught at King's College, Newcastle, and the University of Exeter.

In 1947, he married Margaret Riley Crann: together, they founded the British Mathematical Olympiad.

He is known for his asymptotic results in Bieberbach conjecture in 1955, and for Hayman's alternatives in Nevanlinna Theory. His work with Wolfgang Fuchs gave a solution to an inverse problem of the Nevanlinna theory for entire functions, predating David Drasin's 1976 work.

Honours and awards

Hayman was elected to the Royal Society in 1956 and of the Finnish Academy of Science and Letters in 1978: he was elected "Foreign member" of the Accademia dei Lincei on 16 December 1985. In 1992 he received an honorary doctorate from the Faculty of Mathematics and Science at Uppsala University, Sweden In 1995 he was awarded the De Morgan Medal by the London Mathematical Society. In 2008, an issue of the Journal Computational Methods and Function Theory was dedicated to him on the occasion of his 80th birthday.

Selected publications

Hayman presents a talk at the 2010 One Day Function Theory Meeting.

Papers

Hayman, W. K. (1974), "The local growth of power series: a survey of the Wiman-Valiron method", Canadian Mathematical Bulletin, 17 (3): 317â€“358, CiteSeerXÂ 10.1.1.433.7629, doi:10.4153/CMB-1974-064-0, MRÂ 0385095, ZblÂ 0314.30021.

Hayman, W. K.; Rossi, J. F. (1984), "Characteristic, maximum modulus and value distribution", Transactions of the American Mathematical Society, 284 (2): 651â€“664, doi:10.1090/S0002-9947-1984-0743737-2, MRÂ 0743737, ZblÂ 0547.30023.

Hayman, Walter K. (1993), "A problem on Fourier series arising from an Isoperimetric inequality", in Ricci, Paolo Emilio (ed.), Problemi attuali dell'analisi e della fisica matematica. Atti del simposio internazionale dedicato a Gaetano Fichera nel suo 70o compleanno. Taormina, 15â€“17 ottobre 1992, Roma: Dipartimento di Matematica UniversitÃ di Roma La Sapienza â€“ Aracne Editrice, pp.Â 119â€“125, MRÂ 1249093, ZblÂ 0851.42009.

Hayman, W. K. (2002), "Univalent and Multivalent Functions", in Kuhnau, Reiner (ed.), Geometric Function Theory, Handbook of Complex Analysis, 1, Amsterdam: North-Holland, pp.Â 1â€“36, ISBNÂ 978-0-444-82845-3, MRÂ 1966188, ZblÂ 1069.30018.

Books

Hayman, W. K. (1964), Meromorphic functions, Oxford Mathematical Monographs, Oxford: Clarendon Press, pp.Â XIV+191, MRÂ 0164038, ZblÂ 0115.06203.

Hayman, W. K. (1967), Research Problems in Function Theory, London: Athlone Press, pp.Â vii+56.

Hayman, W. K.; Kennedy, P. B. (1976), Subharmonic functions. Volume 1, London Mathematical Society Monographs, 9, Londonâ€“New York: Academic Press, pp.Â XVII+284, ISBNÂ 978-0-12-334801-2, MRÂ 0460672, ZblÂ 0419.31001.

Hayman, W. K. (1988), Subharmonic functions. Volume 2, London Mathematical Society Monographs, 20, London: Academic Press, pp.Â xiii+875, ISBNÂ 978-0-12-334802-9, MRÂ 1049148, ZblÂ 0699.31001.

Hayman, W. K. (1994) , Multivalent functions, Cambridge Tracts on Mathematics, 110 (Second ed.), Cambridge: Cambridge University Press, pp.Â xii+263, ISBNÂ 978-0-521-46026-2, MRÂ 1310776, ZblÂ 0904.30001.

Hayman, W. K. (2014), My Life and Functions, Logic Press, pp.Â iv+138, ISBNÂ 978-1-326-03020-9

Hayman, W. K.; Lingham, E. F. (2019), Research Problems in Function Theory - Fiftieth Anniversary Edition, Problem Books in Mathematics, Springer, pp.Â VIII+284, ISBNÂ 978-3-030-25164-2

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