David Drasin
David Drasin (born 3 November 1940, Philadelphia) is an American mathematician, specializing in function theory.

Drasin received in 1962 his bachelor's degree from Temple University and in 1966 his doctorate from Cornell University supervised by Wolfgang Fuchs and Clifford John Earle, Jr. with thesis "An integral Tauberian theorem and other topics". After that he was an assistant professor, from 1969 an associate professor, and from 1974 a full professor at Purdue University. He was visiting professor in 2005 at the University of Kiel and in 2005/2006 at the University of Helsinki.

In 1976, Drasin gave a complete solution to the inverse problem of Nevanlinna theory (value distribution theory), which was posed by Rolf Nevanlinna in 1929. In the 1930s, the problem was investigated by Nevanlinna and by, among others, Egon Ullrich(de) (1902–1957) with later investigations by Oswald Teichmüller (1913–1943), Hans Wittich, Le Van Thiem (1918–1991) and other mathematicians. Anatolii Goldberg (1930–2008) was the first to completely solve the inverse problem in the special case where the number of exceptional values is finite. For entire functions the problem was solved in 1962 by Wolfgang Fuchs and Walter Hayman. The general problem concerns the question of the existence of a meromorphic function at given values of the exceptional values and associated deficiency values and branching values (with constraints from the Nevanlinna theory). Drasin proved that there is a positive answer to Nevanlinna's problem.

In 1994 Drasin was an Invited Speaker at the ICM in Zurich. Since 1996 he is a co-editor of the "Annals of the Finnish Academy of Sciences" and a co-editor of "Computational Methods in Function Theory". He was a co-editor of the American Mathematical Monthly from 1968 to 1971. From 2002 to 2004 he was a program director/analyst for the National Science Foundation.

He is married and has three children.
Q1345
Philadelphia
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Q1420239
Temple University
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Q49115
Cornell University
ORG
Q72994
Wolfgang Fuchs
PER
Q15794582
Clifford John Earle, Jr.
PER
Q217741
Purdue University
LOC
Q156737
University of Kiel
ORG
Q28695
University of Helsinki
ORG
Q1281926
Nevanlinna theory
Concept
Q540981
Rolf Nevanlinna
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None
Egon Ullrich
UNK
de
UNK
Q68507
Oswald Teichmüller
PER
Q6711240
Le Van Thiem
PER
Q4752149
Anatolii Goldberg
PER
Q2544677
Walter Hayman
PER
Q860611
ICM
LOC
Q2707818
American Mathematical Monthly
MEDIA
Q304878
National Science Foundation
Concept
Q1174258
David Drasin
PER
1940-11-03T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
3 November 1940
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1962-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1962
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1966-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1966
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1969-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1969
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1974-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1974
DATE
2005-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2005
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2005-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2005
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1976-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1976
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1929-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1929
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1930-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1930
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1962-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1962
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1994-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1994
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1996-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1996
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1968-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1968
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1971-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1971
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2002-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2002
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2004-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2004
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+2006^^http://www.w3.org/2001/XMLSchema#decimal
2006
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+1902^^http://www.w3.org/2001/XMLSchema#decimal
1902
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+1957^^http://www.w3.org/2001/XMLSchema#decimal
1957
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+1913^^http://www.w3.org/2001/XMLSchema#decimal
1913
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+1943^^http://www.w3.org/2001/XMLSchema#decimal
1943
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+1918^^http://www.w3.org/2001/XMLSchema#decimal
1918
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+1991^^http://www.w3.org/2001/XMLSchema#decimal
1991
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1930
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+2008^^http://www.w3.org/2001/XMLSchema#decimal
2008
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