David Drasin
http://dbpedia.org/resource/David_Drasin an entity of type: Thing
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.
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David Drasin (* 3. November 1940 in Philadelphia) ist ein US-amerikanischer Mathematiker, der sich mit Funktionentheorie beschäftigt. Drasin studierte an der Temple University (Bachelor 1962) und promovierte 1966 an der Cornell University bei Wolfgang Fuchs (An integral Tauberian theorem and other topics). Danach war er Assistant Professor, ab 1969 Associate Professor und ab 1974 Professor an der Purdue University. 2005 war er Gastprofessor an der Universität Kiel und 2005/2006 an der Universität Helsinki. Er ist verheiratet und hat drei Kinder.
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David Drasin (Filadélfia, 3 de novembro de 1940) é um matemático estadunidense, que trabalha com teoria das funções. Drasin estudou na Universidade Temple (bacharelado 1962) e obteve um doutorado em 1966 na Universidade Cornell, orientado por Wolfgang Heinrich Johannes Fuchs, com a tese An integral Tauberian theorem and other topics.. Foi depois professor assistente, a partir de 1969 professor associado e a partir de 1974 professor da Universidade de Purdue. Em 2005 foi professor visitante na Universidade de Kiel e em 2005/2006 na Universidade de Helsinque.
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David Drasin
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David Drasin
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David Drasin
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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, (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.
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David Drasin (* 3. November 1940 in Philadelphia) ist ein US-amerikanischer Mathematiker, der sich mit Funktionentheorie beschäftigt. Drasin studierte an der Temple University (Bachelor 1962) und promovierte 1966 an der Cornell University bei Wolfgang Fuchs (An integral Tauberian theorem and other topics). Danach war er Assistant Professor, ab 1969 Associate Professor und ab 1974 Professor an der Purdue University. 2005 war er Gastprofessor an der Universität Kiel und 2005/2006 an der Universität Helsinki. 1976 gab er eine vollständige Lösung des Umkehrproblems der Nevanlinna-Theorie (Wertverteilungstheorie), das von Rolf Nevanlinna 1929 aufgestellt wurde. In den 1930er Jahren wurde es neben Nevanlinna unter anderem von Egon Ullrich untersucht, später dann von Oswald Teichmüller, Hans Wittich und Le Van Thiem (1918–1991) und weiteren Mathematikern. Anatolii Asirovich Goldberg (1930–2008) löste es für den Spezialfall endlich vieler Ausnahmewerte. Für ganze Funktionen wurde es 1962 von Wolfgang Fuchs und Walter Hayman gelöst. Das Problem besteht in der Frage der Existenz einer meromorphen Funktion zu vorgegebenen Werten der Ausnahmewerte und zugehörigen Defektwerten und Verzweigungswerten (mit Nebenbedingungen aus der Nevanlinna-Theorie). Nach Drasin ist das positiv zu beantworten. 1994 war er Invited Speaker auf dem Internationalen Mathematikerkongress (ICM) in Zürich. Seit 1996 ist er Mitherausgeber der Annalen der Finnischen Akademie der Wissenschaften, ist Mitherausgeber von Computational Methods in Function Theory und war von 1968 bis 1971 Mitherausgeber des American Mathematical Monthly. Von 2002 bis 2004 war er Programmdirektor Analysis der National Science Foundation. Er ist verheiratet und hat drei Kinder.
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David Drasin (Filadélfia, 3 de novembro de 1940) é um matemático estadunidense, que trabalha com teoria das funções. Drasin estudou na Universidade Temple (bacharelado 1962) e obteve um doutorado em 1966 na Universidade Cornell, orientado por Wolfgang Heinrich Johannes Fuchs, com a tese An integral Tauberian theorem and other topics.. Foi depois professor assistente, a partir de 1969 professor associado e a partir de 1974 professor da Universidade de Purdue. Em 2005 foi professor visitante na Universidade de Kiel e em 2005/2006 na Universidade de Helsinque. Foi palestrante convidado do Congresso Internacional de Matemáticos em Zurique (1994).
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