Person: Chen, Kuo Tsai
KuoTsai Chen was a Chineseborn mathematician who worked in algebraic topology and analysis.
Mathematical Profile (Excerpt):
 Chen graduated with a Bachelor of Science degree in 1946.
 Chen moved to Shanghai where he was employed as an assistant at the Mathematics institute of the Academia Sinica.
 After working at the Academia Sinica for one year, Chen was advised to go to the United States to gain a doctorate.
 However Eilenberg had accepted an appointment at Columbia University in New York so Chen followed his supervisor there.
 Chen supported himself by taking two appointments while in New York, the first appointment was as a mathematics instructor at the National Bible Institute which he held from 1948 to 1950.
 In the first course he gave in Hong Kong, Chester Chen, as he had become known, met a charming sophomore, Julia TseYee Fong, who became his bride in 1953.
 After leaving Hong Kong in 1958, Chen went to Brazil where he was appointed as an Associate Professor at the Instituto Tecnologico de Aeronautica in São Jose dos Campos.
 His work is intimately related to the theory of minimal models as developed by Dennis Sullivan, whose own work was in part inspired by the research of Chen.
 An outstanding and original mathematician, Chen's work falls naturally into three periods: his early work on group theory and links in the three sphere; his subsequent work on formal differential equations, which gradually developed into his most powerful and important work; and his work on iterated integrals and homotopy theory, which occupied him for the last twenty years of his life.
 The goal of Chen's iterated integrals program, which is a de Rham theory for path spaces, was to study the interaction of topology and analysis through path integration.
 Chen was advisor to six doctoral students at the University of Illinois and these graduated between 1970 and 1980.
Born 15 July 1923, Chekiang (now Zhejiang), China. Died August 1987, Urbana, USA.
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Origin China
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive