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Sathamangalam Ranga Iyengar Srinivasa Varadhan FRS (born 2 January 1940) is an Indian American mathematician who is known for his fundamental contributions to probability theory and in particular for creating a unified theory of large deviations. Since 2009 he has been one of the Jury Chairs for the Infosys Prize in the discipline of Mathematical Sciences.〔(Jury chairs by year )〕 ==Early life and education== Srinivasa Varadhan, known also as Raghu to friends, was born in Chennai (previously Madras) in 1940.〔(Interview with Srinivasa Varadhan ), http://gonitsora.com〕 Varadhan received his undergraduate degree in 1959 from Presidency College, Madras, and then moved to the Indian Statistical Institute in Kolkata. He was one of the "famous four" (the others were R. Ranga Rao, K. R. Parthasarathy, and Veeravalli S. Varadarajan ) in ISI during 1956-1963.〔(【引用サイトリンク】title=S. R. Srinivasa Varadhan )〕 He received his doctorate from ISI in 1963 under C. R. Rao,〔(List of degree / diploma / certificate recipients of ISI ), web site at the Indian Statistical Institute, accessed 22 March 2007.〕 who arranged for Andrey Kolmogorov to be present at Varadhan's thesis defense.〔(S. R. Srinivasa Varadhan's Biography ), Allvoices, accessed 1 August 2010.〕 Since 1963, he has worked at the Courant Institute of Mathematical Sciences at New York University, where he was at first a postdoctoral fellow (1963–66), strongly recommended by Monroe D. Donsker. Here he met Daniel Stroock, who became a close colleague and co-author. In an article in the ''Notices of the American Mathematical Society'', Stroock recalls these early years: Varadhan is currently a professor at the Courant Institute.〔(Announcement of the ) 1996 Steele Prizes at the American Mathematical Society web site, accessed 21 February 2007.〕〔Srinivasa Varadhan is known as S R S Varadhan for short and Raghu to his friends and colleagues. His father, Ranga Iyengar, was a science teacher who became the Principal of the Board High School in Ponneri (Biography ) (PDF), from the Abel Prize web site, accessed 22 March 2007.〕 He is known for his work with Daniel W. Stroock on diffusion processes, and for his work on large deviations with Monroe D. Donsker. Varadhan is married to Vasundra Varadhan who is also an academic (in media studies in the Gallatin School of Individualized Study). They have two sons, one of whom died in the September 11 attacks in 2001. His other son, Ashok, is an executive at Goldman Sachs in New York City.〔(【引用サイトリンク】title=Goldman Promotes Ashok Varadhan to Co-Head of Securities )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「S. R. Srinivasa Varadhan」の詳細全文を読む スポンサード リンク
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