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Grigori Perelman

After graduation, Perelman began work at the renowned Leningrad Department of [Steklov Institute of Mathematics] of the [USSR Academy of Sciences] , where his advisors were [Aleksandr Danilovich Aleksandrov] and [Yuri Dmitrievich Burago] . In the late 1980s and early 1990s, Perelman held posts at several universities in the United States. In 1991 he spoke at the [Geometry Festival] on [Alexandrov Spaces] . In 1992, he was invited to spend a semester each at the [Courant Institute] in [New York University] and [State University of New York at Stony Brook] where he began work on manifolds with lower bounds on [Ricci Curvature] . From there, he accepted a two-year Miller Research Fellowship at the [University of California, Berkeley] in 1993. He was offered jobs at several top universities in the US, including [Princeton] and [Stanford] , but he rejected them all and returned to the [Steklov Institute] in the summer of 1995 for a research only position.

He has a younger sister, Elena, who is also a mathematician. She received a Ph.D. from [Weizmann Institute of Science] in [Israel] and is a biostatistician at [Karolinska Institutet] , in [Stockholm] , [Sweden] .

Perelman is a talented [violinist] and a strong [table tennis] player.Lobastova and Hirsh

Geometrization and Poincaré conjectures
Until the autumn of 2002, Perelman was best known for his work in [comparison theorem] s in [Riemannian geometry] . Among his notable achievements was a short and elegant proof of the [Soul conjecture] .

The problem

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