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Grigori Yakovlevich Perelman (/ˈpɛrɨlmən/perr-il-mən[dubious – discuss]; Russian: Григо́рий Я́ковлевич Перельма́н; born 13 June 1966) is a Russian mathematician who has made landmark contributions to Riemannian geometry and geometric topology.
In 1994, Perelman proved the soul conjecture. In 2003, he proved Thurston’s geometrization conjecture. This consequently solved in the affirmative the Poincaré conjecture, posed in 1904, which before its solution was viewed as one of the most important and difficult open problems in topology.
In August 2006, Perelman was awarded the Fields Medal for “his contributions to geometry and his revolutionary insights into the analytical and geometric structure of the Ricci flow.” Perelman declined to accept the award or to appear at the congress, stating: “I’m not interested in money or fame, I don’t want to be on display like an animal in a zoo.” On 22 December 2006, the journal Science recognized Perelman’s proof of the Poincaré conjecture as the scientific “Breakthrough of the Year“, the first such recognition in the area of mathematics.
On 18 March 2010, it was announced that he had met the criteria to receive the first Clay Millennium Prize for resolution of the Poincaré conjecture. On 1 July 2010, he turned down the prize, saying that he considers his contribution to proving the Poincaré conjecture to be no greater than that of Richard Hamilton, who introduced the theory of Ricci flow with the aim of attacking the geometrization conjecture.
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