**Grigori Yakovlevich Perelman** (Russian: Григо́рий Я́ковлевич Пер...

wikipedia - 04 Aug 2019**Grigori Yakovlevich Perelman**(Russian: Григо́рий Я́ковлевич Перельма́н; IPA: [ɡrʲɪˈɡorʲɪj ˈjakəvlʲɪvʲɪtɕ pʲɪrʲɪlʲˈman] ( listen) /pɛrᵻlˈmɑːn/ perr-il-

**MAHN**; born 13 June 1966) is a Russian mathematician. He was the winner of the all-Russian mathematical olympiad. He made a landmark contribution to Riemannian geometry and geometric topology.