Grigori Yakovlevich Perelman was born in Leningrad, Soviet Union (now Saint Petersburg, Russia) on June 13, 1966, to Jewish parents, [8] [9] [10] Yakov (who now lives in Israel) [8] and Lyubov (who still lives in Saint Petersburg with Perelman). [8] Perelman's mother Lyubov gave up graduate work in mathematics to raise him. Perelman's mathematical talent became apparent …