The first scientific accomplishment of Perelman was the proof of the Soul conjecture in 1993. The Soul conjecture stated that one can deduce the properties of a mathematical object from only small regions of these objects, called the soul.

What problem did Grigori Perelman solve?

Someone else did something even more amazing than Fischer, then — disappeared, Russian Grigori "Grisha" Perelman. Perelman solved the Poincaré conjecture, the only one of the seven Millennium Prize Problems that has been solved. The award for a solution to any of the problems is US$1 million.

What is Grigori Perelman famous for?

Grigori Perelman is a Russian mathematician who proved the Poincaré Conjecture and who refused to accept a Fields Medal or the $1 000 000 Clay Prize.