'''Grigori Perelman''' is a Russian mathematician, notable for proving the greatest unsolved problem of the 20th century, the [[Poincaré conjecture]]. Prior to that work, Perelman became known for giving a short proof of the [[Soul conjecture]]. | '''Grigori Perelman''' is a Russian mathematician, notable for proving the greatest unsolved problem of the 20th century, the [[Poincaré conjecture]]. Prior to that work, Perelman became known for giving a short proof of the [[Soul conjecture]]. |