“…This is the Poincaré hypothesis, which was proven in 2003 by the mathematician Grigori Perelman (Leningrad, 1966) who, incidentally, rejected the cash prize. 2 It is worth mentioning that the Clay Mathematics Institute, founded in 1998, is a private, non-profit foundation dedicated to increasing and disseminating mathematical knowledge. For each one of the Millennium Problems, the institute had professional mathematicians in charge of it.…”