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A hypothesis that stopped being a conjecture to become a theorem. Beautiful! We are going to talk about Poincaré's theorem, considered one of the seven problems of the millennium. Sponsored by Universitat Politècnica de València UPV (http://www.upv.es) Subscribe to the channel! Follow Eduardo Sáenz de Cabezón: /edusadeci Follow us on Facebook: www.facebook.com/DerivandoYouTube