San kɛmɛ ɲɔgɔŋɔna tibitaba kofɛ jatilɔnibaw fɛ, Grigori Perelman ye kɔnjɛkitiri kokɔrɔbɔ yira gafefura saba sanfɛ min labilala san 2002 ani 2003 arXiv sanfɛ.