Home Scientists Pierre Berthelot Pierre Berthelot Scientist Pierre Berthelot (French: [bɛʁtəlo]) is a mathematician at the University of Rennes. He developed crystalline cohomology and rigid cohomology. Personal facts NationalityFrance facebook tumblr linkedin twitter reddit google+ Search Scientist doctoral advisorAlexander Grothendieck doctoral studentClaude Dumas-Montagnon Field of studyMathematics Topical connections Édouard HerriotPrime minister Édouard GoursatScientist Étienne-Louis MalusScientist Émile BorelScientist Aise Johan de JongScientist Henri FrévillePolitician Alexander BeilinsonScientist Pierre Berthelot on Wikipedia Pierre Berthelot External resources http://perso.univ-rennes1.fr/pierre.berthelot