Feit-Thompson true Feit-Thompson theorem has been totally checked in Coq Thursday 20 September 2012, 18:16. We received following mail from Georges Gonthier (see below). It concludes the proof in Coq of the Feit-Thompson theorem. This theorem, also named the Odd Order Theorem, is the first main result in the classification of finite groups. This work was achieved by the team formed by addressees o