Subject: question about homotopy commutative diagram From: Gaucher Philippe Date: Thu, 26 Jul 2007 19:18:54 +0200 Dear all, I'd like to prove that it is possible to rectify a homotopy commutative cube of topological spaces. I know how to do that using the Boardman-Vogt construction but it's very complicated. Does anyone know a paper where this fact is already proved ? Thanks in advance. pg.