Subject: reference needed Date: Mon, 19 Jan 2004 10:14:59 +0100 From: Gaucher Philippe Organization: PPS To: Don Davis Question for the mailing-list: Could I have please a reference for the general fact (if this is true !) that the homotopy colimit is a colimit in Ho(C) where C is a model category ? If for any given small category I, there exists a model structure on C^I such that the constant diagram functor is a right Quillen functor, it's OK (for example if C is cofibrantly generated). Same question for the homotopy limit. pg.