Date: Mon, 27 Apr 1998 14:13:37 -0400 (EDT) From: James Stasheff Subject: Re: answer to Stasheff I may not have stated the question clearly enough: The idea is the following: C^*(X;Q) the singular cochain algebra is associative but not commutative over Q we can symmetrize it: u*v = 1/2 (u\cup v \pm v\cup u) etc claim is * is the beginning of an A_\infty algebra query: such that the m_i are sutiably symmetric? anyone know where the details are written down? I've checked with mandell and indeed his work is quite transverse to this - he has E_\infty structures - neither strictly assoc nor strictly comm thogh he does get some lovely results over the algebraic closure of the field with p elements ************************************************************ Until August 10, 1998, I am on leave from UNC and am at the University of Pennsylvania Jim Stasheff jds@math.upenn.edu 146 Woodland Dr Lansdale PA 19446 (215)822-6707 Jim Stasheff jds@math.unc.edu Math-UNC (919)-962-9607 Chapel Hill NC FAX:(919)-962-2568 27599-3250