Does anyone know of any work on the Hochschild cohomology of a category? other than the formal defintion? for a dg category? for a triangulated category in terms of a set of generators? Jim Stasheff jds@math.upenn.edu Home page: www.math.unc.edu/Faculty/jds As of July 1, 2002, I am Professor Emeritus at UNC and I will be visiting U Penn but for hard copy the relevant address is: 146 Woodland Dr Lansdale PA 19446 (215)822-6707 14-Oct-2004 16:44:14 -0300,1527;000000000000-00000000