Dear Category Theorists, a preprint of my Nice-PSSL talk on "Derived semidistributive lattices" is now available through arXiv: http://arxiv.org/abs/0708.1695 Any of your comment will be very much appreciated. Best wishes, Luigi -- Luigi Santocanale LIF/CMI Marseille Tél: 04 91 11 35 74 http://www.cmi.univ-mrs.fr/~lsantoca/ Fax: 04 91 11 36 02