Dichotomy Amenable/Nonamenable in Combinatorial Group Theory October 8 to October 12, 2007 AIM Research Conference Center, Palo Alto, CA Organizers: Mark Sapir and Tatiana Nagnibeda Description: This workshop, sponsored by AIM and the NSF, will be devoted to various incarnations of the notion of amenability for a finitely generated group. The main goal of the workshop is to gain better understanding of the meaning of being amenable or nonamenable for a discrete, finitely generated group. Our attention will be concentrated on a certain number of concrete open problems about (non)amenability of groups with origins in very different areas of mathematics, as described on the workshop announcement page. Deadline: June 20, 2007 Details: http://aimath.org/ARCC/workshops/nonamenable.html