Arithmetic harmonic analysis on character and quiver varieties June 4 to June 8, 2007 AIM Research Conference Center, Palo Alto, CA Organizers: Tamas Hausel, Emmanuel Letellier, and Fernando Rodriguez-Villegas Description: This workshop, sponsored by AIM and the NSF, will be devoted to bringing together mathematicians working on the following circle of ideas: cohomology of character and quiver varieties, representation theory of finite groups and algebras of Lie type, applications of the Weil conjectures to cohomological calculations, geometric representation theory of various finite and infinite dimensional algebras, and the combinatorics of Macdonald polynomials. Specific questions to be addressed during the workshop are described on the announcement page. Deadline: February 15, 2007 Details: http://aimath.org/ARCC/workshops/charvarieties.html