Supercharacters and combinatorial Hopf algebras May 17 to May 21, 2010 American Institute of Mathematics, Palo Alto, CA Organizers: Nantel Bergeron, Persi Diaconis, Jean-Yves Thibon, and Nathaniel Thiem Description: This workshop, sponsored by AIM and the NSF, will bring together experts in the emerging area of supercharacter theory and experts in Hopf algebras. Deadline: January 15, 2010 Details: http://aimath.org/ARCC/workshops/supercharacters.html