Rational Catalan combinatorics December 17 to December 21, 2012 American Institute of Mathematics, Palo Alto, CA Organizers: Drew Armstrong, Stephen Griffeth, Victor Reiner, and Monica Vazirani Description: This workshop, sponsored by AIM and the NSF, will be devoted to understanding the interaction between new developments in algebra and combinatorics. In particular, it will focus on combinatorial objects counted by generalizations of Catalan numbers and their interaction with the representation theory of Cherednik algebras. Deadline: August 17, 2012 Details: http://www.aimath.org/ARCC/workshops/rationalcatalan.html