The University of Michigan Combinatorics Seminar
Winter 2002
April 12, 4:10-5:00, 3866 East Hall

On the WZ method for combinatorial identities

Ira Gessel



The WZ (Wilf-Zeilberger) method is a very efficient way of finding proofs of binomial or hypergeometric identities. But there is much more to it than that. I will talk about two interesting aspects of the WZ method: a combinatorial interpretation that applies in some cases, and how the WZ method can be used to unify identities in a way that is more general than the traditional hypergeometric classification.