Sponsored by the Rutgers University Department of Mathematics and the

Center for Discrete Mathematics and Theoretical Computer Science (DIMACS)

**Co-organizers:****Drew Sills**, Rutgers University, asills {at} math [dot] rutgers [dot] edu**Doron Zeilberger**, Rutgers University, zeilberg {at} math [dot] rutgers [dot] edu

Title: Random walks and the lurking Riordan group

Speaker: **Lou Shapiro**, Howard University

Date: Thursday, April 27, 2006 5:00pm

Location: Hill Center, Room 705, Rutgers University, Busch Campus, Piscataway, NJ

Abstract:

The Riordan group is a simple concept which nonetheless provides a framework for investigating combinatorial structures and decomposing them into simpler components. The Riordan graoup also pops up in unexpected places. In this talk we will run through some of the basic definitions and examples, then go to some of the less usual settings, and also discuss several open problems. This talk is designed to be accessible to graduate students.