Hecke operators act on the cohomology of locally symmetric spaces for SL(n,R), and the Hecke eigenvalues are important in number theory and automorphic forms. When n = 2, the case of classical modular forms, modular symbols (due to Manin) give an algorithm for computing the Hecke operators. Ash

# Algebraic Topology Seminar

For more information on this seminar, contact William Browder or Tony Bahri (Rider).

**Please click on seminar title for complete abstract.**

##### An Algorithm for Hecke Operators

Princeton University

##### TBA - Don Davis

Lehigh University

##### On some Poisson aspects of moduli stack of Chen connections

The study of the Poisson geometry of the Teichmuller space and the moduli space of local systems gave rise to the discovery of the Goldman bracket of curves on a surface which in turn led Chas and Sullivan to discover string topology operations on chains on the free loop space of

LIU and CUNY

##### TBA - Boris Botvinnik

**This is a joint Algebraic Topology / Topology seminar. **

University of Oregon

##### TBA - Boris Botvinnik

**This is a joint Topology / Algebraic Topology seminar.**

University of Oregon