## Ross Geoghegan

### Research Professor

### Background

I am interested in the interplay between group theory and geometry/topology. In particular: geometric and homological group theory, fixed point theory, and certain parts of dynamical systems. Some of the questions motivating this work are algebraic, involving the algebraic K-theory of rings associated with the fundamental group; this is how I got interested in Nielsen fixed point theory, particularly parametrized versions of that theory. Other questions are about how an action by a discrete group on a non-positively curved space can lead to group theoretic information. I'm also interested in understanding the asymptotic topological invariants of a group. I have recently finished a book on that subject called “Topological Methods in Group Theory”.

### Education

- BSc, MSc, University College, Dublin
- PhD, Cornell University

### Research Interests

- Topology
- geometric group theory
- fixed point theory
- dynamics

### Awards

- STAR Award for University Service