It takes a lot of people to make a winning team. Everybody's contribution is important.

# Shane O'Rourke Profile

My area of research is geometric group theory, particularly group actions on treelike objects. Some resources:

- Brian Bowditch's course
- Clara Löh's course
- Jon McCammond's Geometric Group Theory page and especially his
- List of people in Geometric Group Theory.

### Some papers

- Some free actions on non-archimedean trees Journal of Group Theory (2004), 275-286. (with A. Martino)
- Free actions on Z^n-trees: a survey Contemp. Math. 372 (2005) 11-25. (with A. Martino)
- The equation x^py^q=z^r and groups that act freely on Lambda-trees Trans. Amer. Math. Soc. 361 (2009), no. 1, 223-236 (with N. Brady, L. Ciobanu and A. Martino)
- Affine actions on non-archimedean trees To appear in Int. J. Alg. and Comput.
- Free affine actions on linear Lambda-trees In preparation. The link is to a recent talk in the Group Theory International Webinar on this subject.
- A tree-free group that is not orderable Accepted by Proc. Amer. Math. Soc.