Matt T. Clay  Department of Mathematics University of Oklahoma Office: PHSC 1024 Phone: 405-325-0793 e-mail: mclay "at" math.ou.edu   Teaching Running OU Seminars: Geometric Group Theory Seminar Geometry and Topology Seminar Papers and Preprints: Growth of intersection numbers for free group automorphisms with Jason Behrstock and Mladen Bestvina .pdf .ps Morse theory and conjugacy classes of finite subgroups with Noel Brady and Pallavi Dani .pdf .ps Geom. Ded. 135 (2008), 15-22. On the isomorphism problem for generalized Baumslag-Solitar groups with Max Forester .pdf .ps Whitehead moves for G-trees with Max Forester .pdf .ps Deformation spaces of G-trees and automorphisms of Baumslag-Solitar groups .pdf .ps (to appear in Groups, Geometry and Dynamics) A fixed point theorem for deformation spaces of G-trees .pdf .ps Comm. Math. Helv. 82 (2007), 237-246. (an early version appeared as "A generalization of Culler's Theorem") Contractibility of deformation spaces of G-trees .pdf .ps Alg. and Geom. Topol. 5 (2005), 1481-1503.