Past topics

• Drew on normal form in amalgams and Britton's Lemma
• Ian on statement of Stallings Ends Theorem, and 2-ended case
• Teddy on graphs of groups
• Aaron on incompressible surfaces in 3-manifolds and dual trees
• Joe on Culler-Shalen tree actions from representation varieties
• Andrew on JSJ of a 3-manifold
• Kristen on JSJ of a group
• Zhexiu on hyperbolic spaces and groups
• Amin on proof of Stallings Ends Theorem (infinite ends)
• Chenxi on limits of actions on hyperbolic spaces and R-trees.
• Ian / Joe on Bestvina--Feighn "Stable actions of groups on real trees"
• Drew on Dunwoody's accessibility

Upcoming topics

• Kristen: Dunwoody's example of an inaccessible finitely generated group
• Chenxi: Bestvina-Feighn accessibility
• Zhexiu on splittings coming from virtually cyclic subgroups with e(G,H)>1 (application of JSJ theory)
• Aaron on seeing the JSJ of a hyperbolic group from the boundary (Bowditch).
• Teddy: different kinds of "stability" conditions for R-tree actions (Guirardel)
• Amin: Outer space.

Unclaimed topic suggestions

• Bestvina-Feighn accessibility
• (Talk to Ian/Joe first) Using Rips machine to classify groups acting freely on R-trees.
• Using Rips machine and JSJs to understand the outer automorphism group of a hyperbolic group.
• Sela's "shortening argument"