Preface PART 1 Group Actions on Manifolds 1. An Extension Criterion for Lattice Actions on the Circle Marc Burger 2. Meromorphic Almost Rigid Geometric Structures Sorin Dumitrescu 3. Harmonic Functions over Group Actions Renato Feres and Emily Ronshausen 4. Groups Acting on Manifolds: Around the Zimmer Program David Fisher 5. Can Lattices in SL (n, R) Act on the Circle? David Witte Morris 6. Some Remarks on Area-Preserving Actions of Lattices Pierre Py 7. Isometric Actions of Simple Groups and Transverse Structures: The Integrable Normal Case Raul Quiroga-Barranco 8.

Some Remarks Inspired by the C0 Zimmer Program Shmuel Weinberger PART 2 Analytic, Ergodic, and Measurable Group Theory 9. Calculus on Nilpotent Lie Groups Michael G. Cowling 10. A Survey of Measured Group Theory Alex Furman 11. On Relative Property (T) Alessandra Iozzi 12. Noncommutative Ergodic Theorems Anders Karlsson and François Ledrappier 13. Cocycle and Orbit Superrigidity for Lattices in SL (n, R) Acting on Homogeneous Spaces Sorin Popa and Stefaan Vaes PART 3 Geometric Group Theory 14. Heights on SL2 and Free Subgroups Emmanuel Breuillard 15.

Displacing Representations and Orbit Maps Thomas Delzant, Olivier Guichard, François Labourie, and Shahar Mozes 16. Problems on Automorphism Groups of Nonpositively Curved Polyhedral Complexes and Their Lattices Benson Farb, Chris Hruska, and Anne Thomas 17. The Geometry of Twisted Conjugacy Classes in Wreath Products Jennifer Taback and Peter Wong PART 4 Group Actions on Representations Varieties 18. Ergodicity of Mapping Class Group Actions on SU(2)-Character Varieties William M. Goldman and Eugene Z. Xia 19. Dynamics and Aut (Fn) Actions on Group Presentations and Representations Alexander Lubotzky List of Contributors.