# Papers and Preprints

Most of these papers are also available from the arXiv, here.

Coarse differentiation of Quasi-isometries II:rigidity for Sol and Lamplighter groups,with A. Eskin and D. Fisher pdf.

Finiteness of arithmetic hyperbolic reflection groups, with I. Agol, M. Belolipetsky, and P. Storm pdf
in Groups, Geometry, and Dynamics 2 (2008) no 4..

Coarse differentiation of Quasi-isometries I:spaces not quasi-isometric to graphs,with A. Eskin and D. Fisher pdf to appear in Annals of Mathematics

A note on spaces of asymptotic dimension one, with K. Fujiwara pdf in Algebraic and Geometric Topology 7 (2007)

Quasi-isometries and rigidity of solvable groups, with A. Eskin and D. Fisher pdf in Pure and Applied Math Quarterly 3 (2007) no 4.

Quasi-Actions on Trees II: Bass-Serre trees, with L. Mosher and M. Sageev pdf to appear in Memoirs of the AMS

Non-ergodic actions, cocycles and superrigidity, with D. Fisher and D. Morris pdf, to appear in New York Mathematics Journal.

The large scale geometry of some metabelian groups, with J. Taback, pdf Michigan Journal of Mathematics 52 no 1, 2004

When is a group action determined by its orbits?, with D. Fisher, pdf, GAFA 13/6 Dec. 2003

Growth of Betti Numbers, with B. Clair, Topology 42/5 2003, dvi or pdf.

Maximally Symmetric Trees, with L. Mosher and M. Sageev. pdf, Geometriae Dedicata 92, 2002.

Quasi-actions on trees, I : Bounded valence, with L. Mosher and M. Sageev, Annals of Mathematics 158, 2003., in dvi or postscript

Continuous Quotients for Lattice Actions on Compact Manifolds, with D. Fisher, Geometriae Dedicata 87, 2001, dvi or postscript

The Quasi-Isometry Types of the Higher Baumslag-Solitar Groups, GAFA 11, 2001, dvi or postscript

Geometry of Groups with Infinitely Many Ends, with P. Papasoglu, Commentarii Mathematici Helvetici 77, 2002.dvi or postscript

The Uniformly Finite A-hat Genus, JDG 59, 2001,dvi or postscript

Amenability, Bilipschitz Equivalence, and the Von Neumann Conjecture, Duke Journal of Mathematics 1999, p. 93-112. dvi or postscript

My Thesis, University of Chicago 1998, dvi or postscript