• Margulis numbers and number fields. New preprint
  
  • pdf file

• Four-free groups and hyperbolic geometry (with Marc Culler)
  
  • arXiv version

• Volume and homology of one-cusped hyperbolic 3-manifolds (with Marc Culler)
  Algebr. Geom. Topol. 8 (2008), 343--379.
  • pdf file

• Hyperbolic volume and ranks of groups
  To appear in the Proceedings of the 2005 workshop on Heegaard splittings, Technion-IIT, Haifa, Israel
  Geometry and Topology Monographs
  • pdf file

• Singular surfaces, mod 2 homology, and hyperbolic volume, II (with Marc Culler)
  Submitted for publication
  • arXiv version

• Characteristic Subsurfaces, Character Varieties and Dehn Filling (with Steven Boyer, Marc Culler and Xingru Zhang)
  Submitted for publication
  • pdf file

• Singular surfaces, mod 2 homology, and hyperbolic volume, I (with Marc Culler)
  To appear in Trans. Amer. Math. Soc.
  • pdf file

• The diameter of the set of boundary slopes of a knot (with Ben Klaff),
  Algebraic & Geometric Topology 6 (2006), 1095-1112
  • Go for it

• Dehn surgery, homology and hyperbolic volume (with Ian Agol and Marc Culler)
  Algebraic & Geometric Topology 6 (2006), 2313-2350
  • pdf file

• Knots with only two strict essential surfaces (with Marc Culler)
  Proceedings of the Casson Fest (electronic)
  Geometry and Topology Monographs 7, Geom. Topol. Publ., Coventry, 2004, pp. 335--430
  • pdf file

• Characteristic subsurfaces and Dehn filling (with Steven Boyer, Marc Culler and Xingru Zhang)
  Trans. Amer. Math. Soc. 357 (2005), no. 6, 2389--2444
  • pdf file

• Real-analytic, volume-preserving actions of lattices on 4-manifolds (with Benson Farb)
  C. R. Math. Acad. Sci. Paris 334 (2002), no. 11, 1011--1014
  • pdf file

• Approximation by maximal cusps in boundaries of deformation spaces of Kleinian groups (with Richard D. Canary, Marc Culler and Sa'ar Hersonsky)
  J. Differential Geom. 64 (2003), no. 1, 57--109.
  • ps file
  • dvi file (no pictures)

• Three-manifold topology and the tree for PSL_2: The Smith conjecture and beyond
  Contemporary Mathematics 243 (1999), 189-209
  • dvi file
  • ps file

• Representations of 3-manifold groups
  Handbook of Geometric Topology
  R. Daverman and R. Sher, eds. North-Holland, Amsterdam, 2002, pp. 955--1044.
  • dvi file
  • ps file

• Groups of real-analytic diffeomorphisms of the circle
  (with Benson Farb)
  Ergodic Theory Dynam. Systems 22 (2002), no. 3, 835--844
  • dvi file of the paper

• Three-Manifolds and Baumslag-Solitar groups
  Topology Appl. 110 (2001), 113--118
  • dvi file

• Lattice actions, 3-manifolds, and homology
  (with Benson Farb)
  Topology 39 (2000), 573--587
  • dvi file of the paper
  • postscript file of the paper

• Boundary slopes of knots
  (with Marc Culler)
  Comm. Math. Helv. 74 (1999), 530-547
  • pdf file

• Homeomorphic graph-manifolds: a contribution to the \mu constant problem
  (with Bernard Perron )
  Topology Appl. 99 (1999), no. 1, 1--39.
  • dvi file

• Real-analytic actions of lattices
  (with Benson Farb)
  Invent. Math. 135 (1998), 273-296
  • dvi file of the paper
  • postscript file of the paper

• The First Betti Number of the Smallest Closed Hyperbolic 3-Manifold
  (with Marc Culler and Sa'ar Hersonsky)
  Topology 37 (1998), 805-849
  • dvi file of the preprint version of the paper (as permitted under the copyright agreement)
  • postscript file of the preprint

• Volumes of Hyperbolic Haken Manifolds, II
  (with Marc Culler)
  Proc. Amer. Math. Soc. 125 (1997), 3059-3067
  • dvi file

• Free Kleinian groups and volumes of hyperbolic 3-manifolds
  (with James W. Anderson, Marc Culler and Richard D. Canary)
  J. Diff. Geom (2) 43 (1996), 738-782
  • dvi file
  • figure 1, in gzipped postcript (hey, that rhymes)
  • figure 2, in...
  • figure 3
  • pdf file (no figures)

• Plane Curves Associated to Character Varieties of 3-Manifolds
  (with M. Culler, D. Cooper, H. Gillet, and D. D. Long)
  Invent. Math. 118 (1994), 47-84
  • dvi file of the paper
  • dvi file of the appendix
  • figure 1, in postscript

• Volumes of hyperbolic Haken manifolds, I
  (with Marc Culler)
  Invent. Math. 118 (1994), 284-329
  • dvi file
  • pdf file

• The Volume of a Hyperbolic 3-Manifold with Betti number 2
  (with Marc Culler)
  Proc. Amer. Math. Soc. 120 (1994), 1281-1288
  • dvi file
  • figure 1, in postscript
  • figure 2, in postscript
  • pdf file (without figures)

• Hyperbolic volume and mod p homology
  (with Marc Culler)
  Comm. Math. Helv. 68 (1993), 494-509
  • dvi file
  • pdf file

• Paradoxical decompositions, 2-generator Kleinian groups, and volumes of hyperbolic 3-manifolds
  (with Marc Culler)
  J. Amer. Math. Soc. 5 (1992), 231-288
  • dvi file
  • pdf file
  • figure1, in postscript

• Dendrology and its applications
  Group Theory from a Geometrical Viewpoint, ICTP, Trieste, Italy, 26 March-6 April, 1990.
  E. Ghys, A. Haefliger and A. Verjovsky, eds. World Scientific Publishing, 1991, 543--616
  • pdf file

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