Publications Please use publihsed pdf links when available. This will guarantee exact references.

• The Dixmier problem, lamplighters and Burnside groups, (with N. Ozawa)
  J. of Functional Analysis 258 No. 1 (2010), 255–259 | published pdf | preprint pdf | abstract.
  
  
• A lattice in more than two Kac–Moody groups is arithmetic, (with P.-E. Caprace)
  Israel Journal of Mathematics, to appear, 19 pages | pdf | abstract.
  
  
• Non-unitarisable representations and random forests, (with I. Epstein)
  IMRN 2009, 4336–4353 | published pdf | preprint pdf | abstract.
  
  
• Decomposing locally compact groups into simple pieces, (with P.-E. Caprace)
  preprint (2008), 19 pages | pdf | abstract.
  
  
• Isometry groups of non-positively curved spaces: discrete subgroups, (with P.-E. Caprace)
  Journal of Topology 2 No. 4 (2009), 701–746 | published pdf | preprint pdf | abstract.
  
  
• Isometry groups of non-positively curved spaces: structure theory, (with P.-E. Caprace)
  Journal of Topology 2 No. 4 (2009), 661–700 | published pdf | preprint pdf | abstract.
  
  
• On the bounded cohomology of semi-simple groups, S-arithmetic groups and products,
  Crelle's Journal 640 (2010), 33 pages | pdf | abstract.
  
  
• Product groups acting on manifolds, (with A. Furman)
  Duke Math. Journal 148 No. 1 (2009), 1–39 | published pdf | preprint pdf | abstract.
  
  
• Some properties of non-positively curved lattices, (with P.-E. Caprace)
  C. R. Acad. Sci. Paris, Ser. I 346 No. 15–16 (2008), 857–862 | published pdf | preprint pdf | abstract.
  
  
• Strong law of large numbers with concave moments, (with A. Karlsson)
  not for publication (2008), 2 pages | pdf | abstract.
  
  
• Bounds for cohomology classes, (with M. Burger, A. Iozzi and A. Wienhard)
  In: Guido's Book of conjectures, L'Enseignement Mathématique 54 (2008), 52–54 | pdf.
  
  
• Vanishing up to the rank in bounded cohomology,
  Math. Research Letters 14 No. 4 (2007), 681–687 | published pdf | preprint pdf | abstract.
  
  
• Property (T) and rigidity for actions on Banach spaces, (with U. Bader, A. Furman and T. Gelander)
  Acta Mathematica 198 No. 1 (2007), 57–105 | published pdf | preprint pdf | abstract.
  
  
• Orbit equivalence rigidity and bounded cohomology, (with Y. Shalom)
  Annals of Mathematics 164 No. 3 (2006), 825–878 | published pdf | preprint pdf | abstract.
  
  
• Superrigidity for irreducible lattices and geometric splitting,
  Journal Amer. Math. Soc. 19 No. 4 (2006), 781–814 | published pdf | preprint pdf | abstract.
  
  
• An invitation to bounded cohomology
  Proceedings of the ICM 2006, Volume II, 1183–1211 | published pdf | preprint pdf | abstract.
  
  
• Amenable actions, free products and a fixed point property, (with Y. Glasner)
  Bull. London Math. Soc. 39 No. 1 (2007), 138–150 | published pdf | preprint pdf | abstract.
  
  
• Boundedly generated groups with pseudocharacter(s), (with B. Rémy)
  [appendix to Manning's Quasi-actions on trees and Property (QFA)]
  J. London Math. Soc. 73 No. 1 (2006), 104–108 | published pdf | preprint pdf | abstract.
  
  
• Arithmeticity vs. non-linearity for irreducible lattices,
  Geom. Ded. 112 No. 1 (2005), 225–237 | published pdf | preprint pdf | abstract.
  
  
• Note on Superrigidity for irreducible lattices and geometric splitting,
  C. R. Acad. Sci. Paris, Ser. I 340 No. 3 (2005), 185–190 | published pdf | preprint pdf.
  
  
• Equivariant embeddings of trees into hyperbolic spaces, (with M. Burger and A. Iozzi)
  IMRN 22 (2005), 1331–1369 | published pdf | preprint pdf | abstract.
  
  
• Ideal bicombings for hyperbolic groups and applications, (with I. Mineyev and Y. Shalom)
  Topology 43 No. 6 (2004), 1319–1344 | published pdf | preprint pdf | abstract.
  
  
• Cocycle superrigidity and bounded cohomology for negatively curved spaces, (with Y. Shalom)
  J. Differential Geometry 67 No. 3 (2004), 395–455 | published pdf | preprint pdf | abstract.
  
  
• Stabilization for SL_n in bounded cohomology,
  [proceedings of the first JAMS Symposium, Matsushima 2002]
  Contemp. Math. 347 (2004), 191–202 | pdf | abstract.
  
  
• Negative curvature from a cohomological viewpoint, (with Y. Shalom)
  C. R. Acad. Sci. Paris, Ser. I 337 No. 10 (2003), 635–638 | published pdf | preprint pdf | abstract.
  
  
• On co-amenability for groups and von Neumann algebras, (with S. Popa)
  C. R. Acad. Sci. Canada 25 No. 3 (2003), 82–87 | pdf | abstract.
  
  
• On and around the bounded cohomology of SL₂, (with M. Burger)
  in: Rigidity in Dynamics and Geometry, 19–37, Springer 2002 | pdf | ps | abstract.
  
  
• Continuous bounded cohomology and applications to rigidity theory, (with M. Burger)
  Geom. Funct. Anal. 12 No. 2 (2002), 219–280 | published pdf | preprint pdf | abstract.
  
  
• Continuous bounded cohomology of locally compact groups,
  LNM vol. 1758 (Springer 2001) | published pdf | abstract.
  (Awarded the ETH Medal)
  
  
• Bounded cohomology of lattices in higher rank Lie groups, (with M. Burger)
  J. Eur. Math. Soc. 1 No. 2 (1999), 199–235 | published pdf | preprint pdf | abstract.
  
  
• Erratum to the above, (with M. Burger)
  J. Eur. Math. Soc. 1 No. 3 (1999), p. 338 | published pdf | preprint pdf.
  
  
• Éléments de géométrie grossière,
  M. Sc. memoir of the University of Lausanne (1997).
  
  

A Few Presentations

• Product groups acting on manifolds. A 2009 presentation about this paper.
  
• Rigidity, arithmeticity and splitting: an introduction. A 2007 presentation about this paper and that one.
  
• A dialogue between the cohomology of groups and their geometry. At the occasion of Beno Eckmann's 90th birthday.
  
• An invitation to bounded cohomology. ICM 2006 presentation; my full ICM paper is here.