JProf Dr Maria Beatrice Pozzetti

    Office 5/229, 5th floor
    Mathematical Institute
    Heidelberg University
    Im Neuenheimer feld 205
    69120 Heidelberg

    Tel: +49-(0)6221-54 14050

 Email: pozzetti@mathi.uni-heidelberg.de

With the project Rigidity, deformations and limits of maximal representations I am part of the DFG priority program SPP 2026 Geometry at infinity

I am head of an Emmy-Noether research group on Discrete subgroups of semisimple Lie groups beyond Anosov

Group members:

  1. Gabriele Viaggi (Postdoc)
  2. Giulio Belletti (Postdoc)
  3. James Farre (Postdoc)
  4. Marta Magnani (PhD student)
  5. Colin Davalo (PhD student)
  6. Mareike Pfeil (PhD student, first supervisor Anna Wienhard)

Research interests: Discrete subgroups of semisimple Lie groups, Anosov and maximal representations, (complex) hyperbolic geometry, (Higher rank) Teichmüller-Thurston Theory, geometric group theory, bounded cohomology

Published/accepted papers:

  1. (with S. Maloni) Geometric limits of cyclic subgroups of SO(1, k+1) and SU(1, k+1)
    Preprint. Available online: arXiv:2008.11653 Accepted for publication Algebraic & Geometric Topology
  2. (with J. Beyrer) A collar lemma for partially hyperconvex surface group representations
    Preprint. Available online: arXiv:2004.03559 pdf Accepted for publication TAMS
  3. (with M. Burger, A. Iozzi, A. Parreau) The real spectrum compactification of character varieties: characterizations and applications
    Preprint. Available online: arXiv:2005.00120 pdf Accepted for publication Comptes Rendus - Serie Mathematique.
  4. (with A. Sambarino, A. Wienhard) Conformality for a robust class of non-conformal attractors
    Preprint. Available online: arXiv:1902.01303 pdf Accepted for pubblication J. Reine Angew. Math.
  5. (with F. Fanoni) Basmajian-type inequalities for maximal representations.
    Journal of Differential Geometry, Vol. 116, No. 3 (2020), pp. 405-458. pdf
  6. (with F. Franceschini, R. Frigerio, A. Sisto) The zero norm subspace of bounded cohomology of acylindrically hyperbolic groups.
    Commentarii Mathematici Helvetici 94-1 (2019), 89--139 pdf
  7. (with M. Burger) Maximal representations, non Archimedean Siegel spaces, and buildings
    Geometry & Topology 21-6 (2017), 3539--3599 pdf
  8. Boundary maps and maximal representations of complex hyperbolic lattices into SU(m,n).
    PhD Thesis, ETH Zurich pdf
  9. Maximal representations of complex hyperbolic lattices into SU(m, n).
    Geom. Funct. Anal. 25 (2015), no. 4, 1290–1332 pdf
  10. (with R. Frigerio, A. Sisto) Extending higher dimensional quasi-cocycles.
    J. Topol. 8 (2015), no. 4, 1123–1155 pdf
  11. (with M. Bucher, M. Burger, R. Frigerio, A. Iozzi, C. Pagliantini) Isometric properties of relative bounded cohomology.
    J. Topol. Anal. 6 (2014), no. 1, 1-25.pdf


  1. (with M. Burger, A. Iozzi, A. Parreau) Positive crossratios, barycenters, trees and applications to maximal representations
    Preprint. Available online: arXiv:2103.17161 pdf
  2. (with M.Bridgeman, A. Sambarino, A. Wienhard) Hessian of Hausdorff dimension on purely imaginary directions
    Preprint. Available online: arXiv:2010.16308 pdf
  3. (with A. Sambarino, A. Wienhard) Anosov representations with Lipschitz limit set
    Preprint. Available online: arXiv:1910.06627 pdf
  4. (with M. Burger, A. Iozzi, A. Parreau) Currents, Systoles, and Compactifications of Character Varieties
    Preprint. Available online: arXiv:1902.07680 pdf
  5. (with B. Duchesne, J. Lecureux) Boundary maps and maximal representations on infinite dimensional Hermitian symmetric spaces
    Preprint. Available online: arXiv:1810.10208 pdf
  6. (with O. Hamlet) Classification of tight homomorphisms
    Preprint. Available online: arXiv:1412.6398 pdf


  1. Higher rank Teichmüller theories Exposé 1161 in the Séminaire N. Bourbaki (Mars 2019)
  2. Compactifications via affine buildings Notes for the Workshop on compactifications of moduli spaces of representations
  3. Maximal representations Notes for the Workshop on Sp(4,R)-Anosov representations
  4. Maximal representations of complex hyperbolic lattices Oberwolfach reports 30 (2015)
  5. Bounded cohomology and the simplicial volume of the product of two surfaces Master Thesis (2011)


I am co-organizer of

Teaching in Heidelberg:

Past teaching:

Student supervision: