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Dan M. Barbasch


Malott Hall, Room 543

Educational Background

  • Ph.D. (1976) University of Illinois



  • Mathematics

Graduate Fields

  • Mathematics


Representation theory of reductive Lie groups

My research is in the field of representation theory of reductive Lie groups. I am particularly interested in the classification of the unitary dual for groups over local fields, and its relation to the orbit structure of the Lie algebra. Furthermore I am interested in the relation of these representations to problems arising from number theory, more precisely automorphic forms.


  • Dirac index and twisted characters (with P. Pandzic and P. Trapa),, preprint.
  • Dirac cohomology for graded affine Hecke algebras (with D.Ciubotaru and P. Trapa), Acta Math. 209 (2012), no. 2, 197-227.
  • Spherical unitary dual for split real and p-adic groups, J. of the Mathematical Institute Jussieu, vol 9 (2010), issue 02, 265-356.
  • Reduction to real infinitesimal character in affine Hecke algebras (with A. Moy), Journal of the AMS 6 no. 3 (1993), 611-635.
  • The Langlands classification and irreducible characters (with J. Adams and D. Vogan), Birkhauser (1992), Boston-Basel-Berlin.
  • Unipotent representations for real reductive groups, Proceedings of ICM, Kyoto 1990 (1990), Springer-Verlag, Math. Soc. of Japan, 769-777.
  • The unitary dual of complex classical groups, Inv. Math. 96 (1989), 103-176.
  • Unipotent representations of complex classical groups (with D. Vogan), Ann. Math. 121 (1985), 41-110.