Multiplets of representations, twisted Dirac operators and Vogan's conjecture in affine setting

Details Multiplets of representations, twisted Dirac operators and Vogan's conjecture in affine setting Multiplets of representations, twisted Dirac operators and Vogan's conjecture in affine setting

2007-04-25

arxiv.org/abs/0704.3342v3

Adv. Math. 217 (2008), no. 6, 2485--2562.

Mathematics

Representation Theory

Latex file, 89 pages. Several misprints corrected. To appear in Advances in Mathematics

Scientific paper

We extend classical results of Kostant and al. on multiplets of representations of finite-dimensional Lie algebras and on the cubic Dirac operator to the setting of affine Lie algebras and twisted affine cubic Dirac operator. We prove in this setting an analogue of Vogan's conjecture on infinitesimal characters of Harish-Chandra modules in terms of Dirac cohomology. For our calculations we use the machinery of Lie conformal and vertex algebras.

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