Abstract
The affine and degenerate affine Birman–Murakami–Wenzl (BMW) algebras arise naturally in the context of Schur–Weyl duality for orthogonal and symplectic quantum groups and Lie algebras, respectively. Cyclotomic BMW algebras, affine and cyclotomic Hecke algebras, and their degenerate versions are quotients of the affine and degenerate affine BMW algebras. In this paper, we explain how the affine and degenerate affine BMW algebras are tantalizers (tensor power centralizer algebras) by defining actions of the affine braid group and the degenerate affine braid algebra on tensor space and showing that, in important cases, these actions induce actions of the affine and degenerate affine BMW algebras. We then exploit the connection to quantum groups and Lie algebras to determine universal parameters for the affine and degenerate affine BMW algebras. Finally, we show that the universal parameters are central elements—the higher Casimir elements for orthogonal and symplectic enveloping algebras and quantum groups.
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Acknowledgments
Significant work on this paper was done while the authors were in residence at the Mathematical Sciences Research Institute (MSRI) in 2008. We thank MSRI for hospitality, support, and a wonderful working environment. We thank F. Goodman and A. Molev for their helpful comments and references. This research has been partially supported by the National Science Foundation DMS-0353038 and the Australian Research Council DP0986774 and DP120101942.
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Daugherty, Z., Ram, A. & Virk, R. Affine and degenerate affine BMW algebras: actions on tensor space. Sel. Math. New Ser. 19, 611–653 (2013). https://doi.org/10.1007/s00029-012-0105-3
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DOI: https://doi.org/10.1007/s00029-012-0105-3
Keywords
- Representation theory
- Schur–Weyl duality
- Braid groups
- Birman–Murakami–Wenzl algebras
- Casimir invariants