Chevalley restriction theorem for vector-valued functions on quantum groups

Details Chevalley restriction theorem for vector-valued functions on quantum groups Chevalley restriction theorem for vector-valued functions on quantum groups

2010-04-02

arxiv.org/abs/1004.0371v2

Represent. Theory 15 (2011), 617-645

Mathematics

Quantum Algebra

Scientific paper

We generalize Chevalley's theorem about restriction of \mathfrak{g}-invariant polynomial functions \mathfrak{g}->C to W-invariant functions on the Cartan \mathfrak{h}->C. We consider the case when \mathfrak{g} is replaced by a quantum group and the target space of the polynomial maps is replaced by a finite dimensional representation V of this quantum group. We prove that the restriction map Res:(O_q(G)\otimes V)^{U_q(\mathfrak{g})}-> O(H)\otimes V is injective and describe the image.

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