Research output: Contribution to journal › Article

Journal | Representation Theory |
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Date | Published - 8 Sep 2011 |

Volume | 15 |

Number of pages | 29 |

Pages (from-to) | 617-645 |

Original language | English |

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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