Goldie Ranks of Primitive Ideals and Indexes of Equivariant Azumaya Algebras
Goldie Ranks of Primitive Ideals and Indexes of Equivariant Azumaya Algebras
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原理想Goldie秩和等变Azumaya代数指标
DOI:
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发表时间:
2018
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影响因子:
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通讯作者:
I. Panin
中科院分区:
文献类型:
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作者:
I. Losev;I. Panin
Let $\mathfrak{g}$ be a semisimple Lie algebra. We establish a new relation between the Goldie rank of a primitive ideal $\mathcal{J}\subset U(\mathfrak{g})$ and the dimension of the corresponding irreducible representation $V$ of an appropriate finite W-algebra. Namely, we show that $\operatorname{Grk}(\mathcal{J}) \leqslant \dim V/d_V$, where $d_V$ is the index of a suitable equivariant Azumaya algebra on a homogeneous space. We also compute $d_V$ in representation theoretic terms.