Weyl Modules for the Hyperspecial Current Algebra

Weyl Modules for the Hyperspecial Current Algebra
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超特殊电流代数的 Weyl 模块

DOI:
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发表时间:
2014
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通讯作者:
Deniz Kus
Deniz Kus
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作者:
Vyjayanthi Chari;B. Ion;Deniz Kus

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我们发展了超特殊极大抛物子代数$A_(2n)^{(2)}的整体和局部Weyl模理论。证明了局部Weyl模的维度只取决于它的最高权,从而建立了全局Weyl模的自由性结果。进一步,我们证明了分次局部Weyl模是相应仿射李代数的一级Demazure模。在最后一节中,我们对非A_(2n)型扭曲仿射李代数的特殊极大抛物子代数得到了同样的结果。
We develop the theory of global and local Weyl modules for the hyperspecial maximal parabolic subalgebra of type $A_{2n}^{(2)}$. We prove that the dimension of a local Weyl module depends only on its highest weight, thus establishing a freeness result for global Weyl modules. Furthermore, we show that the graded local Weyl modules are level one Demazure modules for the corresponding affine Lie algebra. In the last section we derive the same results for the special maximal parabolic subalgebras of the twisted affine Lie algebras not of type $A_{2n}^{(2)}$.