Affine PBW bases and affine MV polytopes

Affine PBW bases and affine MV polytopes
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DOI:
10.1007/s00029-018-0436-9
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发表时间:
2016-09
期刊:
Selecta Mathematica
影响因子:
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通讯作者:
D. Muthiah;P. Tingley
D. Muthiah;P. Tingley
中科院分区:
其他
文献类型:
--
作者:
D. Muthiah;P. Tingley

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我们展示了如何使用仿射PBW基来构造仿射MV多面体,并且所得到的对象与最近使用预射影代数或KLR代数构造的仿射MV多面体一致。为此,我们首先推广了Beck-Chari-Pressley和Beck-Nakajima的工作,定义了正根上任意凸阶的仿射PBW基。我们的结果描述了不同凸阶的仿射PBW基之间的关系,回答了Beck和Nakajima提出的一个问题。
We show how affine PBW bases can be used to construct affine MV polytopes, and that the resulting objects agree with the affine MV polytopes recently constructed using either preprojective algebras or KLR algebras. To do this we first generalize work of Beck–Chari–Pressley and Beck–Nakajima to define affine PBW bases for arbitrary convex orders on positive roots. Our results describe how affine PBW bases for different convex orders are related, answering a question posed by Beck and Nakajima.