Functions on the commuting stack via Langlands duality
Functions on the commuting stack via Langlands duality
复制标题
通过朗兰兹对偶性实现通勤堆栈上的函数
DOI:
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发表时间:
2023
期刊:
影响因子:
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通讯作者:
Zhiwei Yun
中科院分区:
文献类型:
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作者:
Penghui Li;D. Nadler;Zhiwei Yun
We calculate the dg algebra of global functions on commuting stacks of complex reductive groups using tools from Betti Geometric Langlands. In particular, we prove that the ring of invariant functions on the commuting scheme is reduced. Our main technical results include: a semi-orthogonal decomposition of the cocenter of the affine Hecke category; and the calculation of endomorphisms of a Whittaker sheaf in a diagram organizing parabolic induction of character sheaves.