Loop group actions on categories and Whittaker invariants
Loop group actions on categories and Whittaker invariants
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对类别和 Whittaker 不变量进行循环组操作
DOI:
10.1016/j.aim.2017.10.024
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发表时间:
2017
影响因子:
1.7
通讯作者:
Beraldo D
中科院分区:
文献类型:
--
作者:
Beraldo D
The present paper is divided in three parts. In the first one, we develop the theory of D-modules on ind-schemes of pro-finite type. This allows to define D-modules on (algebraic) loop groups and, consequently, the notion of strong loop group action on a DG category. In the second part, we construct the functors of Whittaker invariants and Whittaker coinvariants, which take as input a DG category acted on by G ((t)), the loop group of a reductive group G. Roughly speaking, the Whittaker invariant category of C is the full subcategory C N ((t)), χ⊆ C consisting of objects that are N ((t))-invariant against a fixed non-degenerate character χ: N ((t))→ G a of conductor zero.(Here N is the maximal unipotent subgroup of G.) The Whittaker coinvariant category C N ((t)), χ is defined by a dual construction. In the third part, we construct a functor Θ: C N ((t)), χ→ C N ((t)), χ, which depends on a choice of dimension theory for G ((t)). We conjecture this functor to be an equivalence. After developing the Fourier–Deligne transform for Tate vector spaces, we prove this conjecture for G= G L n. We show that both Whittaker categories can be obtained by taking invariants of C with respect to a very explicit pro-unipotent group subscheme (not indscheme!) of G ((t)).
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
E. Frenkel;D. Gaitsgory
通讯作者:
D. Gaitsgory
DOI:
--
发表时间:
2013
期刊:
Astérisque
影响因子:
--
作者:
D. Gaitsgory
通讯作者:
D. Gaitsgory
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
D. Gaitsgory
通讯作者:
D. Gaitsgory
影响因子:
3.1
作者:
D. Gaitsgory
通讯作者:
D. Gaitsgory
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
D. Gaitsgory;N. Rozenblyum
通讯作者:
N. Rozenblyum