Steinberg slices and group-valued moment maps
Steinberg slices and group-valued moment maps
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Steinberg 切片和群值矩图
DOI:
10.1016/j.aim.2022.108344
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发表时间:
2022
影响因子:
1.7
通讯作者:
Bălibanu, Ana
中科院分区:
文献类型:
--
作者:
Bălibanu, Ana
We define a class of transversal slices in spaces which are quasi-Poisson for the action of a complex semisimple group G. This is a multiplicative analogue of Whittaker reduction. One example is the multiplicative universal centralizer Z of G, which is equipped with the usual symplectic structure in this way. We construct a smooth relative compactification Z‾ by taking the closure of each centralizer fiber in the wonderful compactification of G. By realizing this relative compactification as a transversal in a larger quasi-Poisson variety, we show that it is smooth and log-symplectic.
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