Resolutions of Proper Riemannian Lie Groupoids
Resolutions of Proper Riemannian Lie Groupoids
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原黎曼李群形的解析
DOI:
10.1093/imrn/rny292
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发表时间:
2019
影响因子:
1
通讯作者:
Wang, Kirsten
中科院分区:
文献类型:
--
作者:
Posthuma, Hessel;Tang, Xiang;Wang, Kirsten
In this paper we prove that every proper Lie groupoid admits a regularization to a regular proper Lie groupoid. When equipped with a Riemannian metric, we show that it admits regularization to a regular Riemannian proper Lie groupoid, arbitrarily close to the original one in the Gromov–Hausdorff distance between the quotient spaces. We construct the regularization via a successive blow-up construction on a proper Lie groupoid. We also prove that our construction of the regularization is invariant under Morita equivalence of groupoids, showing that it is a desingularization of the underlying differentiable stack.
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