Abstract
Let A and B be two unipotent elements of
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 11871202
Award Identifier / Grant number: 12271148
Funding statement: This work was supported by the National Natural Science Foundation of China (Grants No. 11871202, No. 12271148).
Acknowledgements
We would like to thank the anonymous referee, whose insightful suggestions helped improving earlier versions of the manuscript. We thank Wei Liao and Mengqi Yu for several useful discussions.
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