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Dec 18, 2020 at 19:58 comment added Piotr Achinger @AntoineDucros it seems that by van Kampen it suffices to treat the affine case?
Dec 18, 2020 at 10:04 comment added Antoine Ducros Thank you very much! The quasi-projectivity assumption in the ArXiv paper you refer to looks strange. I think it is probably not necessary?
Dec 16, 2020 at 23:36 comment added Will Chen The invariance of fundamental groups under extensions of alg. closed fields in char. 0 is discussed here. Since then Aaron Landesman has also written up a proof of the invariance here: arxiv.org/pdf/2005.09690.pdf
Dec 16, 2020 at 23:08 history edited LSpice CC BY-SA 4.0
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Dec 16, 2020 at 23:05 history edited YCor CC BY-SA 4.0
unabbreviated in title, added top-level tag
Dec 16, 2020 at 22:50 history asked Antoine Ducros CC BY-SA 4.0