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Jun 15, 2017 at 6:10 vote accept Randy
Jun 14, 2017 at 21:48 history edited YCor CC BY-SA 3.0
added 1 tag and improved language/typing
Jun 14, 2017 at 21:38 answer added Donu Arapura timeline score: 11
Jun 14, 2017 at 17:25 comment added Randy @DonuArapura Interesting! Many thanks. If you have the time, I would be very happy to see a bit of the details.
Jun 14, 2017 at 15:07 comment added Donu Arapura Yes, but I I don't have time to write a long answer right now. If $U$ is a so called Artin neighbourhood (= "bon voisinage" in SGA4, exp XI), then the fundamental group is free by free by free etc. This should be residually finite.
Jun 14, 2017 at 13:43 history asked Randy CC BY-SA 3.0