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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Jan 20, 2013 at 19:12 history edited Angelo CC BY-SA 3.0
added 382 characters in body
Jan 20, 2013 at 17:57 comment added Jesko Hüttenhain Out of curiosity, though: Is there a "direct" proof for this equality, without identifying $c_n$ with the Euler characteristic?
Jan 20, 2013 at 14:05 vote accept Jesko Hüttenhain
Jan 20, 2013 at 14:05 comment added Jesko Hüttenhain Precisely what I had hoped for. Looking back now, I should have searched for "étale cover". Thanks a lot!
Jan 20, 2013 at 12:56 history answered Angelo CC BY-SA 3.0