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Nov 18, 2018 at 3:37 comment added Sándor Kovács @VincenzoZaccaro: Both of those are stated and proved in the section on flatness in [Hartshorne].
Nov 17, 2018 at 16:39 comment added Vincenzo Zaccaro Very nice explanation! I know It's been a while but can you give me a reference for the first two claims?
Sep 13, 2011 at 17:49 comment added Mohammad Farajzadeh-Tehrani they pretty much cover all examples I need.
Sep 13, 2011 at 17:49 comment added Mohammad Farajzadeh-Tehrani these criteria are really helpful. thanks.
Sep 13, 2011 at 17:44 history edited Sándor Kovács CC BY-SA 3.0
added 23 characters in body
Sep 13, 2011 at 17:28 history answered Sándor Kovács CC BY-SA 3.0