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Aug 1 at 13:37 comment added Doug Liu See p.21 of "Universal Extensions and One Dimensional Crystalline Cohomology" by MAZUR and MESSING.
Jun 4, 2019 at 4:43 comment added naf The book "Commutative Group Schemes" by Oort, SLN 15, might contain what you ask.
Jun 3, 2019 at 17:09 history edited gzbghl CC BY-SA 4.0
deleted 1354 characters in body
S May 21, 2019 at 5:47 history suggested user64494 CC BY-SA 4.0
Typos in the title are corrected.
May 21, 2019 at 5:24 review Suggested edits
S May 21, 2019 at 5:47
May 20, 2019 at 21:55 review First posts
May 21, 2019 at 1:09
May 20, 2019 at 21:53 history asked gzbghl CC BY-SA 4.0