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when toggle format what by license comment
Jan 30, 2022 at 4:32 history edited Martin Sleziak CC BY-SA 4.0
http -> https (the question has been bumped anyway)
Jan 13, 2012 at 13:17 history edited Lars CC BY-SA 3.0
added 1 characters in body
Feb 12, 2010 at 21:09 comment added Emerton Yes, sorry about this; I was copying the terminology of the earlier question that I linked to. I'm never sure what notation/terminology to use when discussing these various rings, since many non-arithmetic geometers don't know Berthelot's notation.
Feb 12, 2010 at 14:27 comment added Lars Oh, good, then we are talking about the same thing. I was confused because you wrote "divided power differential operators", which are D^(0) in Berthelots language (and PD-Diff in the language of his older writings on crystalline cohomology), if I understand correctly. The higher D^(n) are constructed via "partially-divided powers".
Feb 12, 2010 at 13:11 comment added Emerton By the full ring I mean Berthelot's ${\mathcal D}^{\infty}$, if I remember the notation correctly. Thank you for the references!
Feb 12, 2010 at 12:56 history answered Lars CC BY-SA 2.5