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May 9, 2018 at 21:10 history edited John Klein CC BY-SA 4.0
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May 9, 2018 at 19:45 comment added John Klein @S.carmeli No I cannot give a differential geometric framework (I pointed that out in my post).
May 9, 2018 at 18:44 comment added S. carmeli Thank you for your answer. I guess this is the correct framework to state correctly my question, even thought I don't see how it answers it. Can you give differential-geometric property that ensures 2-flatness? I see now that the question is harder then I thought, since the construction of $G \mapsto G^\delta$ does not trivially generalize, it don't seem to naturally seat in a tower of finer operations. This makes me less optimistic, but still...
May 9, 2018 at 15:18 history edited John Klein CC BY-SA 4.0
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May 9, 2018 at 13:45 history edited John Klein CC BY-SA 4.0
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May 9, 2018 at 13:40 history edited John Klein CC BY-SA 4.0
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May 9, 2018 at 13:23 history undeleted John Klein
May 8, 2018 at 1:31 history deleted John Klein via Vote
May 8, 2018 at 1:27 history answered John Klein CC BY-SA 4.0