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# Questions

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### Examples of loss of regularity by “creation of topology”

feb 3 at 7:31 Filippo Alberto Edoardo 1,682512

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539
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### nontrivial $\pi_2(Diff(M))$

may 26 at 8:36 Mircea 937413

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### Geometric imagination of differential forms

jul 7 10 at 1:08 Suresh Venkat 2,687817

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### Are there good product rules on the $k$-sphere?

oct 1 10 at 0:54 Tom Goodwillie 26.8k260110

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### What would the best treatment of Gehring’s lemma look like?

jul 21 11 at 16:29 fedja 19.4k24694

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### Moser regularity proof avoiding John-Nirenberg lemma

mar 25 12 at 18:07 Connor Mooney 49116

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### Criterion for being a simple vector

apr 26 10 at 11:37 David Speyer 55.2k3102236

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471
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### criterion for being a curvature

dec 5 11 at 13:24 Robert Bryant 21.8k37597

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863
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### Defining the slowest divergent series

dec 24 11 at 1:05 Goldstern 5,26011227

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