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Apr 14, 2016 at 0:06 vote accept John Pardon
Apr 12, 2016 at 13:42 comment added Igor Belegradek It seems your argument is similar to pp.322-323 of Sullivan's "Infinitesimal computations in topology" where he discusses the kernel of the map that sends isotopy classes of diffeomorphisms to their homotopy classes. The link is archive.numdam.org/article/PMIHES_1977__47__269_0.pdf.
Apr 11, 2016 at 17:01 history edited Oscar Randal-Williams CC BY-SA 3.0
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Apr 11, 2016 at 16:51 history answered Oscar Randal-Williams CC BY-SA 3.0