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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Oct 28, 2016 at 14:53 history edited Nautilus CC BY-SA 3.0
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Oct 28, 2016 at 14:43 comment added Nautilus Willie Wong, very elegant counterexample, thank you for posting the link.
Oct 26, 2016 at 15:58 comment added Oleg Eroshkin Are you familiar with Whitney extension theorem? I think it's answer this question completely.
Oct 26, 2016 at 13:07 comment added Willie Wong Your question is answered in the negative as part of the question statement of this question.
Oct 26, 2016 at 12:16 history asked Nautilus CC BY-SA 3.0