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Jul 13, 2018 at 19:55 vote accept Yasha Berchenko-Kogan
May 6, 2018 at 19:00 comment added Piotr Hajlasz @ChristianRemling In fact the question has a positive answer for maps in $W^{1,n}(B^n,S^{n-1})$, see my answer below.
May 6, 2018 at 2:44 answer added Piotr Hajlasz timeline score: 4
Feb 21, 2017 at 9:15 answer added Denis Serre timeline score: 1
Feb 20, 2017 at 20:59 answer added Mizar timeline score: 0
Feb 14, 2017 at 2:08 comment added Christian Remling By the way, continuous or not, $H^{1/2}$ functions on the unit circle always have a well defined degree, as I learned recently in the context of this MO question: mathoverflow.net/questions/255343/…
Feb 14, 2017 at 1:51 history edited YCor
edited tags
Feb 11, 2017 at 17:07 history edited Yasha Berchenko-Kogan CC BY-SA 3.0
added $e^{i\theta}$ example
Feb 11, 2017 at 17:05 answer added Yasha Berchenko-Kogan timeline score: 2
Feb 10, 2017 at 23:34 history asked Yasha Berchenko-Kogan CC BY-SA 3.0