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May 23, 2018 at 14:39 comment added Pietro Majer A nice discussion on energy minimising maps between annuli is also in Struwe's book Variational Methods (especially about the Plateau boundary conditions)
Mar 29, 2018 at 14:03 comment added Piotr Hajlasz @AsafShachar If you fix boundary conditions for a mapping between annuli (as in the result above), then an immersion has to be a diffeomorphism. Am I right?
Mar 29, 2018 at 9:49 comment added Asaf Shachar Thanks, this is very interesting. This shows that the infimum of the energy over all homeomorphisms is not attained. I wonder whether this implies the infimum over immersions is also not attained.
Mar 28, 2018 at 21:24 history edited Piotr Hajlasz CC BY-SA 3.0
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Mar 26, 2018 at 19:15 history edited Piotr Hajlasz CC BY-SA 3.0
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Mar 26, 2018 at 15:26 history edited Piotr Hajlasz CC BY-SA 3.0
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Mar 26, 2018 at 15:07 history answered Piotr Hajlasz CC BY-SA 3.0