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Apr 29, 2022 at 7:39 vote accept Carlos_Petterson
Apr 8, 2022 at 18:08 comment added Anton Petrunin @Carlos_Petterson, I guess it is about (3+1)-point comparison --- check our book arxiv.org/abs/1903.08539
Apr 8, 2022 at 17:33 comment added Carlos_Petterson May I ask you to add the details for this, I'm really not an expert in this type of argument :/
Apr 3, 2022 at 16:55 comment added Anton Petrunin By the way, if you apply (n+1)-point comparison you could get that distortion should be at least $\sqrt2-\varepsilon$ for large $R$. Most likely the bound should approach infinity, but I do not see an argument to prove it.
Apr 3, 2022 at 16:48 comment added Anton Petrunin Just apply the (3+1)-point comparison, you will get that for any $\varepsilon>0$ and all sufficiently large $R$ the map cannot be $[\sqrt3,2-\varepsilon]$-bilipschitz.
Apr 2, 2022 at 15:40 history answered Anton Petrunin CC BY-SA 4.0