@St_Rev I have a math question, if you have time. In what sorts of situations do the solutions to equations lose derivatives? I think I understand why it happens wrt a sphere, but not well enough to generalize itpic.twitter.com/QH53LV8dyp
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The bit I was looking at starts a bit after 22:00https://youtu.be/iHKa8F-RsEM
"loses derivatives" seems to be a reference to https://en.wikipedia.org/wiki/Nash%E2%80%93Moser_theorem … (same wording is used) so...yeah, I got nothin'
So many terms of art, not a single place for me to grab hold
I'm really not impressed by the video, it's extremely French
It struck me as extremely French as well. I didn't think much of it, but it made me want to understand what he was talking about
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