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Nov 4, 2019 at 20:50 comment added blakeoft I see now. I thought $u$ and $u^*$ were related, but they are in fact not.
Nov 4, 2019 at 20:38 comment added blakeoft In the wikipedia article, what does $u^*$ mean?
May 24, 2018 at 17:34 history answered meraxes CC BY-SA 4.0