T_n( cos(theta) ) = cos(n theta) where T_n is the nth Chebyshev polynomial of the first kind.
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Huh, thanks that's useful to know. It renders correctly in Chrome and Firefox on my laptop and in the Twitter app on my phone (android). Are they using non-standard/extended unicode? It's a shame http://unicodeit.net doesn't indicate when it's using non-standard characters
there's a wikipedia page that documents all the supported super/sub scripts .. Android actually uses html embedding for some of them .. so things that work on android actually aren't visible on other OS's
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Am I reading this wrong? Subscript-n seems to be in there: https://en.wikipedia.org/wiki/Superscripts_and_Subscripts_(Unicode_block) …
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you're right , it does appear in the Official Unicode Consortium code chart pdf, but on the wiki it doesn't render for me i *think* the subscript n is a new addition in Unicode Standard, Version 12.1 .. it could be that many systems have not updated yetpic.twitter.com/EEbwFaUodm
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