math
@Efi sin²(x) is usually the same as sin(x)² (and (sin(x))²).
When dealing with function/operators algebra, though, it's pretty common to have f²(x) mean f(f(x)), though.
(And yes, fuck this.)
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math
@kellerfuchs @Efi
though fⁿ(x) frequently means the nth derivative of f
math
@Efi @kellerfuchs there are ways of mapping functions (like the fourier transform) where you have to reason about arbitrary derivatives so they use a variable in that spot.
math
@kellerfuchs @Efi that's more clear. maybe i was taught a bad idiom
math
@confusedcharlot @Efi That's interesting, I've only seen f⁽ⁿ⁾(x) for that :O
*whines softly, is sads.*