This question already has an answer here:
I tried to work with Conjugates in Mathematica and it did not produce my desired result. I learned about assumptions and figured they're my way to go. This is the code:
Assuming[Element[a, Reals] && Element[e, Reals] && Element[m, Reals] && Element[r, Reals] && e > 0 && r > 0 && m > 0, Conjugate[(a E^(-I Sqrt Sqrt[e m] r))/r]]
However, this is the output:
(E^(I Sqrt Conjugate[Sqrt[e m] r]) Conjugate[a])/Conjugate[r]
Since all variables are real and positive, I'd expect only the sign in the exponent to flip. Why does it still want to conjugate real positive variables?