There are special macros for stuff like exp, sin, cos, etc... but not for the non-elementary special functions like F, J, I, K, E etc... although their symbold are quite standard throughout literature.
I know ISO/IEC 80000 standardized the use of mathematical constants as upright, along with greek letters and mathematical operators. I try to adhere to this, because frankly, it looks nicer overall.
Is there a similar standard for the math functions? Would it look weird if I made these upright as well?