Typesetting a variable which has both accent and subscript

Question

How to typeset a variable like:

A with hat and 0 as index

Whether do I write $\hat{A}\vphantom{A}_0$ or simply write $\hat{A}_0$ ? (I had seen the former in a template).

BTW, what about $f'^2$ ? Is $f^{\prime2}$ or $f^{\prime\,2}$ or ${f^{\prime}}^2$ or $f^{\prime}\vphantom{f}^2$ ?

Leo Liu · Accepted Answer · 2011-04-23 07:42:10Z

up vote 5 down vote accepted

Just $\hat{A}_0$ is OK. \vphantom is even harmful, for some letter like I.

answered Apr 23 '11 at 7:42

Leo Liu
35.7k279158

@L.L. What about $f'^2$ ? Is $f^{\prime2}$ or $f^{\prime\,2}$ or ${f^{\prime}}^2$ or $f^{\prime}\vphantom{f}^2$ ? – Stufazi Hoqckt Apr 23 '11 at 8:53

1

I think (f')^2 is better. – Leo Liu Apr 23 '11 at 15:55

1 Answer