How to put a text over symbols, part 2

Question

Building on How do I put text over symbols? I created a new command :

\newcommand{\myequ}[1]{\stackrel{\mathclap{\normalfont\mbox{#1}}}{=}}

which gives overwriting :

when #1 is too long. Is there a way to tweak the new command so that it could take the length of #1 into account automatically ?

Steven B. Segletes · Accepted Answer · 2019-11-01T13:27:26.840

3

Remove the \mathclap, whose very purpose is to hide the width of its argument.

\documentclass{article}
\usepackage{mathtools}
\newcommand{\myequ}[1]{\stackrel{\normalfont\mbox{#1}}{=}}
\begin{document}
\[
y \myequ{eq.(3.3.44)} \int_\Omega x\,dx
\]
\end{document}

You may also wish to consider using \small or \scriptsize in preference to \normalfont.

Thanks to Bernard for reminding me of \eqmakebox, which can help for cases where align is involved:

\documentclass{article}
\usepackage{mathtools,eqparbox}
\newcommand{\myequ}[1]{\stackrel{\scriptsize\mbox{#1}}{=}}
\begin{document}
\begin{align}
y \eqmakebox[][c]{$\myequ{eq.(3.3.44)}$}& \int_\Omega x\,dx\\
z_1 \eqmakebox[][c]{$\myequ{eq.(576)}$}& \int_\Omega x^{(2+ 3x)}\,dx
\end{align}
\end{document}

edited Nov 01 '19 at 13:27

answered Nov 01 '19 at 11:28

Steven B. Segletes

237,551

2

Good point about char sizing, I did it in the meantime – Olórin Nov 01 '19 at 11:59
One last bit though : this does mix super well with alignment. Is there a priviledge solution for that ? ("=" symbols won't aligned if two distrinct #1's have different lenghts – Olórin Nov 01 '19 at 12:06
@ujsgeyrr1f0d0d0r0h1h0j0j_juj You are correct that align structures will be affected. – Steven B. Segletes Nov 01 '19 at 12:23
You can nest the = in an \eqmakebox (from eqparbox) to maintain the alignment. – Bernard Nov 01 '19 at 13:11
@Bernard Thank you. I seemed to recall that such a thing existed, but had never used it nor could I recall its name. – Steven B. Segletes Nov 01 '19 at 13:27
@ujsgeyrr1f0d0d0r0h1h0j0j_juj Thanks to suggestion of Bernard, the align case can be addressed. – Steven B. Segletes Nov 01 '19 at 13:28

How to put a text over symbols, part 2

1 Answers1