Bad subscript spacing with `\mathchoice`

Question

I followed advice from here to add a symbol from MnSymbol to my document, and while the symbol appears the spacing is bad. In fact I have to use \mathchoice to get different integrals in text mode and in display mode, so I need \mathchoice but the spacing is bad. Here is the code:

\documentclass[12pt]{article}
\DeclareFontFamily{U} {MnSymbolF}{}
\DeclareFontShape{U}{MnSymbolF}{m}{n}{
  <-6> MnSymbolF5
  <6-7> MnSymbolF6
  <7-8> MnSymbolF7
  <8-9> MnSymbolF8
  <9-10> MnSymbolF9
  <10-12> MnSymbolF10
  <12-> MnSymbolF12}{}
\DeclareFontShape{U}{MnSymbolF}{b}{n}{
  <-6> MnSymbolF-Bold5
  <6-7> MnSymbolF-Bold6
  <7-8> MnSymbolF-Bold7
  <8-9> MnSymbolF-Bold8
  <9-10> MnSymbolF-Bold9
  <10-12> MnSymbolF-Bold10
  <12-> MnSymbolF-Bold12}{}
\DeclareSymbolFont{MnSyF} {U} {MnSymbolF}{m}{n}
\DeclareMathSymbol{\tstrokedint}{\mathbin}{MnSyF}{"60}
\DeclareMathSymbol{\dstrokedint}{\mathbin}{MnSyF}{"61}
\def\strokedint{\mathchoice{\dstrokedint}{\tstrokedint}{\tstrokedint}{\tstrokedint}}
\begin{document}
$\strokedint_D$ $\tstrokedint_D$ $\dstrokedint_D$
$$\strokedint_D$$
\end{document}

and here is the output:

The red arrows show the bad spacing (with \mathchoice) and the green arrows show the correct spacing (accessing the symbol directly, without \mathchoice).

Does somebody know how to have both \mathchoice and correct spacing?

score 1 · Accepted Answer · answered May 24 '23 at 23:24

1

If you declare it as \mathop the larger size will be found via the font metrics and you don't need \mathchoice

\documentclass[12pt]{article}
\DeclareFontFamily{U} {MnSymbolF}{}
\DeclareFontShape{U}{MnSymbolF}{m}{n}{
  <-6> MnSymbolF5
  <6-7> MnSymbolF6
  <7-8> MnSymbolF7
  <8-9> MnSymbolF8
  <9-10> MnSymbolF9
  <10-12> MnSymbolF10
  <12-> MnSymbolF12}{}
\DeclareFontShape{U}{MnSymbolF}{b}{n}{
  <-6> MnSymbolF-Bold5
  <6-7> MnSymbolF-Bold6
  <7-8> MnSymbolF-Bold7
  <8-9> MnSymbolF-Bold8
  <9-10> MnSymbolF-Bold9
  <10-12> MnSymbolF-Bold10
  <12-> MnSymbolF-Bold12}{}
\DeclareSymbolFont{MnSyF} {U} {MnSymbolF}{m}{n}
\DeclareMathSymbol{\strokedintop}{\mathop}{MnSyF}{"60}
\def\strokedint{\strokedintop\nolimits}
\begin{document}
$\strokedint_D$ $\strokedint_D$ $\displaystyle\strokedint_D$
$$\strokedint_D$$
\end{document}

answered May 24 '23 at 23:24

David Carlisle

757,742

See Why is \[ … \] preferable to $$? :) – Werner May 24 '23 at 23:40
1

yes but I decided to concentrate on the issue at hand, that post does have an excellent answer though:-) – David Carlisle May 24 '23 at 23:49
Thank you so much David, for the $\infty$-th time! Does this macro presuppose that the display-stye size comes directly after the text-style size? – yannis May 25 '23 at 07:52
@yannis no it's like ligatures or \left\right delimiters, the tex side has no knowledge a different glyph is used, they are chained together in the tfm tables, so the second glyph can be anywhere in the encoding – David Carlisle May 25 '23 at 07:56
Thanks. Shame on me, the information is in my book, page 626. But that was 20 years ago… – yannis May 25 '23 at 09:00

Bad subscript spacing with `\mathchoice`

1 Answers1