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I wish to define an operator, something like:

\DeclareMathOperator{\St}{\overline{St}}

It works partially, however the spacing between the operator and the next symbol disappears.

May I ask how to correct this? I tried doing:

\DeclareMathOperator{\St}{\mathop{\overline{St}}}

enclosing a \mathop as suggested in Why does \overline mess up the spacing?. However, it doesn't seem to work in this context.

Thanks for any help.

Update: Sorry, my bad, I put a curly bracket {\St} in my code, which causes the spacing to disappear. Removing the curly bracket solves the issue.

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  • @David There remains a spacing issue between the operator and a superscript. Commented Dec 18, 2017 at 19:09
  • @HeikoOberdiek there are any number of issues not mentioned in the question in code that isn't shown:-) But no matter now you've answered the close vote can be ignored (I'll delete the close comment) Commented Dec 18, 2017 at 19:12

1 Answer 1

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6

The subscript seems fine. But the superscript is pretty close to the line. The line can be shortened:

\documentclass{article} \usepackage{amsmath} \DeclareMathOperator{\StA}{\overline{St}} % Line shortened by \thinmuskip \DeclareMathOperator{\StC}{\overline{St\!}\,} % Line shortend by .5\thinmuskip \DeclareMathOperator{\StB}{% \overline{St\mskip-.5\thinmuskip}\mskip.5\thinmuskip } \begin{document} \[ \StA_{0}^{n}\; \StB_{0}^{n}\; \StC_{0}^{n} \] \end{document}

Result

The middle version \StB seems acceptable.

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