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How can I make the unicode integral symbol ∫ act as if it is followed by \limits? Classically \usepackage[intlimits]{amsmath} would do. But with unicode-math this does not help anymore. I also tried:

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{XITS Math}

\usepackage{newunicodechar}
\newunicodechar{∫}{∫\limits}

\begin{document}
    \[ ∫_a^b f(x) dx \]
\end{document}

But that seems to lead to an infinite recursion

! TeX capacity exceeded, sorry [input stack size=5000].
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1 Answer 1

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You can use the macros \removenolimits and \addnolimits to change the limits for specified operators.

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{XITS Math}

\let\limU\removenolimits  %limit position up
\let\limR\addnolimits     %limit position right

\begin{document}
Example
    \[ ∫_a^b f(x) dx \]
\limU{\int}
    \[ ∫_a^b f(x) dx \]
\limR{\int}
    \[ ∫_a^b f(x) dx \]
\end{document}

You'll have to swicht with \limU/R for each operator you want to change the limits position. (Tested with LuaLaTeX)

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  • 1
    Works also with XeLaTeX.
    – egreg
    Jul 31, 2012 at 14:38
  • How can I make this only apply for \displaystyle? I want to keep rightward limits for inline math, but have \limits on by default for all \displaystyle integrals…
    – Jollywatt
    Jan 15, 2022 at 3:30

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