# Integral limits with amsmath in LuaLaTeX

Also reading the thread about Making integral ∫ use \limits by default with unicode-math I'm not quite happy with the solution. With pdfLaTeX I use the code

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[intlimits]{amsmath}
\begin{document}
$A=\int_0^{b}f(x)\mathrm{d}x$
\end{document}


and get

Compiling the code

\documentclass{article}
\usepackage[intlimits]{amsmath}
\usepackage{fontspec,unicode-math}
\setmainfont{Latin Modern Roman}
\setmathfont{Latin Modern Math}
\begin{document}
$A=\int_0^{b}f(x)\mathrm{d}x$
\end{document}


with LuaLaTeX I get

Is there any possibility—beside the solution in the linked question—to get the same output with both pdfLaTeX and LuaLaTeX?

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unicode-math uses a different model for deciding whether to put limits over or beside integrals and the intlimits option does nothing.

\documentclass{article}
\usepackage{amsmath}
\usepackage{fontspec,unicode-math}
\setmainfont{Latin Modern Roman}
\setmathfont{Latin Modern Math}

\removenolimits{\int}

\begin{document}
$A=\int_0^{b}f(x)\,\mathrm{d}x$
\end{document}


The list of operators defined with an implied \nolimits is the following:

\int\iint\iiint\iiiint\oint\oiint\oiiint
\intclockwise\varointclockwise\ointctrclockwise\sumint
\intbar\intBar\fint\cirfnint\awint\rppolint
\scpolint\npolint\pointint\sqint\intlarhk\intx
\intcap\intcup\upint\lowint


You can remove items from the list (one at a time) with the \removenolimits command; there's also \addnolimits for adding to the list.

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Thank you @egreg. When I typeset your code, the limits of the integral are not exactly possitioned like your picture shows but some points moved to the right. Do you know, why this happens? –  Stephan Lukasczyk Mar 23 '13 at 15:41
@StephanLukasczyk You're right: I used XeLaTeX for typesetting the example. With LuaLaTeX there's a shift, which seems like a bug somewhere. –  egreg Mar 23 '13 at 15:44
@egreg: it is probably the difference in calculating the integral width due to the bug in applying italic corrections to integrals in LuaTeX. –  Khaled Hosny Mar 23 '13 at 16:08