unicode-math and amsmath options

[eg9]

Description

unicode-math doesn't honor amsmath options such as intlimits

Check/indicate

• [x] Relevant for XeTeX
• [x] Relevant for LuaTeX
• [x] Issue tracker has been searched for similar issues?
• [x] https://tex.stackexchange.com/questions/457395/

Minimal example demonstrating the issue

\documentclass{article}
\usepackage[intlimits]{amsmath}
\usepackage{unicode-math}

\begin{document}
\[
\int_{a}^{b}
\]
\end{document}

Further details

amsmath takes its time in redefining every “big” operator so, for instance, \sum becomes \DOTSB\sum@\slimits@ and \int is \DOTSI\intop\ilimits@.

Already \DOTSB and \DOTSI are quite important, but the main issue is the lack of \slimits@ and \ilimits@ that the options nosumlimits or intlimits redefine from their standard value of \displaylimits and \nolimits respectively.

unicode has the \addnolimits and \removenolimits undocumented feature, but it is awkward to apply.

I'm not sure whether the \DOTSx feature can really be added (the problem I see is that \int is translated into ∫ U+222B made math active), but I believe that honoring amsmath options as regards to the placement of limits should.

[wspr]

Good catch. Yes, I agree this should be supported.

[urkud]

Same as #482. Maybe, one of the issues should be closed. This one has more details.

[davidcarlisle]

Related to this amsmath specifically detects the stix package and adjusts some definitions. If it also detected unicode-math some of the package load order issues might be easier to resolve. We could easily add such a test if that would be useful....

[wspr]

Some extra detail from Reinhard Kotucha:

when I load unicode-math after amsmath, the amsmath option intlimits has no effect any more. The options sumlimits and namelimits still work as expected.

 \documentclass{article}
 \usepackage[intlimits,sumlimits,namelimits]{amsmath}
 \usepackage{unicode-math}

 \begin{document}
   \[ \int_{0}^{1} \]
   \[ \sum_{i=0}^{1} \]
   \[ \lim_{x\to\infty} \]
 \end{document}

[hvoss49]

Is there any chance that this will be fixed??

[AlexaraWu]

https://github.com/wspr/unicode-math/blob/d28e48e46392516bae43bd9cb15660f7037e47ac/um-code-setchar.dtx#L171

Replace \nolimits by amsmath internal \ilimits@ should work?