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Superscript of \sum cannot be rendered properly #2221

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memakura opened this issue Oct 18, 2019 · 6 comments
Closed

Superscript of \sum cannot be rendered properly #2221

memakura opened this issue Oct 18, 2019 · 6 comments
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Accepted Issue has been reproduced by MathJax team Fixed Test Needed v3.0
Milestone
MathJax v3.0.1

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@memakura
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When I use \sum_{i=1}^{n} x_i without other equations, it seems the superscript n cannot be rendered properly. (n becomes a subscript together with i=1.)
But when I use the equation with other symbol, such as \int_a^b, it works.

<!DOCTYPE html>
<html lang="en-US">
<head>
    <script async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js" id="MathJax-script"></script>
    <!-- <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.6/MathJax.js?config=TeX-AMS_CHTML"></script> -->
</head>
<body>

<p>When I use only this line, the superscript in \(\sum_{i=1}^{n} x_i\) does not work.</p>
<!-- <p>When I use only this line, the superscript in \(\sum_{i=1}^{n} x_i, \int_a^b\) works.</p> -->

<!-- <p>\(\int_a^b\) has no problem.</p> -->

</body>
</html>
@dpvc dpvc mentioned this issue Oct 19, 2019
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@dpvc dpvc added Accepted Issue has been reproduced by MathJax team Ready for Review Test Needed labels Oct 19, 2019
@dpvc
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dpvc commented Oct 19, 2019

I have made a pull request that resolves this problem.

dpvc added a commit to mathjax/MathJax-src that referenced this issue Nov 17, 2019
@dpvc
Merge pull request #369 from mathjax/issue2221
453d8f0 
Fix operator with movable limits when no other super- or subscripts are used.  mathjax/MathJax#2221
@dpvc dpvc added Merged Merged into develop branch and removed Ready for Review labels Nov 17, 2019
@YohnWang
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I have found that \prob has the same problem in inline math.
And wherever \int_a^b occur ,this problem will disappear.

@dpvc
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dpvc commented Nov 29, 2019

@YohnWang, yes, any operator will show the same issue. It is taken care of in the pull request listed above.

@dpvc dpvc added this to the MathJax v3.0.1 milestone Dec 31, 2019
@dpvc dpvc added Fixed v3.0 and removed Merged Merged into develop branch labels Feb 10, 2020
@dpvc dpvc closed this as completed Feb 10, 2020
@dependabot-preview dependabot-preview bot mentioned this issue Feb 10, 2020
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@snyk-bot snyk-bot mentioned this issue Apr 11, 2020
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@owlstead
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It still seems a problem on GitHub itself, probably due to using an older implementation. However, there seems to be a workaround: use \sum\limits_{i=0}^n i: $\sum\limits_{i=0}^n i$.

@dpvc
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dpvc commented Mar 17, 2023

@owlstead, the GitHub issue is a different cause: GitHub is filtering out attributes from the MathJax output and one of the attributes that it removes is critical to the proper placement of the summation sign, which is out of place when that attribute is removed by GitHub. They are using version 3.2.0, which is relatively recent, and does not have the bug reported here. The GitHub problem is a different cause.

@owlstead
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@dpvc Ah, yeah, wrong repo I guess, I found a further discussion here. Not sure why that isn't a bug report.

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Accepted Issue has been reproduced by MathJax team Fixed Test Needed v3.0
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@dpvc @owlstead @memakura @YohnWang