Latex math within \text within math causes parser to fail

[matthew-brett]

Converting the following latex doc:

\begin{document}

Some text

$$
X^2 = \sum_{ij} \frac{(Y_{ij}-E_{ij})^2}{E_{ij}} \approx \chi^2_{(k-1)(m-1)} \
\text{under $H_0$}
$$

More text

$$
G = 2\sum_{ij} Y_{ij} \log \left(\frac{Y_{ij}}{E_{ij}}\right)
$$

\end{document}

causes the parser to give incorrect results to (e.g.) markdown (but also the json format):

Some text

$$ X^2^ = ~ij~ ^2^~(k-1)(m-1)~ $$More text$$ G = 2~ij~ Y~ij~ () $$

I think this is due to the \text{under $H_0$} math-within-math, because editing this part of the doc to \text{under H_0} gives the correct output:

Some text

$$X^2 = \sum_{ij} \frac{(Y_{ij}-E_{ij})^2}{E_{ij}} \approx \chi^2_{(k-1)(m-1)} \ \text{under H_0}$$

More text

$$G = 2\sum_{ij} Y_{ij} \log \left(\frac{Y_{ij}}{E_{ij}}\right)$$

[jgm]

It's a known isssue. See
jgm/texmath#13

+++ Matthew Brett [Feb 26 14 17:36 ]:

Converting the following latex doc:
\begin{document}

Some text

$$ X^2 = \sum_{ij} \frac{(Y_{ij}-E_{ij})^2}{E_{ij}} \approx \chi^2_{(k-1)(m-1)} \text{under $H_0$} $$

More text

$$ G = 2\sum_{ij} Y_{ij} \log \left(\frac{Y_{ij}}{E_{ij}}\right) $$

\end{document}

causes the parser to give incorrect results to (e.g.) markdown (but
also the json format):
Some text

$$ X^2^ = ij ^2^(k-1)(m-1) $$More text$$ G = 2ij Yij () $$

I think this is due to the \text{under $H_0$} math-within-math, because
editing this part of the doc to \text{under H_0} gives the correct
output:
Some text

$$X^2 = \sum_{ij} \frac{(Y_{ij}-E_{ij})^2}{E_{ij}} \approx \chi^2_{(k-1)(m-1)} \text{under H_0}$$

More text

$$G = 2\sum_{ij} Y_{ij} \log \left(\frac{Y_{ij}}{E_{ij}}\right)$$

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References

1. Latex math within \text within math causes parser to fail #1178

[matthew-brett]

Thought it might be but couldn't find it by searching - thanks.

[jgm]

Moving to jgm/texmath#62. Closing this issue.