Neo-Euler does not properly render text (uses math font instead).

[mforbes]

When using the Neo-Euler font, constructs like the following are problematic: the surrounding text font should be used in each of these cases:

• Operators: \sin
• Text boxes: \text{this is text} and \mathrm{this is also text}
• Equations tags: \tag{this is text too}

Here is what appears instead:

\int \mathrm{d}{x} \sin(x) = -\cos(x) + \mathrm{\text{h.c.}}  \tag{A simple identity}

This is what it should look like (output from LaTeX with surrounding Palatino font)

\documentclass{article}
\usepackage{mathpazo}
\usepackage[small]{eulervm}
\usepackage{amsmath}
\begin{document}
\begin{equation}
  \int \mathrm{d}{x} \sin(x) = -\cos(x) + \mathrm{\text{h.c.}}  \tag{A simple identity}
\end{equation}
\end{document}

[pkra]

This can be configured via mtextFontInherit, see http://docs.mathjax.org/en/latest/options/HTML-CSS.html

[mforbes]

Yes this works. Why is mtextFontInherit false by default? Sorry for the noise.

[pkra]

No problem. @dpvc will correct me but I think for the same reasons MathJax cannot support arbitrary fonts (see http://docs.mathjax.org/en/latest/font-support.html): the lack of bounding box information for arbitrary fonts means MathJax cannot ensure the layout is correct. I suspect this is less of a problem today than it was for v2.0 and in turn would only change at v3.0.

[mforbes]

Actually, there still seems to be a problem with operators like \sin and \ln (see below). I think that \mathrm{} for Neo-Euler is using the math font when it should also use the surrounding text font. \textrm{} works correctly as shown below in the h.c. and the tag. The d is still wrong (declared using \mathrm{d} as are the \sin and \cos.

[pkra]

I think that \mathrm{} for Neo-Euler is using the math font when it should also use the surrounding text font.

I think MathJax is replicating TeX/LaTeX behavior correctly here, i.e., it should be using the configured font in \mathrm.

Again, arbitrary fonts cannot be used with MathJax for lack of browser font APIs. At most, something like #1121 could help at some point.

[mforbes]

Where is \mathrm configured and how can I change that? Whatever it is, it is critical that it is not the same as the math font since \cos is not c*o*s. The eulervm package for sure inserts the text font for operators.

[mforbes]

@pkra Should I open this as a new issue? \mathrm should really not use the math font, even if it is upright as in Neo-Euler.