[Tex/LaTex] Alleged Missing Characters in Latin Modern Math

fontslatin-modernunicode-math

I'm using the Unicode-math package, with Latin Modern Math as my math font. Thus

\documentclass[]{article}

\usepackage{unicode-math}
\setmainfont{Latin Modern Roman}
\setmathfont{Latin Modern Math}

\begin{document}
The function $x \mapsto 2x$. But $A \Rightarrow B$, and $C \Longrightarrow D$.
\end{document}

In the output (produced by XeTeX), the \RightArrow is present, but the \mapsto and \Longrightarrow are missing. I get a warning message saying:

** WARNING ** Invalid CMap mapping entry. (ignored)

and also this in the log file:

Requested font "Latin Modern Math/OT:script=math;language=DFLT;+ssty=1;" at 4.99992pt
-> C:/Windows/Fonts/LMMATH-v0903.otf
Missing character: There is no ↦ in font LMMath-Regular/OT:script=math;language=DFLT;!
Missing character: There is no ? in font LMMath-Regular/OT:script=math;language=DFLT;!

The allegedly missing characters certainly are included in Latin Modern Math. I can see them in Windows Character Map and in FontForge, for example.

Anyone know what's going wrong??

Best Answer

From the .log file:

C:/Windows/Fonts/LMMATH-v0903.otf

Thus it seems that you are using a very very old version (0.903) of Latin Modern Math. The current version is 1.958. With the latter version I get all the math characters of the MWE both with luaTeX and XeTeX.

If the TeX installation is out of date, update it. Also you might want to remove the old version from the Windows font system directory to prevent XeTeX from finding and using the outdated version. If you need the font outside the TeX world, then install an updated font there.

Related Solutions

[Tex/LaTex] ‘Not element of’ in Latin Modern

After last Khaled's comment, here's something that seems to work

\Umathchardef\xnot="3 \symoperators "0338
\AtBeginDocument{
  \renewcommand\not[1]{#1\xnot}
  \renewcommand{\notin}{\not\in}
}

Then

$a\not\in b \notin c$

will work (although the placement doesn't seem to be optimal).

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

\Umathchardef\xnot="3 \symoperators "0338
\AtBeginDocument{\renewcommand\not[1]{#1\xnot}
\renewcommand{\notin}{\in\xnot}}

\begin{document}

$a \not\in S_{\not\in}$

$a\in\xnot b \notin c$

$a\in b \in c$

\end{document}

enter image description here

A possible improvement is to say

\Umathchardef\xnot="3 \symoperators "0338
\AtBeginDocument{
  \renewcommand\not[1]{#1\mathrel{\mkern1mu}\xnot}
  \renewcommand{\notin}{\not\in}
}

that pushes the slash slightly to the right, so that the upper end is lined up with the terminators of the \in symbol.

enter image description here

Note: this definitely doesn't work with XITS Math or Asana Math, which, however, have the proper symbol.

UPDATE

As of January 2013, the problem seems to be solved; here's the minimal example:

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

\begin{document}

$a \not\in S_{\not\in}$

$a \notin S_{\notin}$

\end{document}

enter image description here

Both LuaLaTeX and XeLaTeX give the correct result.

FURTHER UPDATES

The code was broken again, but version 0.8j of unicode-math seems to have fixed the issues.

[Tex/LaTex] Latin Modern Math in LaTeX

First a side remark: With xelatex you should never load inputenc (you did it in your example).

Beside this: Theoretically it is possible to use symbols from an open type font in pdftex. But you need to create a tfm-file, you need to create enc-file(s) and a map-entry. And as pdftex can't subset open type you probably also need to split the open type and create various type1 fonts. This means a lot of work - and imho all this new files will count as "strange packages" and so your publisher will not like it. If you really don't want to use any other package you could perhaps cheat like this:

\documentclass{article}
\usepackage{lmodern}
\begin{document}
$\lbrack\!\lbrack x \rbrack\!\rbrack$
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] ‘Not element of’ in Latin Modern

UPDATE

FURTHER UPDATES

[Tex/LaTex] Latin Modern Math in LaTeX

Related Question