# LuaLaTeX + load one particular math symbol from an OTF file

I try to load exactly one symbol from an OpenType Font file and use it in a math environment. However, it seems to me, that I can only use the symbol in "normal" text but not in math mode. Here is a minimal example:

\documentclass{article}

\usepackage{fontspec}
\usepackage{unicode-math}

\setmainfont{Latin Modern Roman}
\setmathfont{Latin Modern Math}
\newfontfamily\foo{Untitled1.otf}

\newcommand{\foobar}{\foo\symbol{1}}

\begin{document}
\foobar
$x \foobar y$
\end{document}

In normal text the symbol appears but in math mode it does not. Do I have to use some special command to load a symbol for a math environment?

Or the other way arround. How could I typeset a formula where the first part of the formula is typed in font A and the second part in font B (where A != B)?

Update

The question aims at the following problem. I created a new symbol which is not known to be available in Unicode. Therefore I created a new one and saved in the file Untitled1.otf. Now I want to load this symbol into my document and use it in math formulas. Since the symbol is not known in unicode I cannot use a "standard" symbol to refer to it. Therefore, I thought to use a command and reference the symbol by its index of the OTF file.

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Would it be an option to create a PDF with the symbol and say something like \newcommand{\foobar}{\includegraphics{mysymbol}}? – egreg Mar 31 '12 at 13:35

Just for one symbol, it's probably not worth going through the math setup, just define it as

\newcommand{\foobar}{\text{\foo\symbol{1}}}


so it'll work in math mode using the text font setup. (If you need it to get smaller in subscripts, load amsmath which will define \text to do that).

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in this example the first 1 is taken from Latin modern math and all the other from XITS Math:

\documentclass{article}
\usepackage{unicode-math}

\setmainfont{Latin Modern Roman}
\setmathfont{XITS Math}

\begin{document}
{\setmathfont[range="0031]{Latin Modern Math}
$x 1 y$ }
$x 1 y$
\end{document}


another example:

\documentclass{article}
\usepackage{unicode-math}

\setmainfont{Latin Modern Roman}
\setmathfont[version=XITS]{XITS Math}
\setmathfont[version=LMM]{Latin Modern Math}
\begin{document}
\mathversion{XITS}
$x \mbox{\mathversion{LMM}1} y$
$x 1 y$
\end{document}

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But how do you then typeset a formula where you want the number 1 typeset one time in Latin Modern Math and the other time in XITS Math? My question aims at the following problem. I created a new symbol which I then want to load into my document. Since this is not a standard/known symbol I cannot refer to it via a standard/printable symbol. I will update my question regarding this information. – Stefan Mar 31 '12 at 13:20
see edit of my answer – Herbert Mar 31 '12 at 13:43
But then I cannot typeset $1 1$ anymore where the first one is typeset in Latin Modern and the second one is typeset in XITS. Again this all goes back to the problem that I want to define a new operator symbol such that I can write a \fancynewop b where \fancynewop should be a symbol out of an OTF file Untitled1.otf. – Stefan Mar 31 '12 at 15:11
@Stefan: I don't see why you want the same symbol to be taken from different fonts in the same formula, why don't you give your new symbol a unique code point in the private use area and simplify the issue. – Khaled Hosny Mar 31 '12 at 15:26
@Stefan: see 2nd example in my answer – Herbert Mar 31 '12 at 15:33