[XeTeX] Prime + Unicode-math

Khaled Hosny khaledhosny at eglug.org
Sun Oct 3 20:11:40 CEST 2010

On Sun, Oct 03, 2010 at 06:26:51PM +0100, José Carlos Santos wrote:
> Hi all,
> If I compile this file:
> \documentclass{article}
> \usepackage{fontspec}
> \usepackage{xltxtra}
> \usepackage{unicode-math}
> \begin{document}
> $P'$
> \end{document}
> I get this error message:
> ! Undefined control sequence.
> <argument> \um_prime_single_mchar
> l.6 $P'$

You need to use a Unicode math font as well, TeXLive have XITS and
Asana Math. There is no point in loading unicode-math without using a
Unicode math font. I thin unicode-math package should handle this
though, like issuing a warning or something.

 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer

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