Here's a related problem.
The math symbols in XITS seem rather small. When trying to increase XITS
character size with the Scale option, I noticed that math accents get
amplified too much, and get placed too far from the subject symbols. The
example below shows that by comparing XITS and Asana math fonts.
\documentclass{article}
\usepackage{fontspec}
\usepackage{xltxtra}
\usepackage{unicode-math}
\begin{document}
\setmathfont[Scale=2.5]{XITS}
$P'''$
\setmathfont[Scale=1.5]{Asana Math}
$P'''$
\end{document}
Kamal Abdali
================
On Sun, Oct 3, 2010 at 14:11, Khaled Hosny <khaledho...@eglug.org> wrote:
> 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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