[XeTeX] Equation numbering problem in appendixes

[snvv]

Thank you Niko,
You said something about the prime.
So what I did was 
\renewcommand{\thechapter}{$\textrm{A}^\prime${}}

and I change the A inside \textrm in every chapter of the appendixes.
It far from optimal and the results are just satisfactory but I have no time 
to look further the issue.
By the way FreeSans & FreeSerif works perfectly but they have some issues with 
italics.

Thank you very much.
Sotiris

On Saturday 12 September 2009 11:58:47 Nikos Platis wrote:
> The problem is with the prime (something like ') used for the greek
> numbering, apparently the character used does not exist in every font...
> Don't know of any easy solution...
> 
> Nikos
> 
> On Sat, Sep 12, 2009 at 08:40, snvv <snvv101 at gmail.com> wrote:
> > Hello
> > I have a problem with equation numbering in appendixes.
> >
> > The numbering of equations is (A  .1) see attached file.
> >
> > In preamble I use the xgreek package &
> > \setmainfont[Mapping=tex-text,Scale=1]{Times New Roman}
> >
> > Is it possible to do something with this?
> >
> > PS. I have formatted all the document about 250 pages with Times New
> > Roman and
> > I am quite happy with the results.
> > The only problem is in appendixes.
> >
> > Thank you in advance for your help.
> > Sotiris
>