[XeTeX] alphabets in maths and \mathbf

[Vafa Khalighi]

I am writing a package for a maths font. Is there anyway that you can just
change the font of digits in \mathbf and not the font of aphabets inside
\mathbf.

To be more clear, if Isay

\DeclareMathAlphabet      {\mathbf}{OT1}{cmr}{bx}{n}

It will both changes the font of digits and the font of alphabets inside
\mathbf command. But I just would like to change the font of digits and not
the font of alphabets.

Is there any way to achieve this?

Thanks

-- 
Best wishes,
Vafa Khalighi
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