[metapost] Stroke Font

[Troy Henderson]

>
> Here is an attempt that goes the way you describe.
>
> Regards,
> Laurent Méhats
>

I've attached a sample, and I'm having a little trouble applying your
technique to math.  Attached is the source file(s) and resulting output
PDF.  As you can see, the fraction line is the only part of the formula
that is not "traced".  I would appreciate any help on fixing this.

Troy
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