You might want to check out MathMorphs and related projects:
<http://mate.dm.uba.ar/~caniglia/mathMorphs.html>
<http://mate.dm.uba.ar/~caniglia/Linear/index.html>
<http://mate.dm.uba.ar/~caniglia/mathMorphs.html#announcements>
<http://mate.dm.uba.ar/~caniglia/Javier/projective.html>

At 2:33 PM -0500 on 11/13/00,  Edward Cottongim is rumored to have written:
>I was wondering if someone has already implemented some facilities 
>for vector math in Squeak yet. <snip>Thanks,