Vectors

[Olivier Parisy]

Hi,

I'd be interested in representing cartesian vectors in GiNaC.
I suppose I could represent one using a matrix, but having
a specific node for it and, as an example, for cross product
or vectors sum would allow for higher-level expressions
representation.

I didn't see any hint for this in the current GiNaC
distribution or in its todo list, but perhaps anyone already
did it ? Any advice ?

Regards,
Olivier Parisy.