Gary Furnish once mentioned symbolics over matrix rings, but I never
saw it in action.  However, introducing 18 variables shouldn't bee too
tedious:
a = var(",".join("a%s"%i for i in range(9)))
b = var(",".join("b%s"%i for i in range(9)))
A = Matrix(3,a)
B = Matrix(3,b)

On Sun, Jul 4, 2010 at 4:11 AM, Cedric <man...@gmx.net> wrote:
> Hello guys, I just wanted to use Sage for solving a symbolic system of
> known and unknown matrices and wondered whether one can forgo the
> tedious process of introducing, say 18 variables for just two 3x3
> matrices and instead declare matrices as symbolic. Did anyone ever
> thought of doing something like that?
>
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