Thank you - but the calculus rules are still wrong:
/* [wxMaxima: input start ] */
diff( A(t)^^-1, t);
/* [wxMaxima: input end ] */
'diff(A(t)^^(-1),t,1)
Should be A^^-1 . 'diff(A(t),t) . A^^-1
(http://orion.uwaterloo.ca/~hwolkowi/matrixcookbook.pdf)
On Fri, Feb 17, 2012 at 2:25 PM, Stavros Macrakis <macrakis at alum.mit.edu>wrote:
> I can't help with the rest, but note that Maxima's notation for matrix
> inverse (symbolic or not) is A^^-1. "invert" is just a routine
> implementing a particular way of calculating explicit matrix inverses.
>
>