On Oct 5, 5:43 pm, Paul wrote:
> sage: mat1 = Matrix(4,4,[[-e^-((1/2)*a*k),0,sin(-(1/2)*a*l),cos(-(1/2)
> *a*l)],[0,e^(-(1/2)*a*k),-sin((1/2)*a*l),-cos((1/2)*a*l)],[-k*e^-((1/2)
> *a*k),0,l*cos(-(1/2)*a*l),-l*sin(-(1/2)*a*l)],[0,k*e^(-(1/2)*a*k),l*cos
> ((1/2)*a*l),-l*sin((1/2)*a*l)]])
Sage use
Unfortunately, a lot of stuff with symbolic matrices is now broken
after our switch to using Pynac/Ginac for symbolics. We only just
uncovered a lot of it. In fact, we're not even sure what's all
broken! See http://trac.sagemath.org/sage_trac/ticket/6934 for (a
little) more information. But
\left(\begin{array}{}
-e^{-\frac{1}{2} \, a k} & 0 & \sin\left(-\frac{1}{2} \, a l\right) &
\cos\left(-\frac{1}{2} \, a l\right) \\
0 & e^{-\frac{1}{2} \, a k} & -\sin\left(\frac{1}{2} \, a l\right) & -
\cos\left(\frac{1}{2} \, a l\right) \\
-k e^{-\frac{1}{2} \, a k} & 0 & l \cos\left(-\frac{
On Mon, Oct 5, 2009 at 4:28 PM, Paul wrote:
>
> I'm trying to run sage matrix operations (ex, solve, eigenvalues,
> eigenvectors) on a matrix constant constants variables (variables I've
> defined that do not yet have a numeric value), but the ops seem to
> either fail, or produce an unreadable a
