Trouble with Eigenvalues



Hello all,

I am working on a project with maxima and I have generated a 21x21 matrix.
The off diagonal elements have values from .1 to 1e-6. The on diagonal
elements have values from 300 to 500. I am trying to use maxima to find the
eigenvalues of this matrix however it takes several minutes to do the
calculations and then never displays a result, it continuously says
"reading output". Does maxima have trouble with matrices this large? Has
anyone else had a similar trouble and if so what did you do?

Its worth noting that mathematica can find the eigenvalues to this matrix
in about one minute.

Thanks,
Ben