>>>>> "Ben" == Ben Blomberg <bblomberg at mail.bradley.edu> writes:
Ben> Hello all,
Ben> I am working on a project with maxima and I have generated a
Ben> 21x21 matrix. The off diagonal elements have values from .1
Ben> to 1e-6. The on diagonal elements have values from 300 to
Ben> 500. I am trying to use maxima to find the eigenvalues of
Ben> this matrix however it takes several minutes to do the
Ben> calculations and then never displays a result, it
Ben> continuously says "reading output". Does maxima have trouble
Ben> with?matrices?this large? Has anyone else had a similar
Ben> trouble and if so what did you do?
Ben> Its worth noting that mathematica can find the eigenvalues to
Ben> this matrix in about one minute.
You didn't say how you were calculating the eigenvalues. What were
you using? If I load(lapack), and use dgeev on a 21x21 matrix, I get
the eigenvalues in just 20 ms on my machine. (Loading lapack takes
a few minutes though.)
Ray