Hi Dan!

On 5 Nov., 00:15, Dan Drake <dr...@kaist.edu> wrote:
...
> There's a space between "eigenvalues" and "()". Python (and hence Sage)
> gets confused by that. Use A.eigenvalues() with no spaces.

No, that's not true. On sage.math, it works with the additional space.
  sage: A = matrix([[0, 4], [-1, 0]])
  sage: A.eigenvalues ()
  [-2*I, 2*I]

So, probably it is really just the vintage sage 3.0.5

Cheers,
Simon
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