Thanks for the replies everyone.

I tried it, and as someone mentioned, the space between eigenvalues
and () doesn't make a difference.

So I tried updating. I installed the binary distribution, but got the
"Illegal instruction" error at startup. So I tried the

rm spkg/installed/mpir* spkg/installed/atlas*
make

as given in the FAQ, but it still didn't work- I still got the
"illegal instruction". So I tried installing from source. I got the
"illegal instruction" error again, tried

rm spkg/installed/mpir* spkg/installed/atlas*
make

and again got "illegal instruction."

So then I thought, I'll just reinstall the 3.05 from Ubuntu's package
manager and install the patch. I deleted (well, I think) all of the
new sage stuff I installed, and reinstalled 3.05. But now when I type
"sage" into the terminal I get "/usr/local/bin/sage: No such file or
directory".

I have no idea where to go from here.

I'm using an 8 year old HP with a Pentium 4 CPU, it's 32 bit i686 with
Ubuntu 9.04.

I'm just going to give up, because doing all this took me many hours,
and I had to learn/try a lot of stuff about working with the command
line that I've never done before. The installation directions are
confusing to someone who doesn't know very much about computers. I
mean, I got Linux installed on my own, but I probably represent the
lower bound in computer knowledge of Linux users. I'm getting a new
computer in 4 months, so I'll just try again then.

Thanks for your help though.

On Nov 4, 9:16 pm, Jason Grout <jason-s...@creativetrax.com> wrote:
> Dan Drake wrote:
> > On Wed, 04 Nov 2009 at 04:07PM -0800, Simon King wrote:
> >> 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
>
> > Wow, you're right. I suppose it is a problem with 3.0.5. Are there any
> > plans to update the Debian package?
>
> Yes, sort of.  See the thread on a PPA package for Sage on sage-devel.
>
> Jason
>
> --
> Jason Grout
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