eigenvalues, part: fell off the end



Thank you very much, the charpoly doesn't abort. 
There's a minor catch, though.
The result is virtually unreadable as a whole, 
can't be parsed(?) or indexed(?), and there 
seems to be no info on degeneration, anyway?

-Yury

On 07/28/2013 07:25 PM, Leo Butler wrote:
>     From: Yury Tarasievich <yury.tarasievich at gmail.com>
>
>     Hi guys,
>
>     On Maxima 5.30/linux/amd64, I'm getting this
>     with fairly simple block-diagonal symbolic
>     matrix of 10x10 and/or 11x11 dimension:
>
>     E:eigenvalues(opH)
>     part: fell off the end.
>
>     But with matrix of dimension 9x9 and lower the
>     routine completes okay.
>
>     What could/should I try? Should I post the
>     matrix in the form it's 'print'ed, too?
>
>     The alt_eigen solution recommended earlier in
>     this list can't pass its own tests on 5.30.
>
>     Is there anything else?
>
> Yury, have you tried
>
> p : charpoly(opH,x);
>
> ?
>
> You likely have a factor in p that is of degree >4.
>
> Leo
>