#6441: [with patch, needs work] Charpoly (plus adjoint and det)
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Reporter: spancratz | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: linear algebra | Keywords: charpoly, division-free
Reviewer: | Author: Sebastian Pancratz
Merged: |
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Comment(by spancratz):
Dear Rob,
I've added two patch files to this now, one to include "is_field" and
"is_integral_domain" and another one to include the division-free matrix
methods (and some doctest fixes).
I think for the time being it would be easier to not create a ticket for
the assert-field stuff (and then work on it right away!) which this ticket
would depend on. One reason is that in a way I'd quite like to get this
done, but more importantly (a) the recent idea contributed by Robert
Bradshaw suggests to me that it's not quite clear how this should be done
properly in the long run and (b) once one has something like the
"_properties" attribute and "assert_foo" methods suggested in the thread
on sage-devel, this will require those little changes in many places
calling "is_field" etc, not just in the _charpoly_df method introduced
with this ticket.
That said, I think it's a good idea to create a separate trac ticket. If
you think it's a good idea, I'd be happy to follow the discussion on sage-
devel and create a trac ticket (with a link to the thread and a few
examples of what doesn't work in SAGE at the moment).
Kind regards,
Sebastian
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6441#comment:22>
Sage <http://sagemath.org/>
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