#6441: [with patch, needs work] Charpoly (plus adjoint and det)
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Reporter: spancratz | Owner: somebody
Type: defect | Status: new
Priority: minor | Milestone: sage-4.1.2
Component: linear algebra | Keywords: charpoly, division-free
Reviewer: | Author: Sebastian Pancratz
Merged: |
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Comment(by spancratz):
I think I've now separated the changes and am attaching a patch to this
message, containing only the new method "_charpoly_df" and all necessary
changes to make everything work and see the doctests pass. At the moment,
the question whether a ring is a field (or an integral domain) is still
handled in the same way as in the other patch. I think that in principle
this is the right way to handle this (because the problem comes up in
other similar places, too, for example when creating vectors over certain
rings), but in the next few days I'll post something to sage-devel to have
a discussion there.
About the attached patch file, all the doctests pass, but when building
the reference manual there are three warnings, and it seems (I put it this
way because I don't know much about it) as if it does have to do with the
file sage/matrix/matrix2.pyx. The warning messages say something about
indentation of some docstrings, but when looking at those I could not find
any problems. Perhaps you could have a quick look at this?
I'll sort out the other miscellaneous changes that got mixed in with this
in the earlier patch file at some later point.
Please let me know if there is anything else you want me to change about
this.
Sebastian
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6441#comment:16>
Sage <http://sagemath.org/>
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