#14117: Jordan normal form not computed for nilpotent matrix over rational
function
field / polynomials cannot be factored over rational function field
------------------------------------------------------------------+---------
Reporter: darij |
Owner: AlexGhitza
Type: defect |
Status: needs_work
Priority: major |
Milestone: sage-5.10
Component: algebra |
Resolution:
Keywords: polynomials, factorization, jordan normal form | Work
issues:
Report Upstream: N/A |
Reviewers: Luis Felipe Tabera Alonso
Authors: Darij Grinberg | Merged
in:
Dependencies: |
Stopgaps:
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Changes (by lftabera):
* status: needs_review => needs_work
* reviewer: => Luis Felipe Tabera Alonso
Comment:
With your example
{{{
sage: M.jordan_form(eigenvalues=[(0,3)])
[0 1|0]
[0 0|0]
[---+-]
[0 0|0]
sage: M.jordan_form(eigenvalues=[(1,3)])
[]
}}}
The code should not return the second but raise a type of error. Also, add
to the doctest a test with your eigenvalues option with
transformation=True to make sure it works as expected.
As a matter of style, avoid blank lines containing only blanckspaces (up
to the indent level) in your code. I think this is not enforced though.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14117#comment:6>
Sage <http://www.sagemath.org>
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