#6337: bug in jordan_form over symbolic ring
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Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-5.11
Component: linear algebra | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Changes (by darij):
* upstream: => N/A
Comment:
This one looks different now:
{{{
sage: sage: var('a d')
(a, d)
sage: sage: A = matrix([[a,0],[1,d]])
sage: sage: A.eigenvalues()
[d, a]
sage: sage: A.jordan_form()
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
<ipython-input-8-708dc91119f4> in <module>()
----> 1 A.jordan_form()
/home/darij/sage-5.11.beta3/local/lib/python2.7/site-
packages/sage/matrix/matrix2.so in sage.matrix.matrix2.Matrix.jordan_form
(sage/matrix/matrix2.c:44267)()
ValueError: Jordan normal form not implemented over inexact rings.
}}}
I agree that the symbolic ring is inexact, and that Jordan normal form
requires exactness...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6337#comment:3>
Sage <http://www.sagemath.org>
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