#4273: Failure on Jordan form transformation matrices
----------------------------+-----------------------------------------------
Reporter: mhampton | Owner: was
Type: defect | Status: new
Priority: critical | Milestone: sage-3.1.3
Component: linear algebra | Keywords: jordan form, matrix
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Getting the change of basis matrix for Jordan forms fails if there are
multiple blocks with the same eigenvalue, e.g.:
{{{
m = matrix(QQ,[[0,1,0], [0,0,0], [0,0,0]])
m.jordan_form(base_ring=QQ, transformation=True)
}}}
gives
{{{
ValueError: cannot compute the basis of the Jordan block of size 2 with
eigenvalue 0
}}}
This was reported on sage-support by Rob Beezer, subject line is:
"Transformation to Jordan form for tame 6x6 integer matrix".
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4273>
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