#11596: Cached eigenstuff is mutable
------------------------------+---------------------------------------------
   Reporter:  rbeezer         |          Owner:  jason, was
       Type:  defect          |         Status:  new       
   Priority:  major           |      Milestone:  sage-4.7.2
  Component:  linear algebra  |       Keywords:            
Work_issues:                  |       Upstream:  N/A       
   Reviewer:                  |         Author:            
     Merged:                  |   Dependencies:            
------------------------------+---------------------------------------------
 Ooops.

 {{{
 sage: A = matrix(QQ, 2, 2, range(4))
 sage: ev = A.eigenvalues()
 sage: ev
 [-0.5615528128088302?, 3.561552812808830?]
 sage: ev[0]=300
 sage: A.eigenvalues()
 [300, 3.561552812808830?]
 }}}

 I suspect eigenspaces and eigenmatrices might also need a look.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11596>
Sage <http://www.sagemath.org>
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