#11897: Fix eigenmatrix doctest to work across all platforms
---------------------------------------------------+------------------------
   Reporter:  rbeezer                              |          Owner:  jason, was
       Type:  defect                               |         Status:  needs_work
   Priority:  minor                                |      Milestone:  sage-4.7.2
  Component:  linear algebra                       |       Keywords:            
Work_issues:                                       |       Upstream:  N/A       
   Reviewer:  Karl-Dieter Crisman, Leif Leonhardy  |         Author:  Rob Beezer
     Merged:                                       |   Dependencies:            
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Old description:

> Doctest for RDF matrix fails on some platforms by returning the negatives
> of the more commonly returned eigenvectors.
>
> See sage-release discussion:
> http://groups.google.com/group/sage-release/msg/e885e53316c6880f
>
> ----
>
> Apply only [attachment:trac_11897-doctest-RDF-eigenmatrix.rebased.patch]
> to the Sage library.

New description:

 Doctest for RDF matrix fails on some platforms by returning the negatives
 of the more commonly returned eigenvectors.

 See sage-release discussion:
 http://groups.google.com/group/sage-release/msg/e885e53316c6880f

 ----

 Apply
  1. [attachment:trac_11897-doctest-RDF-eigenmatrix.rebased.patch]
  1. [attachment:trac_11897-fix_noisy_zeroes_in_eigenvalues.reviewer.patch]
 to the Sage library.

--

Comment(by leif):

 Next try.

 (I've attached a reviewer patch to be applied on top.)

 Hopefully `2e-15` suffices for `bsd.math` as well... Apple c**p...

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11897#comment:11>
Sage <http://www.sagemath.org>
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