#3498: [with patch, needs work] make numpy the backend for matrices over CDF and
RDF
----------------------------+-----------------------------------------------
 Reporter:  jason           |        Owner:  was       
     Type:  defect          |       Status:  new       
 Priority:  major           |    Milestone:  sage-3.1.3
Component:  linear algebra  |   Resolution:            
 Keywords:                  |  
----------------------------+-----------------------------------------------
Changes (by malb):

  * summary:  [with patch, needs review] make numpy the backend for
              matrices over CDF and RDF => [with patch, needs
              work] make numpy the backend for matrices over
              CDF and RDF

Comment:

 '''Review'''
  * patch applies cleanly
  * I skimmed the code and it looks fine, I didn't thoroughly read it
 though
  * Is there any chance that we can get rid of the toplevel numpy imports
 (they were removed just recently and I wonder whether we can get away
 without them for startup time reasons)
  * doctests (64-bit Linux)
 {{{
 File "/home/malb/sage-3.1.3.alpha1/tmp/matrix_double_dense.py", line 854:
     sage: U*U.transpose()
 Expected:
     [              1.0 2.13506512817e-16]
     [2.13506512817e-16               1.0]
 Got:
     [              1.0 2.66876364757e-16]
     [2.66876364757e-16               1.0]
 **********************************************************************
 File "/home/malb/sage-3.1.3.alpha1/tmp/matrix_double_dense.py", line 859:
     sage: V*V.transpose()
 Expected:
     [               1.0  2.02230810223e-16 -2.11947972194e-16]
     [ 2.02230810223e-16                1.0  7.09339271349e-17]
     [-2.11947972194e-16  7.09339271349e-17                1.0]
 Got:
     [               1.0  5.94955942151e-17 -1.77117977403e-16]
     [ 5.94955942151e-17                1.0 -8.87690528723e-17]
     [-1.77117977403e-16 -8.87690528723e-17                1.0]
 **********************************************************************
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3498#comment:10>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of 
Reinventing the Wheel
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