#3498: [with patch, positive review] make numpy the backend for matrices over
CDF
and RDF
----------------------------+-----------------------------------------------
Reporter: jason | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.2
Component: linear algebra | Resolution:
Keywords: |
----------------------------+-----------------------------------------------
Changes (by mabshoff):
* milestone: sage-3.2.1 => sage-3.2
Comment:
There are some numerical noise issues to fix:
{{{
sage -t -long devel/sage/sage/matrix/matrix_double_dense.pyx
**********************************************************************
File "/scratch/mabshoff/release-
cycle/sage-3.2.rc0/devel/sage/sage/matrix/matrix_double_dense.pyx", line
887:
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 "/scratch/mabshoff/release-
cycle/sage-3.2.rc0/devel/sage/sage/matrix/matrix_double_dense.pyx", line
892:
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:40>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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