#17331: Numerical noise is back in src/sage/matrix/matrix_double_dense.pyx
-------------------------+-------------------------------------------------
Reporter: darij | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: linear | Keywords: numerical noise, doctest
algebra | failure
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
-------------------------+-------------------------------------------------
{{{
sage -t src/sage/matrix/matrix_double_dense.pyx
**********************************************************************
File "src/sage/matrix/matrix_double_dense.pyx", line 1012, in
sage.matrix.matrix_double_dense.Matrix_double_dense.singular_values
Failed example:
A.singular_values(eps=None) # abs tol 5e-16
Expected:
[1.7953720595619975, 0.38027524595503703, 0.04473854875218107,
0.0037223122378911614, 0.0002330890890217751, 1.116335748323284e-05,
4.082376110397296e-07, 1.1228610675717613e-08, 2.2519645713496478e-10,
3.1113486853814003e-12, 2.6500422260778388e-14, 9.87312834948426e-17]
Got:
[1.7953720595619969,
0.3802752459550371,
0.04473854875218114,
0.003722312237891189,
0.00023308908902178912,
1.1163357483229223e-05,
4.0823761103637633e-07,
1.1228610665566416e-08,
2.251964510803022e-10,
3.1113474636612192e-12,
2.6497213779939672e-14,
1.048419319427735e-16]
Tolerance exceeded in 1 of 12:
1.7953720595619975 vs 1.7953720595619969, tolerance 6e-16 > 5e-16
**********************************************************************
File "src/sage/matrix/matrix_double_dense.pyx", line 1014, in
sage.matrix.matrix_double_dense.Matrix_double_dense.singular_values
Failed example:
A.singular_values(eps='auto') # abs tol 5e-16
Expected:
[1.7953720595619975, 0.38027524595503703, 0.04473854875218107,
0.0037223122378911614, 0.0002330890890217751, 1.116335748323284e-05,
4.082376110397296e-07, 1.1228610675717613e-08, 2.2519645713496478e-10,
3.1113486853814003e-12, 2.6500422260778388e-14, 0.0]
Got:
[1.7953720595619969,
0.3802752459550371,
0.04473854875218114,
0.003722312237891189,
0.00023308908902178912,
1.1163357483229223e-05,
4.0823761103637633e-07,
1.1228610665566416e-08,
2.251964510803022e-10,
3.1113474636612192e-12,
2.6497213779939672e-14,
0.0]
Tolerance exceeded in 1 of 12:
1.7953720595619975 vs 1.7953720595619969, tolerance 6e-16 > 5e-16
**********************************************************************
File "src/sage/matrix/matrix_double_dense.pyx", line 1016, in
sage.matrix.matrix_double_dense.Matrix_double_dense.singular_values
Failed example:
A.singular_values(eps=1e-4) # abs tol 5e-16
Expected:
[1.7953720595619975, 0.38027524595503703, 0.04473854875218107,
0.0037223122378911614, 0.0002330890890217751, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0]
Got:
[1.7953720595619969,
0.3802752459550371,
0.04473854875218114,
0.003722312237891189,
0.00023308908902178912,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0]
Tolerance exceeded in 1 of 12:
1.7953720595619975 vs 1.7953720595619969, tolerance 6e-16 > 5e-16
**********************************************************************
1 item had failures:
3 of 31 in
sage.matrix.matrix_double_dense.Matrix_double_dense.singular_values
[642 tests, 3 failures, 1.54 s]
}}}
This is on a virtualized Ubuntu
{{{
darij@travis-virtualbox:~/gitsage$ uname -s -r -v
Linux 3.2.0-70-generic #105-Ubuntu SMP Wed Sep 24 19:49:46 UTC 2014
}}}
on a Win7 64bit host.
--
Ticket URL: <http://trac.sagemath.org/ticket/17331>
Sage <http://www.sagemath.org>
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