In order to try to track down the problem with Python 3 and
polynomial_rational_flint.pyx on Debian (see
https://trac.sagemath.org/ticket/28334 — help wanted!), I installed
VirtualBox and a Debian 10 virtual machine on my iMac. Most doctests pass,
but I am getting some numerical noise. Did I misconfigure something? Is
this to be expected? Any advice?
For example:
File "src/sage/calculus/interpolators.pyx", line 191, in
sage.calculus.interpolators.complex_cubic_spline
Failed example:
cs.derivative(2)
Expected:
(-0.0497765406583...+0.151095006434...j)
Got:
(-0.04977602323949545+0.15109527580806253j)
File "src/sage/calculus/riemann.pyx", line 173, in
sage.calculus.riemann.Riemann_Map
Failed example:
print("error = {}".format(m.inverse_riemann_map(m.riemann_map(x)) -
x)) # long time
Expected:
error = (-0.000...+0.0016...j)
Got:
error = (0.0006698241837047592+0.0003692515183057285j)
**********************************************************************
File "src/sage/calculus/riemann.pyx", line 422, in
sage.calculus.riemann.Riemann_Map.get_szego
Failed example:
s(3*pi / 4)
Expected:
0.0012158...
Got:
0.0012508938619074255
**********************************************************************
There are a few more worrisome failures:
File "src/sage/matrix/matrix_double_dense.pyx", line 629, in
sage.matrix.matrix_double_dense.Matrix_double_dense.condition
Failed example:
A.condition() # tol 2e-4
Expected:
16332197709146.014
Got:
5.908570618719731e+19
Tolerance exceeded:
16332197709146.014 vs 5.908570618719731e+19, tolerance 4e6 > 2e-4
**********************************************************************
sage -t --long src/sage/matrix/matrix_integer_dense.pyx
**********************************************************************
File "src/sage/matrix/matrix_integer_dense.pyx", line 3717, in
sage.matrix.matrix_integer_dense.Matrix_integer_dense.determinant
Failed example:
A.determinant(algorithm='linbox',proof=False) == d
Expected:
True
Got:
False
**********************************************************************
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