On 28/06/17 10:51, François Bissey wrote:
with the peculiar being:
**********************************************************************
File "src/sage/rings/real_double.pyx", line 2296, in
sage.rings.real_double.RealDoubleElement.arccos
Failed example:
i.arccos() == q
Expected:
True
Got:
False
**********************************************************************
If anyone has an idea.
Definitely numerical noise.
sage: q = RDF.pi()/3
sage: i = q.cos()
sage: q - i.arccos()
-2.220446049250313e-16
Is this supposed to be exact?
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