Le 24/10/2019 à 09:53, Simon King a écrit :
On 2019-10-24, Michael Jung <micj...@uni-potsdam.de> wrote:
Do you have an example where SR fails to be exact?
One can convert a float to SR. The result is in SR, but still behaves
like a float:
sage: a = SR(2.)^(1/500)
sage: a^500
2.00000000000005
sage: a.parent()
Symbolic Ring
This was an easy one. The following shows that SR is just
broken.... pi is rational!
sage: q = continued_fraction(pi).convergent(100)
sage: q
8736149038303113005348154524599771853409352442745266/2780802606066896232581239559281727773240004199722661
sage: bool(pi == q)
True
And everything is with exact numbers.
Vincent
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