Le 13/12/2018 à 17:17, Jeroen Demeyer a écrit :
On 2018-12-13 13:11, John Cremona wrote:
The problem is that t is a pari gen and Sage tries too hard to compare
that with python 0.
This has nothing to do with Sage or Python, the "problem" is that PARI
considers [0] and 0 equal.
Which make sense if you think of [0] as a polynomial of degree 0, and
more generally as the zero vector. Sage does the same to some extent
sage: 0 == vector([0])
True
sage: 0 == QQ['x'].zero()
True
Personally, I think that Sage (really the package cypari2 which
implements the PARI <-> Python interface) should follow the PARI
semantics, even if they are dubious.
+1
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