On Mon, Mar 8, 2021 at 9:25 AM Alex Braat <
alex...@gmail.com> wrote:
>
> Hello,
>
> I have encountered some strange behavior when I evaluate multivariate polynomials over the integers modulo n. For instance,
>
> In:
> p = 3
> S = Integers(p^2)
> R.<x,y> = PolynomialRing(S)
> f = x^2 * y^2
> print(f([S(p),S(1)]), f([S(1), S(p)]))
>
> Out:
> 1 0
>
> while both evaluations should ofcourse be equal to 0. This does not depend on the prime p, and is consistent in both of these versions of SageMath:
looks like a bug (also in the 9.3.beta7)
sage: f(S(3),S(1))
1
>
> 'SageMath version 8.7, Release Date: 2019-03-23'
> 'SageMath version 9.2, Release Date: 2020-10-24'
>
> Am I doing something wrong or is this a bug?
>
> --
> You received this message because you are subscribed to the Google Groups "sage-support" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to
sage-support...@googlegroups.com.
> To view this discussion on the web visit
https://groups.google.com/d/msgid/sage-support/e3b67e84-1d8b-46e4-b0dd-5558f6d4929bn%40googlegroups.com.