On Sunday, August 16, 2020 at 4:22:22 AM UTC-7, Dima Pasechnik wrote:
>
>
> I guess this has to do with Python hashing; objects are not checked
> for `==` equality when you do {},
> but for equality w.r.t. to certain internal representation:
> sage: g = libgap.SymmetricGroup(3)
> sage: x =
On Sun, Aug 16, 2020 at 11:44 AM 'Peter Mueller' via sage-support
wrote:
>
> I had a hard to track down error which eventually relied on sage permutation
> groups behave odd in regard to subgroups. A subgroup y of a subgroup x of g
> isn't always considered as a subgroup of g. Compare
>
> sage:
I had a hard to track down error which eventually relied on sage
permutation groups behave odd in regard to subgroups. A subgroup y of a
subgroup x of g isn't always considered as a subgroup of g. Compare
sage: g = SymmetricGroup(2)
: x = g.subgroup([])
: y = x.subgroup([])
: x == y
