Inspired by this question, I stumbled in an unexpected difficulty when trying to compare two Sets :
sage: L[:2]
[[
[ 2 -2] [0 1] [ 0 1]
[-2 1], [0 1], [ 0 -1/2]
],
[
[ 2 -2] [ 0 1] [0 1]
[-2 1], [ 0 -1/2], [0 1]
]]
sage: Set(L[0][1:])==Set(L[1][1:])
False
Quite unexpected... However :
sage: all([u in Set(L[1][1:]) for u in Set(L[0][1:])])
True
sage: all([u in Set(L[0][1:]) for u in Set(L[1][1:])])
True
as expected.
The Sets reference doesn't mention testing forv Sets equality.
Is that a bug, an oversight or an expected behaviour ?
