Mathematics, Math, Programming, Discrete Mathematics.
that: #these sets equal each other! {1, 2, 3, 4} = {4, 3, 2, 1} {1, 2, 3, 4} = {1, 2, 2, 3, 4, 4, 4} As you can see despite the order and the duplicates these sets are still equal to each other. This is because sets don’t care about order and don’t consider duplicates when comparing equality. 3. ∈