this post was submitted on 07 Jul 2025
        
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Oh you are the numbers guy ? Name every number
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
What about -1 ?
So simple yet so effective as an answer
I'm going for the boring but practical answer: {x | x ∈ A} and {x | x ∉ A}. Obviously the second set is doing the heavy lifting.
You should know your limits