I would just say that the first ones tries to describe the reals, but fail. Similary with the rationals. Like the second one, x belongs to the set containing itself and the real line. So in best case, x is the real line, not a member of the real line.
Hmm… the first three are the reals, but the last one is the rationals. Am I reading that right?
I would just say that the first ones tries to describe the reals, but fail. Similary with the rationals. Like the second one, x belongs to the set containing itself and the real line. So in best case, x is the real line, not a member of the real line.
No, n is rational.