Professor, I'm a brazilian Mathematics' student and I'm interested by Mathematical Logic (Proof Theory, for example). I would like to ask you a few questions about postgraduating in the area there (at USA).
@kainenfecteau9001
3 ай бұрын
17:10 If I wanted to use the subset axiom, could I say {{B} × B ∈ P(P(A) × A) : B≠∅} ?
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