3 ms·
Yes, which is why ZFC gets used. NBG & MK are stronger and occasionally used, but ZFC being weaker meant it got more popular since it's almost always good enoug
by SAI_Peregrinus 1y ago
Yes, which is why ZFC gets used. NBG & MK are stronger and occasionally used, but ZFC being weaker meant it got more popular since it's almost always good enough.