6 ms·
The collection of all sets is not a set under ZF set theory, regardless of choice. Such a collection, if it were a set, would imply the existence of a set of a
by gambling8nt 17y ago
The collection of all sets is not a set under ZF set theory, regardless of choice.
Such a collection, if it were a set, would imply the existence of a set of all sets that did not contain themselves from the axiom schema of specification.