if A⊈A, what happens to empty set? (if any set is not a subset of itself)

Описание: in set theory, any set is a subset of itself.
have you wondered if any set must be a subset of itself?
because usually sub means a smaller part of the whole.
this video dealts with this question.
this question is related to the empaty set.
You will gain a broad perspective on set theory.
#subset #emptyset #settheoryclass11

why any set is a subset of itself?
what happens if any set is not a subset of itself?
what happens to empty set?
3 solutions to the problem
the reason why any set is a subset of itself.