Show existence of set
51206
If $X$ and $Y$ are sets, their cartesian product $X\times Y$ is a set.
58594
Is the empty set a subset of itself?
153510
Questions about the existence of a function
151958
How to show $f'(0)$ exist and is equal to $1$?
34099
Proving that the empty set is unique
59535
Prove that there exists such a set of $n$ positive integers
18334
Equivalence between CH and existence of certain sets in $\mathbb{R}^2$
88982
Prove that for any two sets $A$ and $B$, $A\notin B$ or $B\notin A$
46240
Show that if $A$ and $B$ are sets, then $(A\cap B) \cup (A\cap \overline{B})=A$.
102592
Arbitrary Set A a Function??
158882
Prove the existence of some weird family of sets
111032
Proof of Sets involving the Cartesian Product
49143
Showing $A \subset B \iff A\cap B=A$
83518
Proving Two sets have same cardinality
1307
Infimum and supremum of the empty set
100333
Show A is countable infinity
154474
Image of countable and uncountable sets