Category:Axioms/Axiom of Pairing

This category contains axioms related to Axiom of Pairing.
Related results can be found in Category:Axiom of Pairing.

Set Theory

For any two sets, there exists a set to which only those two sets are elements:

$\forall a: \forall b: \exists c: \forall z: \paren {z = a \lor z = b \iff z \in c}$

Class Theory

Let $a$ and $b$ be sets.

Then the class $\set {a, b}$ is likewise a set.