Axiom of union (source code)

= Axiom of union
{wiki=Axiom_of_union}

The Axiom of Union is one of the axioms in set theory, particularly within the Zermelo-Fraenkel set theory (ZF), which is a foundational system for mathematics. The Axiom of Union states that for any set \\( A \\), there exists a set \\( B \\) that contains exactly the elements of the elements of \\( A \\).