Axiom:Axiom of Union
(Redirected from Axiom:Axiom of Union/Morse-Kelley)
Jump to navigation
Jump to search
Axiom
Let $x$ and $y$ be sets.
Then their union $x \cup y$ is a set.
Also see
Sources
- 1955: John L. Kelley: General Topology ... (previous) ... (next): Appendix: Elementary Set Theory: Existence of Sets: $\text {IV}$: Axiom of union