Theorem fnbigcup

Description: Bigcup is a function over the universal class. (Contributed by Scott Fenton, 11-Apr-2012)

	Ref	Expression
Assertion	fnbigcup	⊢ Bigcup Fn V

Proof

Step	Hyp	Ref	Expression
1		fobigcup	⊢ Bigcup : V –onto→ V
2		fofn	⊢ ( Bigcup : V –onto→ V → Bigcup Fn V )
3	1 2	ax-mp	⊢ Bigcup Fn V