Theorem funcisf ≪ | index | src | ≫

theorem funcisf (A B F: set): $ func F A B -> isfun F $;

Step	Hyp	Ref	Expression
1		anll	isfun F /\ Dom F == A /\ Ran F C_ B -> isfun F
2	1	conv func	func F A B -> isfun F

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)