Theorem eximii

Description: Inference associated with eximi . (Contributed by BJ, 3-Feb-2018)

	Ref	Expression
Hypotheses	eximii.1	|- E. x ph
	eximii.2	|- ( ph -> ps )
Assertion	eximii	|- E. x ps

Proof

Step	Hyp	Ref	Expression
1		eximii.1	|- E. x ph
2		eximii.2	|- ( ph -> ps )
3	2	eximi	|- ( E. x ph -> E. x ps )
4	1 3	ax-mp	|- E. x ps