Theorem axc4i

Description: Inference version of axc4 . (Contributed by NM, 3-Jan-1993)

	Ref	Expression
Hypothesis	axc4i.1	|- ( A. x ph -> ps )
Assertion	axc4i	|- ( A. x ph -> A. x ps )

Proof

Step	Hyp	Ref	Expression
1		axc4i.1	|- ( A. x ph -> ps )
2		nfa1	|- F/ x A. x ph
3	2 1	alrimi	|- ( A. x ph -> A. x ps )