Theorem a4i 1166

Description: Inference rule reversing generalization.

Hypothesis

Ref	Expression
a4i.1	|- A.xph

Assertion

Ref	Expression
a4i	|- ph

Proof of Theorem a4i

Step	Hyp	Ref	Expression
1		a4i.1	. 2 |- A.xph
2		ax-4 1157	. 2 |- (A.xph -> ph)
3	1, 2	ax-mp 7	1 |- ph

Syntax hints:  A.wal 1134

This theorem is referenced by:  equidALT 1323  ersym 5141  ertr 5143  ac4 5708  ac5 5710  ac8 5721  kmlem2 5724  bnj861 12586  bnj871 12591  frxp 13743

This theorem was proved from axioms:  ax-mp 7  ax-4 1157

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