Theorem a4i 1023

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 1014	. 2 |- (A.xph -> ph)
3	1, 2	ax-mp 7	1 |- ph

Syntax hints:  A.wal 995

This theorem is referenced by:  equidALT 1168  ersym 4330  ertr 4332  ac4 4812  ac5 4814  ac8 4825  kmlem2 4828

This theorem was proved from axioms:  ax-mp 7  ax-4 1014

Copyright terms: Public domain