Theorem a4i 980

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-4 971	. 2 |- (A.xph -> ph)
3	1, 2	ax-mp 7	1 |- ph

Syntax hints:  A.wal 952

This theorem is referenced by:  ersym 4262  ertr 4264  ac4 4730  ac5 4732  ac8 4743  kmlem2 4746

This theorem was proved from axioms:  ax-mp 7  ax-4 971

Copyright terms: Public domain