Theorem 19.28v 1341

Description: Theorem 19.28 of [Margaris] p. 90.

Assertion

Ref	Expression
19.28v	|- (A.x(ph /\ ps) <-> (ph /\ A.xps))

Distinct variable group:   ph,x

Proof of Theorem 19.28v

Step	Hyp	Ref	Expression
1		ax-17 1012	. 2 |- (ph -> A.xph)
2	1	19.28 1111	1 |- (A.x(ph /\ ps) <-> (ph /\ A.xps))

Syntax hints:   <-> wb 153   /\ wa 230  A.wal 995

This theorem is referenced by:  reu3 1978  iinss 2654  tfrlem2 3970  dfer2 4320  kmlem14 4840  kmlem15 4841

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-gen 1004  ax-17 1012  ax-4 1014  ax-5o 1016

This theorem depends on definitions:  df-bi 154  df-an 232

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