Theorem ralbiia 2449

Description: Inference adding restricted universal quantifier to both sides of an equivalence. (Contributed by NM, 26-Nov-2000.)

Hypothesis

Ref	Expression
ralbiia.1	|- ( x e. A -> ( ph <-> ps ) )

Assertion

Ref	Expression
ralbiia	|- ( A. x e. A ph <-> A. x e. A ps )

Proof of Theorem ralbiia

Step	Hyp	Ref	Expression
1		ralbiia.1	. . 3 |- ( x e. A -> ( ph <-> ps ) )
2	1	pm5.74i 179	. 2 |- ( ( x e. A -> ph ) <-> ( x e. A -> ps ) )
3	2	ralbii2 2445	1 |- ( A. x e. A ph <-> A. x e. A ps )

Syntax hints:   -> wi 4   <-> wb 104   e. wcel 1480   A.wral 2416

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1423  ax-gen 1425

This theorem depends on definitions:  df-bi 116  df-ral 2421

This theorem is referenced by:  frind  4274  poinxp  4608  soinxp  4609  seinxp  4610  dffun8  5151  funcnv3  5185  fncnv  5189  fnres  5239  fvreseq  5524  isoini2  5720  smores  6189  resixp  6627  finomni  7012  caucvgre  10753