Theorem ralbidv2 2328

Description: Formula-building rule for restricted universal quantifier (deduction rule). (Contributed by NM, 6-Apr-1997.)

Hypothesis

Ref	Expression
ralbidv2.1	|- ( ph -> ( ( x e. A -> ps ) <-> ( x e. B -> ch ) ) )

Assertion

Ref	Expression
ralbidv2	|- ( ph -> ( A. x e. A ps <-> A. x e. B ch ) )

Distinct variable group:   ph, x

Allowed substitution hints:   ps( x)   ch( x)   A( x)   B( x)

Proof of Theorem ralbidv2

Step	Hyp	Ref	Expression
1		ralbidv2.1	. . 3 |- ( ph -> ( ( x e. A -> ps ) <-> ( x e. B -> ch ) ) )
2	1	albidv 1705	. 2 |- ( ph -> ( A. x ( x e. A -> ps ) <-> A. x ( x e. B -> ch ) ) )
3		df-ral 2311	. 2 |- ( A. x e. A ps <-> A. x ( x e. A -> ps ) )
4		df-ral 2311	. 2 |- ( A. x e. B ch <-> A. x ( x e. B -> ch ) )
5	2, 3, 4	3bitr4g 212	1 |- ( ph -> ( A. x e. A ps <-> A. x e. B ch ) )

Syntax hints:   -> wi 4   <-> wb 98   A.wal 1241   e. wcel 1393   A.wral 2306

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1336  ax-gen 1338  ax-17 1419

This theorem depends on definitions:  df-bi 110  df-ral 2311

This theorem is referenced by:  ralss  3006  dfsmo2  5902  raluz  8521