Theorem ralrimdv 2440

Description: Inference from Theorem 19.21 of [Margaris] p. 90. (Restricted quantifier version.) (Contributed by NM, 27-May-1998.)

Hypothesis

Ref	Expression
ralrimdv.1	|- ( ph -> ( ps -> ( x e. A -> ch ) ) )

Assertion

Ref	Expression
ralrimdv	|- ( ph -> ( ps -> A. x e. A ch ) )

Distinct variable groups:   ph, x   ps, x

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

Proof of Theorem ralrimdv

Step	Hyp	Ref	Expression
1		nfv 1461	. 2 |- F/ x ph
2		nfv 1461	. 2 |- F/ x ps
3		ralrimdv.1	. 2 |- ( ph -> ( ps -> ( x e. A -> ch ) ) )
4	1, 2, 3	ralrimd 2439	1 |- ( ph -> ( ps -> A. x e. A ch ) )

Syntax hints:   -> wi 4   e. wcel 1433   A.wral 2348

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1376  ax-gen 1378  ax-4 1440  ax-17 1459

This theorem depends on definitions:  df-bi 115  df-nf 1390  df-ral 2353

This theorem is referenced by:  ralrimdva  2441  ralrimivv  2442  nneneq  6343  fzrevral  9122