Theorem reximdv2 2460

Description: Deduction quantifying both antecedent and consequent, based on Theorem 19.22 of [Margaris] p. 90. (Contributed by NM, 17-Sep-2003.)

Hypothesis

Ref	Expression
reximdv2.1	|- ( ph -> ( ( x e. A /\ ps ) -> ( x e. B /\ ch ) ) )

Assertion

Ref	Expression
reximdv2	|- ( ph -> ( E. x e. A ps -> E. x e. B ch ) )

Distinct variable group:   ph, x

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

Proof of Theorem reximdv2

Step	Hyp	Ref	Expression
1		reximdv2.1	. . 3 |- ( ph -> ( ( x e. A /\ ps ) -> ( x e. B /\ ch ) ) )
2	1	eximdv 1801	. 2 |- ( ph -> ( E. x ( x e. A /\ ps ) -> E. x ( x e. B /\ ch ) ) )
3		df-rex 2354	. 2 |- ( E. x e. A ps <-> E. x ( x e. A /\ ps ) )
4		df-rex 2354	. 2 |- ( E. x e. B ch <-> E. x ( x e. B /\ ch ) )
5	2, 3, 4	3imtr4g 203	1 |- ( ph -> ( E. x e. A ps -> E. x e. B ch ) )

Syntax hints:   -> wi 4   /\ wa 102   E.wex 1421   e. wcel 1433   E.wrex 2349

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-ie1 1422  ax-ie2 1423  ax-4 1440  ax-17 1459  ax-ial 1467

This theorem depends on definitions:  df-bi 115  df-rex 2354

This theorem is referenced by:  ssrexv  3059  ssimaex  5255  ico0  9270  ioc0  9271  r19.2uz  9879