Theorem reximdva0m 3263

Description: Restricted existence deduced from inhabited class. (Contributed by Jim Kingdon, 31-Jul-2018.)

Hypothesis

Ref	Expression
reximdva0m.1	|- ( ( ph /\ x e. A ) -> ps )

Assertion

Ref	Expression
reximdva0m	|- ( ( ph /\ E. x x e. A ) -> E. x e. A ps )

Distinct variable groups:   x, A   ph, x

Allowed substitution hint:   ps( x)

Proof of Theorem reximdva0m

Step	Hyp	Ref	Expression
1		reximdva0m.1	. . . . . 6 |- ( ( ph /\ x e. A ) -> ps )
2	1	ex 113	. . . . 5 |- ( ph -> ( x e. A -> ps ) )
3	2	ancld 318	. . . 4 |- ( ph -> ( x e. A -> ( x e. A /\ ps ) ) )
4	3	eximdv 1801	. . 3 |- ( ph -> ( E. x x e. A -> E. x ( x e. A /\ ps ) ) )
5	4	imp 122	. 2 |- ( ( ph /\ E. x x e. A ) -> E. x ( x e. A /\ ps ) )
6		df-rex 2354	. 2 |- ( E. x e. A ps <-> E. x ( x e. A /\ ps ) )
7	5, 6	sylibr 132	1 |- ( ( ph /\ E. x x e. A ) -> E. x e. A ps )

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: (None)