Theorem rspce 2829

Description: Restricted existential specialization, using implicit substitution. (Contributed by NM, 26-May-1998.) (Revised by Mario Carneiro, 11-Oct-2016.)

Hypotheses

Ref	Expression
rspc.1	|- F/ x ps
rspc.2	|- ( x = A -> ( ph <-> ps ) )

Assertion

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

Distinct variable groups:   x, A   x, B

Allowed substitution hints:   ph( x)   ps( x)

Proof of Theorem rspce

Step	Hyp	Ref	Expression
1		nfcv 2312	. . . 4 |- F/_ x A
2		nfv 1521	. . . . 5 |- F/ x A e. B
3		rspc.1	. . . . 5 |- F/ x ps
4	2, 3	nfan 1558	. . . 4 |- F/ x ( A e. B /\ ps )
5		eleq1 2233	. . . . 5 |- ( x = A -> ( x e. B <-> A e. B ) )
6		rspc.2	. . . . 5 |- ( x = A -> ( ph <-> ps ) )
7	5, 6	anbi12d 470	. . . 4 |- ( x = A -> ( ( x e. B /\ ph ) <-> ( A e. B /\ ps ) ) )
8	1, 4, 7	spcegf 2813	. . 3 |- ( A e. B -> ( ( A e. B /\ ps ) -> E. x ( x e. B /\ ph ) ) )
9	8	anabsi5 574	. 2 |- ( ( A e. B /\ ps ) -> E. x ( x e. B /\ ph ) )
10		df-rex 2454	. 2 |- ( E. x e. B ph <-> E. x ( x e. B /\ ph ) )
11	9, 10	sylibr 133	1 |- ( ( A e. B /\ ps ) -> E. x e. B ph )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1348   F/wnf 1453   E.wex 1485   e. wcel 2141   E.wrex 2449

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-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-rex 2454  df-v 2732

This theorem is referenced by:  rspcev  2834  bezoutlemmain  11953