Theorem spcimegft 2676

Description: A closed version of spcimegf 2679. (Contributed by Mario Carneiro, 4-Jan-2017.)

Hypotheses

Ref	Expression
spcimgft.1	|- F/ x ps
spcimgft.2	|- F/_ x A

Assertion

Ref	Expression
spcimegft	|- ( A. x ( x = A -> ( ps -> ph ) ) -> ( A e. B -> ( ps -> E. x ph ) ) )

Proof of Theorem spcimegft

Step	Hyp	Ref	Expression
1		elex 2610	. 2 |- ( A e. B -> A e. _V )
2		spcimgft.2	. . . . 5 |- F/_ x A
3	2	issetf 2606	. . . 4 |- ( A e. _V <-> E. x x = A )
4		exim 1530	. . . 4 |- ( A. x ( x = A -> ( ps -> ph ) ) -> ( E. x x = A -> E. x ( ps -> ph ) ) )
5	3, 4	syl5bi 150	. . 3 |- ( A. x ( x = A -> ( ps -> ph ) ) -> ( A e. _V -> E. x ( ps -> ph ) ) )
6		spcimgft.1	. . . 4 |- F/ x ps
7	6	19.37-1 1604	. . 3 |- ( E. x ( ps -> ph ) -> ( ps -> E. x ph ) )
8	5, 7	syl6 33	. 2 |- ( A. x ( x = A -> ( ps -> ph ) ) -> ( A e. _V -> ( ps -> E. x ph ) ) )
9	1, 8	syl5 32	1 |- ( A. x ( x = A -> ( ps -> ph ) ) -> ( A e. B -> ( ps -> E. x ph ) ) )

Syntax hints:   -> wi 4   A.wal 1282   = wceq 1284   F/wnf 1389   E.wex 1421   e. wcel 1433   F/_wnfc 2206   _Vcvv 2601

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-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063

This theorem depends on definitions:  df-bi 115  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-v 2603

This theorem is referenced by:  spcegft  2677  spcimegf  2679  spcimedv  2684