Theorem bdzfauscl 14727

Description: Closed form of the version of zfauscl 4125 for bounded formulas using bounded separation. (Contributed by BJ, 13-Nov-2019.)

Hypothesis

Ref	Expression
bdzfauscl.bd	|- BOUNDED ph

Assertion

Ref	Expression
bdzfauscl	|- ( A e. V -> E. y A. x ( x e. y <-> ( x e. A /\ ph ) ) )

Distinct variable groups:   x, y, A   ph, y

Allowed substitution hints:   ph( x)   V( x, y)

Proof of Theorem bdzfauscl

Dummy variable z is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eleq2 2241	. . . . . 6 |- ( z = A -> ( x e. z <-> x e. A ) )
2	1	anbi1d 465	. . . . 5 |- ( z = A -> ( ( x e. z /\ ph ) <-> ( x e. A /\ ph ) ) )
3	2	bibi2d 232	. . . 4 |- ( z = A -> ( ( x e. y <-> ( x e. z /\ ph ) ) <-> ( x e. y <-> ( x e. A /\ ph ) ) ) )
4	3	albidv 1824	. . 3 |- ( z = A -> ( A. x ( x e. y <-> ( x e. z /\ ph ) ) <-> A. x ( x e. y <-> ( x e. A /\ ph ) ) ) )
5	4	exbidv 1825	. 2 |- ( z = A -> ( E. y A. x ( x e. y <-> ( x e. z /\ ph ) ) <-> E. y A. x ( x e. y <-> ( x e. A /\ ph ) ) ) )
6		bdzfauscl.bd	. . 3 |- BOUNDED ph
7	6	bdsep1 14722	. 2 |- E. y A. x ( x e. y <-> ( x e. z /\ ph ) )
8	5, 7	vtoclg 2799	1 |- ( A e. V -> E. y A. x ( x e. y <-> ( x e. A /\ ph ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   A.wal 1351   = wceq 1353   E.wex 1492   e. wcel 2148  BOUNDED wbd 14649

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159  ax-bdsep 14721

This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2741

This theorem is referenced by:  bdinex1  14736