Theorem elintrabg 3946

Description: Membership in the intersection of a class abstraction. (Contributed by NM, 17-Feb-2007.)

Assertion

Ref	Expression
elintrabg	|- ( A e. V -> ( A e. |^| { x e. B | ph } <-> A. x e. B ( ph -> A e. x ) ) )

Distinct variable group:   x, A

Allowed substitution hints:   ph( x)   B( x)   V( x)

Proof of Theorem elintrabg

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eleq1 2294	. 2 |- ( y = A -> ( y e. |^| { x e. B | ph } <-> A e. |^| { x e. B | ph } ) )
2		eleq1 2294	. . . 4 |- ( y = A -> ( y e. x <-> A e. x ) )
3	2	imbi2d 230	. . 3 |- ( y = A -> ( ( ph -> y e. x ) <-> ( ph -> A e. x ) ) )
4	3	ralbidv 2533	. 2 |- ( y = A -> ( A. x e. B ( ph -> y e. x ) <-> A. x e. B ( ph -> A e. x ) ) )
5		vex 2806	. . 3 |- y e. _V
6	5	elintrab 3945	. 2 |- ( y e. |^| { x e. B | ph } <-> A. x e. B ( ph -> y e. x ) )
7	1, 4, 6	vtoclbg 2866	1 |- ( A e. V -> ( A e. |^| { x e. B | ph } <-> A. x e. B ( ph -> A e. x ) ) )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1398   e. wcel 2202   A.wral 2511   {crab 2515   |^|cint 3933

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rab 2520  df-v 2805  df-int 3934

This theorem is referenced by: (None)