Theorem elintrabg 3939

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 2413	. 2 |- (y = A -> (y e. |^|{x e. B | ph} <-> A e. |^|{x e. B | ph}))
2		eleq1 2413	. . . 4 |- (y = A -> (y e. x <-> A e. x))
3	2	imbi2d 307	. . 3 |- (y = A -> ((ph -> y e. x) <-> (ph -> A e. x)))
4	3	ralbidv 2634	. 2 |- (y = A -> (A.x e. B (ph -> y e. x) <-> A.x e. B (ph -> A e. x)))
5		vex 2862	. . 3 |- y e. _V
6	5	elintrab 3938	. 2 |- (y e. |^|{x e. B | ph} <-> A.x e. B (ph -> y e. x))
7	1, 4, 6	vtoclbg 2915	1 |- (A e. V -> (A e. |^|{x e. B | ph} <-> A.x e. B (ph -> A e. x)))

Syntax hints:   -> wi 4   <-> wb 176   = wceq 1642   e. wcel 1710  A.wral 2614  {crab 2618  |^|cint 3926

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ral 2619  df-rab 2623  df-v 2861  df-int 3927

This theorem is referenced by: (None)