Theorem elriin 4039

Description: Elementhood in a relative intersection. (Contributed by Mario Carneiro, 30-Dec-2016.)

Assertion

Ref	Expression
elriin	|- (B e. (A i^i |^|_x e. X S) <-> (B e. A /\ A.x e. X B e. S))

Distinct variable groups:   x,A   x,X   x,B

Allowed substitution hint:   S(x)

Proof of Theorem elriin

Step	Hyp	Ref	Expression
1		elin 3220	. 2 |- (B e. (A i^i |^|_x e. X S) <-> (B e. A /\ B e. |^|_x e. X S))
2		eliin 3975	. . 3 |- (B e. A -> (B e. |^|_x e. X S <-> A.x e. X B e. S))
3	2	pm5.32i 618	. 2 |- ((B e. A /\ B e. |^|_x e. X S) <-> (B e. A /\ A.x e. X B e. S))
4	1, 3	bitri 240	1 |- (B e. (A i^i |^|_x e. X S) <-> (B e. A /\ A.x e. X B e. S))

Syntax hints:   <-> wb 176   /\ wa 358   e. wcel 1710  A.wral 2615   i^i cin 3209  |^|_ciin 3971

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-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ral 2620  df-v 2862  df-nin 3212  df-compl 3213  df-in 3214  df-iin 3973

This theorem is referenced by: (None)