Theorem viin 3932

Description: Indexed intersection with a universal index class. (Contributed by NM, 11-Sep-2008.)

Assertion

Ref	Expression
viin	|- |^|_ x e. _V A = { y | A. x y e. A }

Distinct variable groups:   x, y   y, A

Allowed substitution hint:   A( x)

Proof of Theorem viin

Step	Hyp	Ref	Expression
1		df-iin 3876	. 2 |- |^|_ x e. _V A = { y | A. x e. _V y e. A }
2		ralv 2747	. . 3 |- ( A. x e. _V y e. A <-> A. x y e. A )
3	2	abbii 2286	. 2 |- { y | A. x e. _V y e. A } = { y | A. x y e. A }
4	1, 3	eqtri 2191	1 |- |^|_ x e. _V A = { y | A. x y e. A }

Syntax hints:   A.wal 1346   = wceq 1348   e. wcel 2141   {cab 2156   A.wral 2448   _Vcvv 2730   |^|_ciin 3874

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-11 1499  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-ral 2453  df-v 2732  df-iin 3876

This theorem is referenced by: (None)