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Theorem iinab 4360
Description: Indexed intersection of a class builder. (Contributed by NM, 6-Dec-2011.)
Assertion
Ref Expression
iinab  |-  |^|_ x  e.  A  { y  |  ph }  =  {
y  |  A. x  e.  A  ph }
Distinct variable groups:    y, A    x, y
Allowed substitution hints:    ph( x, y)    A( x)

Proof of Theorem iinab
StepHypRef Expression
1 nfcv 2580 . . . 4  |-  F/_ y A
2 nfab1 2582 . . . 4  |-  F/_ y { y  |  ph }
31, 2nfiin 4328 . . 3  |-  F/_ y |^|_ x  e.  A  {
y  |  ph }
4 nfab1 2582 . . 3  |-  F/_ y { y  |  A. x  e.  A  ph }
53, 4cleqf 2607 . 2  |-  ( |^|_ x  e.  A  { y  |  ph }  =  { y  |  A. x  e.  A  ph }  <->  A. y ( y  e. 
|^|_ x  e.  A  { y  |  ph } 
<->  y  e.  { y  |  A. x  e.  A  ph } ) )
6 abid 2409 . . . 4  |-  ( y  e.  { y  | 
ph }  <->  ph )
76ralbii 2853 . . 3  |-  ( A. x  e.  A  y  e.  { y  |  ph } 
<-> 
A. x  e.  A  ph )
8 vex 3083 . . . 4  |-  y  e. 
_V
9 eliin 4305 . . . 4  |-  ( y  e.  _V  ->  (
y  e.  |^|_ x  e.  A  { y  |  ph }  <->  A. x  e.  A  y  e.  { y  |  ph }
) )
108, 9ax-mp 5 . . 3  |-  ( y  e.  |^|_ x  e.  A  { y  |  ph } 
<-> 
A. x  e.  A  y  e.  { y  |  ph } )
11 abid 2409 . . 3  |-  ( y  e.  { y  | 
A. x  e.  A  ph }  <->  A. x  e.  A  ph )
127, 10, 113bitr4i 280 . 2  |-  ( y  e.  |^|_ x  e.  A  { y  |  ph } 
<->  y  e.  { y  |  A. x  e.  A  ph } )
135, 12mpgbir 1667 1  |-  |^|_ x  e.  A  { y  |  ph }  =  {
y  |  A. x  e.  A  ph }
Colors of variables: wff setvar class
Syntax hints:    <-> wb 187    = wceq 1437    e. wcel 1872   {cab 2407   A.wral 2771   _Vcvv 3080   |^|_ciin 4300
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1663  ax-4 1676  ax-5 1752  ax-6 1798  ax-7 1843  ax-10 1891  ax-11 1896  ax-12 1909  ax-13 2057  ax-ext 2401
This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372  df-tru 1440  df-ex 1658  df-nf 1662  df-sb 1791  df-clab 2408  df-cleq 2414  df-clel 2417  df-nfc 2568  df-ral 2776  df-v 3082  df-iin 4302
This theorem is referenced by:  iinrab  4361
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