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Theorem bdcriota 10674
Description: A class given by a restricted definition binder is bounded, under the given hypotheses. (Contributed by BJ, 24-Nov-2019.)
Hypotheses
Ref Expression
bdcriota.bd  |- BOUNDED  ph
bdcriota.ex  |-  E! x  e.  y  ph
Assertion
Ref Expression
bdcriota  |- BOUNDED  ( iota_ x  e.  y 
ph )
Distinct variable group:    x, y
Allowed substitution hints:    ph( x, y)

Proof of Theorem bdcriota
Dummy variables  z  t are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 bdcriota.bd . . . . . . . . 9  |- BOUNDED  ph
21ax-bdsb 10613 . . . . . . . 8  |- BOUNDED  [ z  /  x ] ph
3 ax-bdel 10612 . . . . . . . 8  |- BOUNDED  t  e.  z
42, 3ax-bdim 10605 . . . . . . 7  |- BOUNDED  ( [ z  /  x ] ph  ->  t  e.  z )
54ax-bdal 10609 . . . . . 6  |- BOUNDED  A. z  e.  y  ( [ z  /  x ] ph  ->  t  e.  z )
6 df-ral 2353 . . . . . . . . 9  |-  ( A. z  e.  y  ( [ z  /  x ] ph  ->  t  e.  z )  <->  A. z
( z  e.  y  ->  ( [ z  /  x ] ph  ->  t  e.  z ) ) )
7 impexp 259 . . . . . . . . . . 11  |-  ( ( ( z  e.  y  /\  [ z  /  x ] ph )  -> 
t  e.  z )  <-> 
( z  e.  y  ->  ( [ z  /  x ] ph  ->  t  e.  z ) ) )
87bicomi 130 . . . . . . . . . 10  |-  ( ( z  e.  y  -> 
( [ z  /  x ] ph  ->  t  e.  z ) )  <->  ( (
z  e.  y  /\  [ z  /  x ] ph )  ->  t  e.  z ) )
98albii 1399 . . . . . . . . 9  |-  ( A. z ( z  e.  y  ->  ( [
z  /  x ] ph  ->  t  e.  z ) )  <->  A. z
( ( z  e.  y  /\  [ z  /  x ] ph )  ->  t  e.  z ) )
106, 9bitri 182 . . . . . . . 8  |-  ( A. z  e.  y  ( [ z  /  x ] ph  ->  t  e.  z )  <->  A. z
( ( z  e.  y  /\  [ z  /  x ] ph )  ->  t  e.  z ) )
11 sban 1870 . . . . . . . . . . . 12  |-  ( [ z  /  x ]
( x  e.  y  /\  ph )  <->  ( [
z  /  x ]
x  e.  y  /\  [ z  /  x ] ph ) )
12 clelsb3 2183 . . . . . . . . . . . . 13  |-  ( [ z  /  x ]
x  e.  y  <->  z  e.  y )
1312anbi1i 445 . . . . . . . . . . . 12  |-  ( ( [ z  /  x ] x  e.  y  /\  [ z  /  x ] ph )  <->  ( z  e.  y  /\  [ z  /  x ] ph ) )
1411, 13bitri 182 . . . . . . . . . . 11  |-  ( [ z  /  x ]
( x  e.  y  /\  ph )  <->  ( z  e.  y  /\  [ z  /  x ] ph ) )
1514bicomi 130 . . . . . . . . . 10  |-  ( ( z  e.  y  /\  [ z  /  x ] ph )  <->  [ z  /  x ] ( x  e.  y  /\  ph )
)
1615imbi1i 236 . . . . . . . . 9  |-  ( ( ( z  e.  y  /\  [ z  /  x ] ph )  -> 
t  e.  z )  <-> 
( [ z  /  x ] ( x  e.  y  /\  ph )  ->  t  e.  z ) )
1716albii 1399 . . . . . . . 8  |-  ( A. z ( ( z  e.  y  /\  [
z  /  x ] ph )  ->  t  e.  z )  <->  A. z
( [ z  /  x ] ( x  e.  y  /\  ph )  ->  t  e.  z ) )
1810, 17bitri 182 . . . . . . 7  |-  ( A. z  e.  y  ( [ z  /  x ] ph  ->  t  e.  z )  <->  A. z
( [ z  /  x ] ( x  e.  y  /\  ph )  ->  t  e.  z ) )
19 df-clab 2068 . . . . . . . . . 10  |-  ( z  e.  { x  |  ( x  e.  y  /\  ph ) }  <->  [ z  /  x ] ( x  e.  y  /\  ph )
)
2019bicomi 130 . . . . . . . . 9  |-  ( [ z  /  x ]
( x  e.  y  /\  ph )  <->  z  e.  { x  |  ( x  e.  y  /\  ph ) } )
2120imbi1i 236 . . . . . . . 8  |-  ( ( [ z  /  x ] ( x  e.  y  /\  ph )  ->  t  e.  z )  <-> 
( z  e.  {
x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z ) )
2221albii 1399 . . . . . . 7  |-  ( A. z ( [ z  /  x ] ( x  e.  y  /\  ph )  ->  t  e.  z )  <->  A. z
( z  e.  {
x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z ) )
2318, 22bitri 182 . . . . . 6  |-  ( A. z  e.  y  ( [ z  /  x ] ph  ->  t  e.  z )  <->  A. z
( z  e.  {
x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z ) )
245, 23bd0 10615 . . . . 5  |- BOUNDED  A. z ( z  e.  { x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z )
2524bdcab 10640 . . . 4  |- BOUNDED  { t  |  A. z ( z  e. 
{ x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z ) }
26 df-int 3637 . . . 4  |-  |^| { x  |  ( x  e.  y  /\  ph ) }  =  { t  |  A. z ( z  e.  { x  |  ( x  e.  y  /\  ph ) }  ->  t  e.  z ) }
2725, 26bdceqir 10635 . . 3  |- BOUNDED 
|^| { x  |  ( x  e.  y  /\  ph ) }
28 bdcriota.ex . . . . 5  |-  E! x  e.  y  ph
29 df-reu 2355 . . . . 5  |-  ( E! x  e.  y  ph  <->  E! x ( x  e.  y  /\  ph )
)
3028, 29mpbi 143 . . . 4  |-  E! x
( x  e.  y  /\  ph )
31 iotaint 4900 . . . 4  |-  ( E! x ( x  e.  y  /\  ph )  ->  ( iota x ( x  e.  y  /\  ph ) )  =  |^| { x  |  ( x  e.  y  /\  ph ) } )
3230, 31ax-mp 7 . . 3  |-  ( iota
x ( x  e.  y  /\  ph )
)  =  |^| { x  |  ( x  e.  y  /\  ph ) }
3327, 32bdceqir 10635 . 2  |- BOUNDED  ( iota x ( x  e.  y  /\  ph ) )
34 df-riota 5488 . 2  |-  ( iota_ x  e.  y  ph )  =  ( iota x
( x  e.  y  /\  ph ) )
3533, 34bdceqir 10635 1  |- BOUNDED  ( iota_ x  e.  y 
ph )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 102   A.wal 1282    = wceq 1284    e. wcel 1433   [wsb 1685   E!weu 1941   {cab 2067   A.wral 2348   E!wreu 2350   |^|cint 3636   iotacio 4885   iota_crio 5487  BOUNDED wbd 10603  BOUNDED wbdc 10631
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-bd0 10604  ax-bdim 10605  ax-bdal 10609  ax-bdel 10612  ax-bdsb 10613
This theorem depends on definitions:  df-bi 115  df-tru 1287  df-nf 1390  df-sb 1686  df-eu 1944  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-rex 2354  df-reu 2355  df-v 2603  df-sbc 2816  df-un 2977  df-in 2979  df-sn 3404  df-pr 3405  df-uni 3602  df-int 3637  df-iota 4887  df-riota 5488  df-bdc 10632
This theorem is referenced by: (None)
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