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Theorem rdgfun 6341
Description: The recursive definition generator is a function. (Contributed by Mario Carneiro, 16-Nov-2014.)
Assertion
Ref Expression
rdgfun  |-  Fun  rec ( F ,  A )

Proof of Theorem rdgfun
Dummy variables  x  y  z  f  g are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2165 . . 3  |-  { f  |  E. y  e.  On  ( f  Fn  y  /\  A. z  e.  y  ( f `  z )  =  ( ( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) `  ( f  |`  z ) ) ) }  =  { f  |  E. y  e.  On  ( f  Fn  y  /\  A. z  e.  y  ( f `  z )  =  ( ( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) `  ( f  |`  z ) ) ) }
21tfrlem7 6285 . 2  |-  Fun recs (
( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) )
3 df-irdg 6338 . . 3  |-  rec ( F ,  A )  = recs ( ( g  e. 
_V  |->  ( A  u.  U_ x  e.  dom  g
( F `  (
g `  x )
) ) ) )
43funeqi 5209 . 2  |-  ( Fun 
rec ( F ,  A )  <->  Fun recs ( ( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) ) )
52, 4mpbir 145 1  |-  Fun  rec ( F ,  A )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1343   {cab 2151   A.wral 2444   E.wrex 2445   _Vcvv 2726    u. cun 3114   U_ciun 3866    |-> cmpt 4043   Oncon0 4341   dom cdm 4604    |` cres 4606   Fun wfun 5182    Fn wfn 5183   ` cfv 5188  recscrecs 6272   reccrdg 6337
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-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187  ax-setind 4514
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-tr 4081  df-id 4271  df-iord 4344  df-on 4346  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-res 4616  df-iota 5153  df-fun 5190  df-fn 5191  df-fv 5196  df-recs 6273  df-irdg 6338
This theorem is referenced by:  rdgivallem  6349
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