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Theorem rdgfun 6426
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 2193 . . 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 6370 . 2  |-  Fun recs (
( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) )
3 df-irdg 6423 . . 3  |-  rec ( F ,  A )  = recs ( ( g  e. 
_V  |->  ( A  u.  U_ x  e.  dom  g
( F `  (
g `  x )
) ) ) )
43funeqi 5275 . 2  |-  ( Fun 
rec ( F ,  A )  <->  Fun recs ( ( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) ) )
52, 4mpbir 146 1  |-  Fun  rec ( F ,  A )
Colors of variables: wff set class
Syntax hints:    /\ wa 104    = wceq 1364   {cab 2179   A.wral 2472   E.wrex 2473   _Vcvv 2760    u. cun 3151   U_ciun 3912    |-> cmpt 4090   Oncon0 4394   dom cdm 4659    |` cres 4661   Fun wfun 5248    Fn wfn 5249   ` cfv 5254  recscrecs 6357   reccrdg 6422
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-setind 4569
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-rab 2481  df-v 2762  df-sbc 2986  df-csb 3081  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-iun 3914  df-br 4030  df-opab 4091  df-mpt 4092  df-tr 4128  df-id 4324  df-iord 4397  df-on 4399  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-res 4671  df-iota 5215  df-fun 5256  df-fn 5257  df-fv 5262  df-recs 6358  df-irdg 6423
This theorem is referenced by:  rdgivallem  6434
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