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Theorem rdgfun 6538
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 2231 . . 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 6482 . 2  |-  Fun recs (
( g  e.  _V  |->  ( A  u.  U_ x  e.  dom  g ( F `
 ( g `  x ) ) ) ) )
3 df-irdg 6535 . . 3  |-  rec ( F ,  A )  = recs ( ( g  e. 
_V  |->  ( A  u.  U_ x  e.  dom  g
( F `  (
g `  x )
) ) ) )
43funeqi 5347 . 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 1397   {cab 2217   A.wral 2510   E.wrex 2511   _Vcvv 2802    u. cun 3198   U_ciun 3970    |-> cmpt 4150   Oncon0 4460   dom cdm 4725    |` cres 4727   Fun wfun 5320    Fn wfn 5321   ` cfv 5326  recscrecs 6469   reccrdg 6534
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-setind 4635
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-id 4390  df-iord 4463  df-on 4465  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-recs 6470  df-irdg 6535
This theorem is referenced by:  rdgivallem  6546
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