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Theorem tfrex 5954
Description: The transfinite recursion function is set-like if the input is. (Contributed by Mario Carneiro, 3-Jul-2019.)
Hypotheses
Ref Expression
tfrex.1  |-  F  = recs ( G )
tfrex.2  |-  ( ph  ->  A. x ( Fun 
G  /\  ( G `  x )  e.  _V ) )
Assertion
Ref Expression
tfrex  |-  ( (
ph  /\  A  e.  V )  ->  ( F `  A )  e.  _V )
Distinct variable group:    x, G
Allowed substitution hints:    ph( x)    A( x)    F( x)    V( x)

Proof of Theorem tfrex
Dummy variables  f  g  u  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 tfrex.1 . . 3  |-  F  = recs ( G )
21fveq1i 5179 . 2  |-  ( F `
 A )  =  (recs ( G ) `
 A )
3 eqid 2040 . . . 4  |-  { g  |  E. z  e.  On  ( g  Fn  z  /\  A. u  e.  z  ( g `  u )  =  ( G `  ( g  |`  u ) ) ) }  =  { g  |  E. z  e.  On  ( g  Fn  z  /\  A. u  e.  z  ( g `  u )  =  ( G `  ( g  |`  u ) ) ) }
43tfrlem3 5926 . . 3  |-  { g  |  E. z  e.  On  ( g  Fn  z  /\  A. u  e.  z  ( g `  u )  =  ( G `  ( g  |`  u ) ) ) }  =  { f  |  E. x  e.  On  ( f  Fn  x  /\  A. y  e.  x  ( f `  y )  =  ( G `  ( f  |`  y ) ) ) }
5 tfrex.2 . . 3  |-  ( ph  ->  A. x ( Fun 
G  /\  ( G `  x )  e.  _V ) )
64, 5tfrexlem 5948 . 2  |-  ( (
ph  /\  A  e.  V )  ->  (recs ( G ) `  A
)  e.  _V )
72, 6syl5eqel 2124 1  |-  ( (
ph  /\  A  e.  V )  ->  ( F `  A )  e.  _V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 97   A.wal 1241    = wceq 1243    e. wcel 1393   {cab 2026   A.wral 2306   E.wrex 2307   _Vcvv 2557   Oncon0 4100    |` cres 4347   Fun wfun 4896    Fn wfn 4897   ` cfv 4902  recscrecs 5919
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-13 1404  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-coll 3872  ax-sep 3875  ax-pow 3927  ax-pr 3944  ax-un 4170  ax-setind 4262
This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-fal 1249  df-nf 1350  df-sb 1646  df-eu 1903  df-mo 1904  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ne 2206  df-ral 2311  df-rex 2312  df-reu 2313  df-rab 2315  df-v 2559  df-sbc 2765  df-csb 2853  df-dif 2920  df-un 2922  df-in 2924  df-ss 2931  df-nul 3225  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-iun 3659  df-br 3765  df-opab 3819  df-mpt 3820  df-tr 3855  df-id 4030  df-iord 4103  df-on 4105  df-suc 4108  df-xp 4351  df-rel 4352  df-cnv 4353  df-co 4354  df-dm 4355  df-rn 4356  df-res 4357  df-ima 4358  df-iota 4867  df-fun 4904  df-fn 4905  df-f 4906  df-f1 4907  df-fo 4908  df-f1o 4909  df-fv 4910  df-recs 5920
This theorem is referenced by:  rdgexggg  5964
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