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Theorem tfr0 6584
Description: Transfinite recursion at the empty set. (Contributed by Jim Kingdon, 8-May-2020.)
Hypothesis
Ref Expression
tfr.1  |-  F  = recs ( G )
Assertion
Ref Expression
tfr0  |-  ( ( G `  (/) )  e.  V  ->  ( F `  (/) )  =  ( G `  (/) ) )

Proof of Theorem tfr0
StepHypRef Expression
1 tfr.1 . . . 4  |-  F  = recs ( G )
21tfr0dm 6583 . . 3  |-  ( ( G `  (/) )  e.  V  ->  (/)  e.  dom  F )
31tfr2a 6582 . . 3  |-  ( (/)  e.  dom  F  ->  ( F `  (/) )  =  ( G `  ( F  |`  (/) ) ) )
42, 3syl 14 . 2  |-  ( ( G `  (/) )  e.  V  ->  ( F `  (/) )  =  ( G `  ( F  |`  (/) ) ) )
5 res0 5062 . . 3  |-  ( F  |`  (/) )  =  (/)
65fveq2i 5693 . 2  |-  ( G `
 ( F  |`  (/) ) )  =  ( G `  (/) )
74, 6eqtrdi 2287 1  |-  ( ( G `  (/) )  e.  V  ->  ( F `  (/) )  =  ( G `  (/) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1402    e. wcel 2209   (/)c0 3520   dom cdm 4769    |` cres 4771   ` cfv 5372  recscrecs 6565
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-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-suc 4511  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-res 4781  df-iota 5332  df-fun 5374  df-fn 5375  df-fv 5380  df-recs 6566
This theorem is referenced by:  rdg0  6648  frec0g  6658
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