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Theorem tfr1ALT 8387
Description: Alternate proof of tfr1 8384 using well-ordered recursion. (Contributed by Scott Fenton, 3-Aug-2020.) (New usage is discouraged.) (Proof modification is discouraged.)
Hypothesis
Ref Expression
tfrALT.1 𝐹 = recs(𝐺)
Assertion
Ref Expression
tfr1ALT 𝐹 Fn On

Proof of Theorem tfr1ALT
StepHypRef Expression
1 epweon 7774 . 2 E We On
2 epse 5644 . 2 E Se On
3 tfrALT.1 . . . 4 𝐹 = recs(𝐺)
4 df-recs 8358 . . . 4 recs(𝐺) = wrecs( E , On, 𝐺)
53, 4eqtri 2792 . . 3 𝐹 = wrecs( E , On, 𝐺)
65wfr1 8323 . 2 (( E We On ∧ E Se On) → 𝐹 Fn On)
71, 2, 6mp2an 704 1 𝐹 Fn On
Colors of variables: wff setvar class
Syntax hints:   = wceq 1567   E cep 5561   Se wse 5613   We wwe 5614  Oncon0 6361   Fn wfn 6532  wrecscwrecs 8308  recscrecs 8357
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-rep 5242  ax-sep 5261  ax-nul 5271  ax-pr 5405  ax-un 7733
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-reu 3377  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-pss 3933  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-iun 4962  df-br 5114  df-opab 5178  df-mpt 5197  df-tr 5223  df-id 5557  df-eprel 5562  df-po 5570  df-so 5571  df-fr 5615  df-se 5616  df-we 5617  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-res 5674  df-ima 5675  df-pred 6303  df-ord 6364  df-on 6365  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-ov 7414  df-frecs 8278  df-wrecs 8309  df-recs 8358
This theorem is referenced by: (None)
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