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| Mirrors > Home > ILE Home > Th. List > tfrfun | GIF version | ||
| Description: Transfinite recursion produces a function. (Contributed by Jim Kingdon, 20-Aug-2021.) |
| Ref | Expression |
|---|---|
| tfrfun | ⊢ Fun recs(𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2232 | . 2 ⊢ {𝑓 ∣ ∃𝑥 ∈ On (𝑓 Fn 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑓‘𝑦) = (𝐹‘(𝑓 ↾ 𝑦)))} = {𝑓 ∣ ∃𝑥 ∈ On (𝑓 Fn 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑓‘𝑦) = (𝐹‘(𝑓 ↾ 𝑦)))} | |
| 2 | 1 | tfrlem7 6548 | 1 ⊢ Fun recs(𝐹) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 = wceq 1398 {cab 2218 ∀wral 2520 ∃wrex 2521 Oncon0 4484 ↾ cres 4751 Fun wfun 5346 Fn wfn 5347 ‘cfv 5352 recscrecs 6535 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-setind 4659 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-sbc 3043 df-csb 3139 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-iun 3993 df-br 4110 df-opab 4172 df-mpt 4173 df-tr 4209 df-id 4414 df-iord 4487 df-on 4489 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-res 4761 df-iota 5312 df-fun 5354 df-fn 5355 df-fv 5360 df-recs 6536 |
| This theorem is referenced by: tfr1onlembfn 6575 tfr1onlemubacc 6577 tfri1dALT 6582 tfrcllembfn 6588 tfrcllemubacc 6590 tfrcl 6595 frecex 6625 frecfun 6626 frecfcllem 6635 frecsuclem 6637 |
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