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Mirrors > Home > ILE Home > Th. List > rdgfun | GIF version |
Description: The recursive definition generator is a function. (Contributed by Mario Carneiro, 16-Nov-2014.) |
Ref | Expression |
---|---|
rdgfun | ⊢ Fun rec(𝐹, 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2165 | . . 3 ⊢ {𝑓 ∣ ∃𝑦 ∈ On (𝑓 Fn 𝑦 ∧ ∀𝑧 ∈ 𝑦 (𝑓‘𝑧) = ((𝑔 ∈ V ↦ (𝐴 ∪ ∪ 𝑥 ∈ dom 𝑔(𝐹‘(𝑔‘𝑥))))‘(𝑓 ↾ 𝑧)))} = {𝑓 ∣ ∃𝑦 ∈ On (𝑓 Fn 𝑦 ∧ ∀𝑧 ∈ 𝑦 (𝑓‘𝑧) = ((𝑔 ∈ V ↦ (𝐴 ∪ ∪ 𝑥 ∈ dom 𝑔(𝐹‘(𝑔‘𝑥))))‘(𝑓 ↾ 𝑧)))} | |
2 | 1 | tfrlem7 6285 | . 2 ⊢ Fun recs((𝑔 ∈ V ↦ (𝐴 ∪ ∪ 𝑥 ∈ dom 𝑔(𝐹‘(𝑔‘𝑥))))) |
3 | df-irdg 6338 | . . 3 ⊢ rec(𝐹, 𝐴) = recs((𝑔 ∈ V ↦ (𝐴 ∪ ∪ 𝑥 ∈ dom 𝑔(𝐹‘(𝑔‘𝑥))))) | |
4 | 3 | funeqi 5209 | . 2 ⊢ (Fun rec(𝐹, 𝐴) ↔ Fun recs((𝑔 ∈ V ↦ (𝐴 ∪ ∪ 𝑥 ∈ dom 𝑔(𝐹‘(𝑔‘𝑥)))))) |
5 | 2, 4 | mpbir 145 | 1 ⊢ Fun rec(𝐹, 𝐴) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 = wceq 1343 {cab 2151 ∀wral 2444 ∃wrex 2445 Vcvv 2726 ∪ cun 3114 ∪ ciun 3866 ↦ cmpt 4043 Oncon0 4341 dom cdm 4604 ↾ cres 4606 Fun wfun 5182 Fn wfn 5183 ‘cfv 5188 recscrecs 6272 reccrdg 6337 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-iord 4344 df-on 4346 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-res 4616 df-iota 5153 df-fun 5190 df-fn 5191 df-fv 5196 df-recs 6273 df-irdg 6338 |
This theorem is referenced by: rdgivallem 6349 |
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