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Mirrors > Home > ILE Home > Th. List > rdgival | GIF version |
Description: Value of the recursive definition generator. (Contributed by Jim Kingdon, 26-Jul-2019.) |
Ref | Expression |
---|---|
rdgival | ⊢ ((𝐹 Fn V ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ On) → (rec(𝐹, 𝐴)‘𝐵) = (𝐴 ∪ ∪ 𝑥 ∈ 𝐵 (𝐹‘(rec(𝐹, 𝐴)‘𝑥)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rdgivallem 6349 | . 2 ⊢ ((𝐹 Fn V ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ On) → (rec(𝐹, 𝐴)‘𝐵) = (𝐴 ∪ ∪ 𝑥 ∈ 𝐵 (𝐹‘((rec(𝐹, 𝐴) ↾ 𝐵)‘𝑥)))) | |
2 | fvres 5510 | . . . . 5 ⊢ (𝑥 ∈ 𝐵 → ((rec(𝐹, 𝐴) ↾ 𝐵)‘𝑥) = (rec(𝐹, 𝐴)‘𝑥)) | |
3 | 2 | fveq2d 5490 | . . . 4 ⊢ (𝑥 ∈ 𝐵 → (𝐹‘((rec(𝐹, 𝐴) ↾ 𝐵)‘𝑥)) = (𝐹‘(rec(𝐹, 𝐴)‘𝑥))) |
4 | 3 | iuneq2i 3884 | . . 3 ⊢ ∪ 𝑥 ∈ 𝐵 (𝐹‘((rec(𝐹, 𝐴) ↾ 𝐵)‘𝑥)) = ∪ 𝑥 ∈ 𝐵 (𝐹‘(rec(𝐹, 𝐴)‘𝑥)) |
5 | 4 | uneq2i 3273 | . 2 ⊢ (𝐴 ∪ ∪ 𝑥 ∈ 𝐵 (𝐹‘((rec(𝐹, 𝐴) ↾ 𝐵)‘𝑥))) = (𝐴 ∪ ∪ 𝑥 ∈ 𝐵 (𝐹‘(rec(𝐹, 𝐴)‘𝑥))) |
6 | 1, 5 | eqtrdi 2215 | 1 ⊢ ((𝐹 Fn V ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ On) → (rec(𝐹, 𝐴)‘𝐵) = (𝐴 ∪ ∪ 𝑥 ∈ 𝐵 (𝐹‘(rec(𝐹, 𝐴)‘𝑥)))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 Vcvv 2726 ∪ cun 3114 ∪ ciun 3866 Oncon0 4341 ↾ cres 4606 Fn wfn 5183 ‘cfv 5188 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-in1 604 ax-in2 605 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-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 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-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 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-suc 4349 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-recs 6273 df-irdg 6338 |
This theorem is referenced by: rdgss 6351 rdgisuc1 6352 rdgisucinc 6353 oav2 6431 omv2 6433 |
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