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Mirrors > Home > MPE Home > Th. List > rdgsucg | Structured version Visualization version GIF version |
Description: The value of the recursive definition generator at a successor. (Contributed by NM, 16-Nov-2014.) |
Ref | Expression |
---|---|
rdgsucg | ⊢ (𝐵 ∈ dom rec(𝐹, 𝐴) → (rec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘(rec(𝐹, 𝐴)‘𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rdgdmlim 8248 | . . 3 ⊢ Lim dom rec(𝐹, 𝐴) | |
2 | limsuc 7696 | . . 3 ⊢ (Lim dom rec(𝐹, 𝐴) → (𝐵 ∈ dom rec(𝐹, 𝐴) ↔ suc 𝐵 ∈ dom rec(𝐹, 𝐴))) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ (𝐵 ∈ dom rec(𝐹, 𝐴) ↔ suc 𝐵 ∈ dom rec(𝐹, 𝐴)) |
4 | eqid 2738 | . . 3 ⊢ (𝑥 ∈ V ↦ if(𝑥 = ∅, 𝐴, if(Lim dom 𝑥, ∪ ran 𝑥, (𝐹‘(𝑥‘∪ dom 𝑥))))) = (𝑥 ∈ V ↦ if(𝑥 = ∅, 𝐴, if(Lim dom 𝑥, ∪ ran 𝑥, (𝐹‘(𝑥‘∪ dom 𝑥))))) | |
5 | rdgvalg 8250 | . . 3 ⊢ (𝑦 ∈ dom rec(𝐹, 𝐴) → (rec(𝐹, 𝐴)‘𝑦) = ((𝑥 ∈ V ↦ if(𝑥 = ∅, 𝐴, if(Lim dom 𝑥, ∪ ran 𝑥, (𝐹‘(𝑥‘∪ dom 𝑥)))))‘(rec(𝐹, 𝐴) ↾ 𝑦))) | |
6 | rdgseg 8253 | . . 3 ⊢ (𝑦 ∈ dom rec(𝐹, 𝐴) → (rec(𝐹, 𝐴) ↾ 𝑦) ∈ V) | |
7 | rdgfun 8247 | . . . 4 ⊢ Fun rec(𝐹, 𝐴) | |
8 | funfn 6464 | . . . 4 ⊢ (Fun rec(𝐹, 𝐴) ↔ rec(𝐹, 𝐴) Fn dom rec(𝐹, 𝐴)) | |
9 | 7, 8 | mpbi 229 | . . 3 ⊢ rec(𝐹, 𝐴) Fn dom rec(𝐹, 𝐴) |
10 | limord 6325 | . . . 4 ⊢ (Lim dom rec(𝐹, 𝐴) → Ord dom rec(𝐹, 𝐴)) | |
11 | 1, 10 | ax-mp 5 | . . 3 ⊢ Ord dom rec(𝐹, 𝐴) |
12 | 4, 5, 6, 9, 11 | tz7.44-2 8238 | . 2 ⊢ (suc 𝐵 ∈ dom rec(𝐹, 𝐴) → (rec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘(rec(𝐹, 𝐴)‘𝐵))) |
13 | 3, 12 | sylbi 216 | 1 ⊢ (𝐵 ∈ dom rec(𝐹, 𝐴) → (rec(𝐹, 𝐴)‘suc 𝐵) = (𝐹‘(rec(𝐹, 𝐴)‘𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2106 Vcvv 3432 ∅c0 4256 ifcif 4459 ∪ cuni 4839 ↦ cmpt 5157 dom cdm 5589 ran crn 5590 Ord word 6265 Lim wlim 6267 suc csuc 6268 Fun wfun 6427 Fn wfn 6428 ‘cfv 6433 reccrdg 8240 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 |
This theorem is referenced by: rdgsuc 8255 rdgsucmptnf 8260 frsuc 8268 r1sucg 9527 |
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