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| Mirrors > Home > ILE Home > Th. List > frec2uzsucd | GIF version | ||
| Description: The value of 𝐺 (see frec2uz0d 10819) at a successor. (Contributed by Jim Kingdon, 16-May-2020.) |
| Ref | Expression |
|---|---|
| frec2uz.1 | ⊢ (𝜑 → 𝐶 ∈ ℤ) |
| frec2uz.2 | ⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶) |
| frec2uzzd.a | ⊢ (𝜑 → 𝐴 ∈ ω) |
| Ref | Expression |
|---|---|
| frec2uzsucd | ⊢ (𝜑 → (𝐺‘suc 𝐴) = ((𝐺‘𝐴) + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | peano2z 9663 | . . . . . . 7 ⊢ (𝑧 ∈ ℤ → (𝑧 + 1) ∈ ℤ) | |
| 2 | oveq1 6086 | . . . . . . . 8 ⊢ (𝑥 = 𝑧 → (𝑥 + 1) = (𝑧 + 1)) | |
| 3 | eqid 2238 | . . . . . . . 8 ⊢ (𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑥 ∈ ℤ ↦ (𝑥 + 1)) | |
| 4 | 2, 3 | fvmptg 5778 | . . . . . . 7 ⊢ ((𝑧 ∈ ℤ ∧ (𝑧 + 1) ∈ ℤ) → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑧) = (𝑧 + 1)) |
| 5 | 1, 4 | mpdan 425 | . . . . . 6 ⊢ (𝑧 ∈ ℤ → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑧) = (𝑧 + 1)) |
| 6 | 5, 1 | eqeltrd 2315 | . . . . 5 ⊢ (𝑧 ∈ ℤ → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑧) ∈ ℤ) |
| 7 | 6 | rgen 2603 | . . . 4 ⊢ ∀𝑧 ∈ ℤ ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑧) ∈ ℤ |
| 8 | frec2uz.1 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℤ) | |
| 9 | frec2uzzd.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ω) | |
| 10 | frecsuc 6672 | . . . 4 ⊢ ((∀𝑧 ∈ ℤ ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘𝑧) ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ∈ ω) → (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘suc 𝐴) = ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴))) | |
| 11 | 7, 8, 9, 10 | mp3an2i 1383 | . . 3 ⊢ (𝜑 → (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘suc 𝐴) = ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴))) |
| 12 | frec2uz.2 | . . . 4 ⊢ 𝐺 = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶) | |
| 13 | 12 | fveq1i 5694 | . . 3 ⊢ (𝐺‘suc 𝐴) = (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘suc 𝐴) |
| 14 | 12 | fveq1i 5694 | . . . 4 ⊢ (𝐺‘𝐴) = (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴) |
| 15 | 14 | fveq2i 5696 | . . 3 ⊢ ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(𝐺‘𝐴)) = ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 𝐶)‘𝐴)) |
| 16 | 11, 13, 15 | 3eqtr4g 2296 | . 2 ⊢ (𝜑 → (𝐺‘suc 𝐴) = ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(𝐺‘𝐴))) |
| 17 | 8, 12, 9 | frec2uzzd 10820 | . . 3 ⊢ (𝜑 → (𝐺‘𝐴) ∈ ℤ) |
| 18 | oveq1 6086 | . . . 4 ⊢ (𝑧 = (𝐺‘𝐴) → (𝑧 + 1) = ((𝐺‘𝐴) + 1)) | |
| 19 | 2 | cbvmptv 4225 | . . . 4 ⊢ (𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑧 ∈ ℤ ↦ (𝑧 + 1)) |
| 20 | 18, 19, 1 | fvmpt3 5781 | . . 3 ⊢ ((𝐺‘𝐴) ∈ ℤ → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(𝐺‘𝐴)) = ((𝐺‘𝐴) + 1)) |
| 21 | 17, 20 | syl 14 | . 2 ⊢ (𝜑 → ((𝑥 ∈ ℤ ↦ (𝑥 + 1))‘(𝐺‘𝐴)) = ((𝐺‘𝐴) + 1)) |
| 22 | 16, 21 | eqtrd 2271 | 1 ⊢ (𝜑 → (𝐺‘suc 𝐴) = ((𝐺‘𝐴) + 1)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 ∀wral 2528 ↦ cmpt 4190 suc csuc 4508 ωcom 4735 ‘cfv 5375 (class class class)co 6079 freccfrec 6655 1c1 8174 + caddc 8176 ℤcz 9627 |
| 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-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-addcom 8273 ax-addass 8275 ax-distr 8277 ax-i2m1 8278 ax-0id 8281 ax-rnegex 8282 ax-cnre 8284 |
| This theorem depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-iord 4509 df-on 4511 df-ilim 4512 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-recs 6570 df-frec 6656 df-sub 8493 df-neg 8494 df-inn 9288 df-n0 9547 df-z 9628 |
| This theorem is referenced by: frec2uzuzd 10822 frec2uzltd 10823 frec2uzrand 10825 frec2uzrdg 10829 frecuzrdgsuc 10834 frecuzrdgg 10836 frecfzennn 10846 1tonninf 10861 omgadd 11225 ennnfonelemkh 13286 ennnfonelemhf1o 13287 ennnfonelemnn0 13296 012of 17006 2o01f 17007 isomninnlem 17053 iswomninnlem 17073 ismkvnnlem 17076 |
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