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| Mirrors > Home > ILE Home > Th. List > nninfinfwlpolem | GIF version | ||
| Description: Lemma for nninfinfwlpo 7378. (Contributed by Jim Kingdon, 8-Dec-2024.) |
| Ref | Expression |
|---|---|
| nninfwlpoimlemg.f | ⊢ (𝜑 → 𝐹:ω⟶2o) |
| nninfwlpoimlemg.g | ⊢ 𝐺 = (𝑖 ∈ ω ↦ if(∃𝑥 ∈ suc 𝑖(𝐹‘𝑥) = ∅, ∅, 1o)) |
| nninfinfwlpoimlem.eq | ⊢ (𝜑 → ∀𝑥 ∈ ℕ∞ DECID 𝑥 = (𝑖 ∈ ω ↦ 1o)) |
| Ref | Expression |
|---|---|
| nninfinfwlpolem | ⊢ (𝜑 → DECID ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1 2238 | . . . 4 ⊢ (𝑥 = 𝐺 → (𝑥 = (𝑖 ∈ ω ↦ 1o) ↔ 𝐺 = (𝑖 ∈ ω ↦ 1o))) | |
| 2 | 1 | dcbid 845 | . . 3 ⊢ (𝑥 = 𝐺 → (DECID 𝑥 = (𝑖 ∈ ω ↦ 1o) ↔ DECID 𝐺 = (𝑖 ∈ ω ↦ 1o))) |
| 3 | nninfinfwlpoimlem.eq | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ ℕ∞ DECID 𝑥 = (𝑖 ∈ ω ↦ 1o)) | |
| 4 | nninfwlpoimlemg.f | . . . 4 ⊢ (𝜑 → 𝐹:ω⟶2o) | |
| 5 | nninfwlpoimlemg.g | . . . 4 ⊢ 𝐺 = (𝑖 ∈ ω ↦ if(∃𝑥 ∈ suc 𝑖(𝐹‘𝑥) = ∅, ∅, 1o)) | |
| 6 | 4, 5 | nninfwlpoimlemg 7373 | . . 3 ⊢ (𝜑 → 𝐺 ∈ ℕ∞) |
| 7 | 2, 3, 6 | rspcdva 2915 | . 2 ⊢ (𝜑 → DECID 𝐺 = (𝑖 ∈ ω ↦ 1o)) |
| 8 | 4, 5 | nninfwlpoimlemginf 7374 | . . 3 ⊢ (𝜑 → (𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 9 | 8 | dcbid 845 | . 2 ⊢ (𝜑 → (DECID 𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ DECID ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 10 | 7, 9 | mpbid 147 | 1 ⊢ (𝜑 → DECID ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 DECID wdc 841 = wceq 1397 ∀wral 2510 ∃wrex 2511 ∅c0 3494 ifcif 3605 ↦ cmpt 4150 suc csuc 4462 ωcom 4688 ⟶wf 5322 ‘cfv 5326 1oc1o 6574 2oc2o 6575 ℕ∞xnninf 7317 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 |
| This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-iord 4463 df-on 4465 df-suc 4468 df-iom 4689 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-ov 6020 df-oprab 6021 df-mpo 6022 df-1o 6581 df-2o 6582 df-er 6701 df-map 6818 df-en 6909 df-fin 6911 df-nninf 7318 |
| This theorem is referenced by: nninfinfwlpo 7378 |
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