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| Mirrors > Home > ILE Home > Th. List > nninfinfwlpolem | GIF version | ||
| Description: Lemma for nninfinfwlpo 7422. (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 846 | . . 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 7417 | . . 3 ⊢ (𝜑 → 𝐺 ∈ ℕ∞) |
| 7 | 2, 3, 6 | rspcdva 2916 | . 2 ⊢ (𝜑 → DECID 𝐺 = (𝑖 ∈ ω ↦ 1o)) |
| 8 | 4, 5 | nninfwlpoimlemginf 7418 | . . 3 ⊢ (𝜑 → (𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 9 | 8 | dcbid 846 | . 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 842 = wceq 1398 ∀wral 2511 ∃wrex 2512 ∅c0 3496 ifcif 3607 ↦ cmpt 4155 suc csuc 4468 ωcom 4694 ⟶wf 5329 ‘cfv 5333 1oc1o 6618 2oc2o 6619 ℕ∞xnninf 7361 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-iinf 4692 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-ral 2516 df-rex 2517 df-reu 2518 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-if 3608 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-tr 4193 df-id 4396 df-iord 4469 df-on 4471 df-suc 4474 df-iom 4695 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-ov 6031 df-oprab 6032 df-mpo 6033 df-1o 6625 df-2o 6626 df-er 6745 df-map 6862 df-en 6953 df-fin 6955 df-nninf 7362 |
| This theorem is referenced by: nninfinfwlpo 7422 |
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