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| Mirrors > Home > ILE Home > Th. List > nninfinfwlpolem | GIF version | ||
| Description: Lemma for nninfinfwlpo 7335. (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 2236 | . . . 4 ⊢ (𝑥 = 𝐺 → (𝑥 = (𝑖 ∈ ω ↦ 1o) ↔ 𝐺 = (𝑖 ∈ ω ↦ 1o))) | |
| 2 | 1 | dcbid 843 | . . 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 7330 | . . 3 ⊢ (𝜑 → 𝐺 ∈ ℕ∞) |
| 7 | 2, 3, 6 | rspcdva 2912 | . 2 ⊢ (𝜑 → DECID 𝐺 = (𝑖 ∈ ω ↦ 1o)) |
| 8 | 4, 5 | nninfwlpoimlemginf 7331 | . . 3 ⊢ (𝜑 → (𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 9 | 8 | dcbid 843 | . 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 839 = wceq 1395 ∀wral 2508 ∃wrex 2509 ∅c0 3491 ifcif 3602 ↦ cmpt 4144 suc csuc 4453 ωcom 4679 ⟶wf 5310 ‘cfv 5314 1oc1o 6545 2oc2o 6546 ℕ∞xnninf 7274 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4198 ax-sep 4201 ax-nul 4209 ax-pow 4257 ax-pr 4292 ax-un 4521 ax-setind 4626 ax-iinf 4677 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-if 3603 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-int 3923 df-iun 3966 df-br 4083 df-opab 4145 df-mpt 4146 df-tr 4182 df-id 4381 df-iord 4454 df-on 4456 df-suc 4459 df-iom 4680 df-xp 4722 df-rel 4723 df-cnv 4724 df-co 4725 df-dm 4726 df-rn 4727 df-res 4728 df-ima 4729 df-iota 5274 df-fun 5316 df-fn 5317 df-f 5318 df-f1 5319 df-fo 5320 df-f1o 5321 df-fv 5322 df-ov 5997 df-oprab 5998 df-mpo 5999 df-1o 6552 df-2o 6553 df-er 6670 df-map 6787 df-en 6878 df-fin 6880 df-nninf 7275 |
| This theorem is referenced by: nninfinfwlpo 7335 |
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