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| Mirrors > Home > ILE Home > Th. List > nninfinfwlpolem | GIF version | ||
| Description: Lemma for nninfinfwlpo 7289. (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 2213 | . . . 4 ⊢ (𝑥 = 𝐺 → (𝑥 = (𝑖 ∈ ω ↦ 1o) ↔ 𝐺 = (𝑖 ∈ ω ↦ 1o))) | |
| 2 | 1 | dcbid 840 | . . 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 7284 | . . 3 ⊢ (𝜑 → 𝐺 ∈ ℕ∞) |
| 7 | 2, 3, 6 | rspcdva 2883 | . 2 ⊢ (𝜑 → DECID 𝐺 = (𝑖 ∈ ω ↦ 1o)) |
| 8 | 4, 5 | nninfwlpoimlemginf 7285 | . . 3 ⊢ (𝜑 → (𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 9 | 8 | dcbid 840 | . 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 836 = wceq 1373 ∀wral 2485 ∃wrex 2486 ∅c0 3461 ifcif 3572 ↦ cmpt 4109 suc csuc 4416 ωcom 4642 ⟶wf 5272 ‘cfv 5276 1oc1o 6502 2oc2o 6503 ℕ∞xnninf 7228 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4163 ax-sep 4166 ax-nul 4174 ax-pow 4222 ax-pr 4257 ax-un 4484 ax-setind 4589 ax-iinf 4640 |
| This theorem depends on definitions: df-bi 117 df-dc 837 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3000 df-csb 3095 df-dif 3169 df-un 3171 df-in 3173 df-ss 3180 df-nul 3462 df-if 3573 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-int 3888 df-iun 3931 df-br 4048 df-opab 4110 df-mpt 4111 df-tr 4147 df-id 4344 df-iord 4417 df-on 4419 df-suc 4422 df-iom 4643 df-xp 4685 df-rel 4686 df-cnv 4687 df-co 4688 df-dm 4689 df-rn 4690 df-res 4691 df-ima 4692 df-iota 5237 df-fun 5278 df-fn 5279 df-f 5280 df-f1 5281 df-fo 5282 df-f1o 5283 df-fv 5284 df-ov 5954 df-oprab 5955 df-mpo 5956 df-1o 6509 df-2o 6510 df-er 6627 df-map 6744 df-en 6835 df-fin 6837 df-nninf 7229 |
| This theorem is referenced by: nninfinfwlpo 7289 |
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