| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > nninfinfwlpolem | GIF version | ||
| Description: Lemma for nninfinfwlpo 7526. (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 2245 | . . . 4 ⊢ (𝑥 = 𝐺 → (𝑥 = (𝑖 ∈ ω ↦ 1o) ↔ 𝐺 = (𝑖 ∈ ω ↦ 1o))) | |
| 2 | 1 | dcbid 850 | . . 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 7521 | . . 3 ⊢ (𝜑 → 𝐺 ∈ ℕ∞) |
| 7 | 2, 3, 6 | rspcdva 2934 | . 2 ⊢ (𝜑 → DECID 𝐺 = (𝑖 ∈ ω ↦ 1o)) |
| 8 | 4, 5 | nninfwlpoimlemginf 7522 | . . 3 ⊢ (𝜑 → (𝐺 = (𝑖 ∈ ω ↦ 1o) ↔ ∀𝑛 ∈ ω (𝐹‘𝑛) = 1o)) |
| 9 | 8 | dcbid 850 | . 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 |
| This proof depends on syntax axioms: → wi 4 DECID wdc 846 = wceq 1402 ∀wral 2528 ∃wrex 2529 ∅c0 3520 ifcif 3638 ↦ cmpt 4193 suc csuc 4512 ωcom 4739 ⟶wf 5376 ‘cfv 5380 1oc1o 6684 2oc2o 6685 ℕ∞xnninf 7465 |
| This proof depends on 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 4248 ax-sep 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-iinf 4737 |
| This proof depends on definitions: df-bi 117 df-dc 847 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-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4132 df-opab 4194 df-mpt 4195 df-tr 4232 df-id 4440 df-iord 4513 df-on 4515 df-suc 4518 df-iom 4740 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-ov 6091 df-oprab 6092 df-mpo 6093 df-1o 6691 df-2o 6692 df-er 6811 df-map 6928 df-en 7027 df-fin 7029 df-nninf 7466 |
| This theorem is used by: nninfinfwlpo 7526 |
| Copyright terms: Public domain | W3C validator |