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Mirrors > Home > ILE Home > Th. List > Mathboxes > nninfsel | GIF version |
Description: 𝐸 is a selection function for ℕ∞. Theorem 3.6 of [PradicBrown2022], p. 5. (Contributed by Jim Kingdon, 9-Aug-2022.) |
Ref | Expression |
---|---|
nninfsel.e | ⊢ 𝐸 = (𝑞 ∈ (2o ↑𝑚 ℕ∞) ↦ (𝑛 ∈ ω ↦ if(∀𝑘 ∈ suc 𝑛(𝑞‘(𝑖 ∈ ω ↦ if(𝑖 ∈ 𝑘, 1o, ∅))) = 1o, 1o, ∅))) |
nninfsel.q | ⊢ (𝜑 → 𝑄 ∈ (2o ↑𝑚 ℕ∞)) |
nninfsel.1 | ⊢ (𝜑 → (𝑄‘(𝐸‘𝑄)) = 1o) |
Ref | Expression |
---|---|
nninfsel | ⊢ (𝜑 → ∀𝑝 ∈ ℕ∞ (𝑄‘𝑝) = 1o) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nninfsel.q | . 2 ⊢ (𝜑 → 𝑄 ∈ (2o ↑𝑚 ℕ∞)) | |
2 | nninfsel.e | . . . . 5 ⊢ 𝐸 = (𝑞 ∈ (2o ↑𝑚 ℕ∞) ↦ (𝑛 ∈ ω ↦ if(∀𝑘 ∈ suc 𝑛(𝑞‘(𝑖 ∈ ω ↦ if(𝑖 ∈ 𝑘, 1o, ∅))) = 1o, 1o, ∅))) | |
3 | nninfsel.1 | . . . . 5 ⊢ (𝜑 → (𝑄‘(𝐸‘𝑄)) = 1o) | |
4 | 2, 1, 3 | nninfsellemeqinf 13758 | . . . 4 ⊢ (𝜑 → (𝐸‘𝑄) = (𝑖 ∈ ω ↦ 1o)) |
5 | 4 | fveq2d 5485 | . . 3 ⊢ (𝜑 → (𝑄‘(𝐸‘𝑄)) = (𝑄‘(𝑖 ∈ ω ↦ 1o))) |
6 | 5, 3 | eqtr3d 2199 | . 2 ⊢ (𝜑 → (𝑄‘(𝑖 ∈ ω ↦ 1o)) = 1o) |
7 | 1 | adantr 274 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ ω) → 𝑄 ∈ (2o ↑𝑚 ℕ∞)) |
8 | 3 | adantr 274 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ ω) → (𝑄‘(𝐸‘𝑄)) = 1o) |
9 | simpr 109 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ ω) → 𝑥 ∈ ω) | |
10 | 2, 7, 8, 9 | nninfsellemqall 13757 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ ω) → (𝑄‘(𝑖 ∈ ω ↦ if(𝑖 ∈ 𝑥, 1o, ∅))) = 1o) |
11 | 10 | ralrimiva 2537 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ ω (𝑄‘(𝑖 ∈ ω ↦ if(𝑖 ∈ 𝑥, 1o, ∅))) = 1o) |
12 | 1, 6, 11 | nninfall 13751 | 1 ⊢ (𝜑 → ∀𝑝 ∈ ℕ∞ (𝑄‘𝑝) = 1o) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1342 ∈ wcel 2135 ∀wral 2442 ∅c0 3405 ifcif 3516 ↦ cmpt 4038 suc csuc 4338 ωcom 4562 ‘cfv 5183 (class class class)co 5837 1oc1o 6369 2oc2o 6370 ↑𝑚 cmap 6606 ℕ∞xnninf 7076 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-coll 4092 ax-sep 4095 ax-nul 4103 ax-pow 4148 ax-pr 4182 ax-un 4406 ax-setind 4509 ax-iinf 4560 |
This theorem depends on definitions: df-bi 116 df-dc 825 df-3or 968 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-ral 2447 df-rex 2448 df-reu 2449 df-rab 2451 df-v 2724 df-sbc 2948 df-csb 3042 df-dif 3114 df-un 3116 df-in 3118 df-ss 3125 df-nul 3406 df-if 3517 df-pw 3556 df-sn 3577 df-pr 3578 df-op 3580 df-uni 3785 df-int 3820 df-iun 3863 df-br 3978 df-opab 4039 df-mpt 4040 df-tr 4076 df-id 4266 df-iord 4339 df-on 4341 df-suc 4344 df-iom 4563 df-xp 4605 df-rel 4606 df-cnv 4607 df-co 4608 df-dm 4609 df-rn 4610 df-res 4611 df-ima 4612 df-iota 5148 df-fun 5185 df-fn 5186 df-f 5187 df-f1 5188 df-fo 5189 df-f1o 5190 df-fv 5191 df-ov 5840 df-oprab 5841 df-mpo 5842 df-1o 6376 df-2o 6377 df-map 6608 df-nninf 7077 |
This theorem is referenced by: nninfomnilem 13760 |
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