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Mirrors > Home > ILE Home > Th. List > nnwetri | GIF version |
Description: A natural number is well-ordered by E. More specifically, this order both satisfies We and is trichotomous. (Contributed by Jim Kingdon, 25-Sep-2021.) |
Ref | Expression |
---|---|
nnwetri | ⊢ (𝐴 ∈ ω → ( E We 𝐴 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnord 4334 | . . 3 ⊢ (𝐴 ∈ ω → Ord 𝐴) | |
2 | ordwe 4300 | . . 3 ⊢ (Ord 𝐴 → E We 𝐴) | |
3 | 1, 2 | syl 14 | . 2 ⊢ (𝐴 ∈ ω → E We 𝐴) |
4 | simprl 483 | . . . . 5 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → 𝑥 ∈ 𝐴) | |
5 | simpl 102 | . . . . 5 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → 𝐴 ∈ ω) | |
6 | elnn 4328 | . . . . 5 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐴 ∈ ω) → 𝑥 ∈ ω) | |
7 | 4, 5, 6 | syl2anc 391 | . . . 4 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → 𝑥 ∈ ω) |
8 | simprr 484 | . . . . 5 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → 𝑦 ∈ 𝐴) | |
9 | elnn 4328 | . . . . 5 ⊢ ((𝑦 ∈ 𝐴 ∧ 𝐴 ∈ ω) → 𝑦 ∈ ω) | |
10 | 8, 5, 9 | syl2anc 391 | . . . 4 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → 𝑦 ∈ ω) |
11 | nntri3or 6072 | . . . . 5 ⊢ ((𝑥 ∈ ω ∧ 𝑦 ∈ ω) → (𝑥 ∈ 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 ∈ 𝑥)) | |
12 | epel 4029 | . . . . . 6 ⊢ (𝑥 E 𝑦 ↔ 𝑥 ∈ 𝑦) | |
13 | biid 160 | . . . . . 6 ⊢ (𝑥 = 𝑦 ↔ 𝑥 = 𝑦) | |
14 | epel 4029 | . . . . . 6 ⊢ (𝑦 E 𝑥 ↔ 𝑦 ∈ 𝑥) | |
15 | 12, 13, 14 | 3orbi123i 1094 | . . . . 5 ⊢ ((𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥) ↔ (𝑥 ∈ 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 ∈ 𝑥)) |
16 | 11, 15 | sylibr 137 | . . . 4 ⊢ ((𝑥 ∈ ω ∧ 𝑦 ∈ ω) → (𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥)) |
17 | 7, 10, 16 | syl2anc 391 | . . 3 ⊢ ((𝐴 ∈ ω ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥)) |
18 | 17 | ralrimivva 2401 | . 2 ⊢ (𝐴 ∈ ω → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥)) |
19 | 3, 18 | jca 290 | 1 ⊢ (𝐴 ∈ ω → ( E We 𝐴 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 E 𝑥))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 97 ∨ w3o 884 ∈ wcel 1393 ∀wral 2306 class class class wbr 3764 E cep 4024 We wwe 4067 Ord word 4099 ωcom 4313 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-nul 3883 ax-pow 3927 ax-pr 3944 ax-un 4170 ax-setind 4262 ax-iinf 4311 |
This theorem depends on definitions: df-bi 110 df-3or 886 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-v 2559 df-dif 2920 df-un 2922 df-in 2924 df-ss 2931 df-nul 3225 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-int 3616 df-br 3765 df-opab 3819 df-tr 3855 df-eprel 4026 df-frfor 4068 df-frind 4069 df-wetr 4071 df-iord 4103 df-on 4105 df-suc 4108 df-iom 4314 |
This theorem is referenced by: (None) |
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