Mathbox for Jim Kingdon |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > Mathboxes > nnti | GIF version |
Description: Ordering on a natural number generates a tight apartness. (Contributed by Jim Kingdon, 7-Aug-2022.) |
Ref | Expression |
---|---|
nnti.a | ⊢ (𝜑 → 𝐴 ∈ ω) |
Ref | Expression |
---|---|
nnti | ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → (𝑢 = 𝑣 ↔ (¬ 𝑢 E 𝑣 ∧ ¬ 𝑣 E 𝑢))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simprl 521 | . . . 4 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → 𝑢 ∈ 𝐴) | |
2 | nnti.a | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ ω) | |
3 | 2 | adantr 274 | . . . 4 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → 𝐴 ∈ ω) |
4 | elnn 4583 | . . . 4 ⊢ ((𝑢 ∈ 𝐴 ∧ 𝐴 ∈ ω) → 𝑢 ∈ ω) | |
5 | 1, 3, 4 | syl2anc 409 | . . 3 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → 𝑢 ∈ ω) |
6 | simprr 522 | . . . 4 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → 𝑣 ∈ 𝐴) | |
7 | elnn 4583 | . . . 4 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝐴 ∈ ω) → 𝑣 ∈ ω) | |
8 | 6, 3, 7 | syl2anc 409 | . . 3 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → 𝑣 ∈ ω) |
9 | nntri3 6465 | . . 3 ⊢ ((𝑢 ∈ ω ∧ 𝑣 ∈ ω) → (𝑢 = 𝑣 ↔ (¬ 𝑢 ∈ 𝑣 ∧ ¬ 𝑣 ∈ 𝑢))) | |
10 | 5, 8, 9 | syl2anc 409 | . 2 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → (𝑢 = 𝑣 ↔ (¬ 𝑢 ∈ 𝑣 ∧ ¬ 𝑣 ∈ 𝑢))) |
11 | epel 4270 | . . . 4 ⊢ (𝑢 E 𝑣 ↔ 𝑢 ∈ 𝑣) | |
12 | 11 | notbii 658 | . . 3 ⊢ (¬ 𝑢 E 𝑣 ↔ ¬ 𝑢 ∈ 𝑣) |
13 | epel 4270 | . . . 4 ⊢ (𝑣 E 𝑢 ↔ 𝑣 ∈ 𝑢) | |
14 | 13 | notbii 658 | . . 3 ⊢ (¬ 𝑣 E 𝑢 ↔ ¬ 𝑣 ∈ 𝑢) |
15 | 12, 14 | anbi12i 456 | . 2 ⊢ ((¬ 𝑢 E 𝑣 ∧ ¬ 𝑣 E 𝑢) ↔ (¬ 𝑢 ∈ 𝑣 ∧ ¬ 𝑣 ∈ 𝑢)) |
16 | 10, 15 | bitr4di 197 | 1 ⊢ ((𝜑 ∧ (𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴)) → (𝑢 = 𝑣 ↔ (¬ 𝑢 E 𝑣 ∧ ¬ 𝑣 E 𝑢))) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ↔ wb 104 ∈ wcel 2136 class class class wbr 3982 E cep 4265 ωcom 4567 |
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 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 |
This theorem depends on definitions: df-bi 116 df-3or 969 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-br 3983 df-opab 4044 df-tr 4081 df-eprel 4267 df-iord 4344 df-on 4346 df-suc 4349 df-iom 4568 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |