| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > pitri3or | GIF version | ||
| Description: Trichotomy for positive integers. (Contributed by Jim Kingdon, 21-Sep-2019.) |
| Ref | Expression |
|---|---|
| pitri3or | ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 <N 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 <N 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pinn 7528 | . . 3 ⊢ (𝐴 ∈ N → 𝐴 ∈ ω) | |
| 2 | pinn 7528 | . . 3 ⊢ (𝐵 ∈ N → 𝐵 ∈ ω) | |
| 3 | nntri3or 6660 | . . 3 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 ∈ 𝐴)) | |
| 4 | 1, 2, 3 | syl2an 289 | . 2 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 ∈ 𝐴)) |
| 5 | ltpiord 7538 | . . 3 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 <N 𝐵 ↔ 𝐴 ∈ 𝐵)) | |
| 6 | biidd 172 | . . 3 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 = 𝐵 ↔ 𝐴 = 𝐵)) | |
| 7 | ltpiord 7538 | . . . 4 ⊢ ((𝐵 ∈ N ∧ 𝐴 ∈ N) → (𝐵 <N 𝐴 ↔ 𝐵 ∈ 𝐴)) | |
| 8 | 7 | ancoms 268 | . . 3 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐵 <N 𝐴 ↔ 𝐵 ∈ 𝐴)) |
| 9 | 5, 6, 8 | 3orbi123d 1347 | . 2 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → ((𝐴 <N 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 <N 𝐴) ↔ (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 ∈ 𝐴))) |
| 10 | 4, 9 | mpbird 167 | 1 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 <N 𝐵 ∨ 𝐴 = 𝐵 ∨ 𝐵 <N 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∨ w3o 1003 = wceq 1397 ∈ wcel 2202 class class class wbr 4088 ωcom 4688 Ncnpi 7491 <N clti 7494 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-iinf 4686 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-tr 4188 df-eprel 4386 df-iord 4463 df-on 4465 df-suc 4468 df-iom 4689 df-xp 4731 df-ni 7523 df-lti 7526 |
| This theorem is referenced by: nqtri3or 7615 caucvgprlemnkj 7885 caucvgprlemnbj 7886 caucvgprprlemnkj 7911 caucvgprprlemnbj 7912 caucvgsr 8021 |
| Copyright terms: Public domain | W3C validator |