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| Mirrors > Home > MPE Home > Th. List > btwnlng2 | Structured version Visualization version GIF version | ||
| Description: Betweenness implies colinearity. (Contributed by Thierry Arnoux, 28-Mar-2019.) |
| Ref | Expression |
|---|---|
| btwnlng1.p | ⊢ 𝑃 = (Base‘𝐺) |
| btwnlng1.i | ⊢ 𝐼 = (Itv‘𝐺) |
| btwnlng1.l | ⊢ 𝐿 = (LineG‘𝐺) |
| btwnlng1.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
| btwnlng1.x | ⊢ (𝜑 → 𝑋 ∈ 𝑃) |
| btwnlng1.y | ⊢ (𝜑 → 𝑌 ∈ 𝑃) |
| btwnlng1.z | ⊢ (𝜑 → 𝑍 ∈ 𝑃) |
| btwnlng1.d | ⊢ (𝜑 → 𝑋 ≠ 𝑌) |
| btwnlng2.1 | ⊢ (𝜑 → 𝑋 ∈ (𝑍𝐼𝑌)) |
| Ref | Expression |
|---|---|
| btwnlng2 | ⊢ (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | btwnlng2.1 | . . 3 ⊢ (𝜑 → 𝑋 ∈ (𝑍𝐼𝑌)) | |
| 2 | 1 | 3mix2d 1356 | . 2 ⊢ (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍))) |
| 3 | btwnlng1.p | . . 3 ⊢ 𝑃 = (Base‘𝐺) | |
| 4 | btwnlng1.l | . . 3 ⊢ 𝐿 = (LineG‘𝐺) | |
| 5 | btwnlng1.i | . . 3 ⊢ 𝐼 = (Itv‘𝐺) | |
| 6 | btwnlng1.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
| 7 | btwnlng1.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝑃) | |
| 8 | btwnlng1.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝑃) | |
| 9 | btwnlng1.d | . . 3 ⊢ (𝜑 → 𝑋 ≠ 𝑌) | |
| 10 | btwnlng1.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑃) | |
| 11 | 3, 4, 5, 6, 7, 8, 9, 10 | tgellng 29016 | . 2 ⊢ (𝜑 → (𝑍 ∈ (𝑋𝐿𝑌) ↔ (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑋 ∈ (𝑍𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))) |
| 12 | 2, 11 | mpbird 260 | 1 ⊢ (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∨ w3o 1102 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 ‘cfv 6538 (class class class)co 7420 Basecbs 17387 TarskiGcstrkg 28889 Itvcitv 28895 LineGclng 28896 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6540 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-trkg 28915 |
| This theorem is used by: mirln 29148 colperpexlem3 29208 outpasch 29233 hpgerlem 29243 plngrotlem1 29265 plngrotlem2 29266 tgaaddcpbllem2 29350 morleylemrneab 35342 |
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