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| Mirrors > Home > MPE Home > Th. List > btwnlng3 | 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) |
| btwnlng3.1 | ⊢ (𝜑 → 𝑌 ∈ (𝑋𝐼𝑍)) |
| Ref | Expression |
|---|---|
| btwnlng3 | ⊢ (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | btwnlng3.1 | . . 3 ⊢ (𝜑 → 𝑌 ∈ (𝑋𝐼𝑍)) | |
| 2 | 1 | 3mix3d 1357 | . 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 29017 | . 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 1570 ∈ wcel 2145 ≠ wne 2956 ‘cfv 6539 (class class class)co 7421 Basecbs 17388 TarskiGcstrkg 28890 Itvcitv 28896 LineGclng 28897 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6495 df-fun 6541 df-fv 6547 df-ov 7424 df-oprab 7425 df-mpo 7426 df-trkg 28916 |
| This theorem is used by: midexlem 29165 footexALT 29194 footexlem1 29195 footexlem2 29196 mideulem2 29211 opphllem1 29224 outpasch 29234 colhp 29249 plngrotlem1 29266 plngrotlem2 29267 prlngmolem1 29431 btwnlng13 35300 morleylemrneab 35301 |
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