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| Mirrors > Home > MPE Home > Th. List > Mathboxes > btwnlng13 | Structured version Visualization version GIF version | ||
| Description: If 𝑍 is between 𝑋 and 𝑌, or 𝑌 is between 𝑋 and 𝑍, then 𝑍 lies on the line 𝑋𝑌. (Contributed by SS, 4-Jun-2026.) |
| Ref | Expression |
|---|---|
| btwnlng13.p | ⊢ 𝑃 = (Base‘𝐺) |
| btwnlng13.i | ⊢ 𝐼 = (Itv‘𝐺) |
| btwnlng13.l | ⊢ 𝐿 = (LineG‘𝐺) |
| btwnlng13.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
| btwnlng13.x | ⊢ (𝜑 → 𝑋 ∈ 𝑃) |
| btwnlng13.y | ⊢ (𝜑 → 𝑌 ∈ 𝑃) |
| btwnlng13.z | ⊢ (𝜑 → 𝑍 ∈ 𝑃) |
| btwnlng13.d | ⊢ (𝜑 → 𝑋 ≠ 𝑌) |
| btwnlng13.1 | ⊢ (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍))) |
| Ref | Expression |
|---|---|
| btwnlng13 | ⊢ (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | btwnlng13.p | . . 3 ⊢ 𝑃 = (Base‘𝐺) | |
| 2 | btwnlng13.i | . . 3 ⊢ 𝐼 = (Itv‘𝐺) | |
| 3 | btwnlng13.l | . . 3 ⊢ 𝐿 = (LineG‘𝐺) | |
| 4 | btwnlng13.g | . . . 4 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
| 5 | 4 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝐺 ∈ TarskiG) |
| 6 | btwnlng13.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑃) | |
| 7 | 6 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋 ∈ 𝑃) |
| 8 | btwnlng13.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑃) | |
| 9 | 8 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑌 ∈ 𝑃) |
| 10 | btwnlng13.z | . . . 4 ⊢ (𝜑 → 𝑍 ∈ 𝑃) | |
| 11 | 10 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ 𝑃) |
| 12 | btwnlng13.d | . . . 4 ⊢ (𝜑 → 𝑋 ≠ 𝑌) | |
| 13 | 12 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋 ≠ 𝑌) |
| 14 | simpr 489 | . . 3 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐼𝑌)) | |
| 15 | 1, 2, 3, 5, 7, 9, 11, 13, 14 | btwnlng1 28901 | . 2 ⊢ ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐿𝑌)) |
| 16 | 4 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝐺 ∈ TarskiG) |
| 17 | 6 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋 ∈ 𝑃) |
| 18 | 8 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ 𝑃) |
| 19 | 10 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ 𝑃) |
| 20 | 12 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋 ≠ 𝑌) |
| 21 | simpr 489 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ (𝑋𝐼𝑍)) | |
| 22 | 1, 2, 3, 16, 17, 18, 19, 20, 21 | btwnlng3 28903 | . 2 ⊢ ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ (𝑋𝐿𝑌)) |
| 23 | btwnlng13.1 | . 2 ⊢ (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍))) | |
| 24 | 15, 22, 23 | mpjaodan 973 | 1 ⊢ (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 400 ∨ wo 860 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 ‘cfv 6536 (class class class)co 7410 Basecbs 17273 TarskiGcstrkg 28705 Itvcitv 28711 LineGclng 28712 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3745 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-iota 6492 df-fun 6538 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-trkg 28731 |
| This theorem is used by: morleylemrneab 35067 |
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