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Theorem btwnlng13 35366
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.)
Hypotheses
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)))
Assertion
Ref Expression
btwnlng13 (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌))

Proof of Theorem btwnlng13
StepHypRef 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)
54adantr 486 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝐺 ∈ TarskiG)
6 btwnlng13.x . . . 4 (𝜑 → 𝑋 ∈ 𝑃)
76adantr 486 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋 ∈ 𝑃)
8 btwnlng13.y . . . 4 (𝜑 → 𝑌 ∈ 𝑃)
98adantr 486 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑌 ∈ 𝑃)
10 btwnlng13.z . . . 4 (𝜑 → 𝑍 ∈ 𝑃)
1110adantr 486 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ 𝑃)
12 btwnlng13.d . . . 4 (𝜑 → 𝑋 ≠ 𝑌)
1312adantr 486 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋 ≠ 𝑌)
14 simpr 490 . . 3 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐼𝑌))
151, 2, 3, 5, 7, 9, 11, 13, 14btwnlng1 29114 . 2 ((𝜑 ∧ 𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐿𝑌))
164adantr 486 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝐺 ∈ TarskiG)
176adantr 486 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋 ∈ 𝑃)
188adantr 486 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ 𝑃)
1910adantr 486 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ 𝑃)
2012adantr 486 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋 ≠ 𝑌)
21 simpr 490 . . 3 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ (𝑋𝐼𝑍))
221, 2, 3, 16, 17, 18, 19, 20, 21btwnlng3 29116 . 2 ((𝜑 ∧ 𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ (𝑋𝐿𝑌))
23 btwnlng13.1 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
2415, 22, 23mpjaodan 973 1 (𝜑 → 𝑍 ∈ (𝑋𝐿𝑌))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∨ wo 861   = wceq 1570   ∈ wcel 2147   ≠ wne 2959  ‘cfv 6555  (class class class)co 7440  Basecbs 17413  TarskiGcstrkg 28916  Itvcitv 28922  LineGclng 28923
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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5252  ax-nul 5263  ax-pr 5395
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 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-sbc 3743  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-br 5107  df-opab 5171  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-iota 6509  df-fun 6557  df-fv 6563  df-ov 7443  df-oprab 7444  df-mpo 7445  df-trkg 28942
This theorem is used by:  morleylemrneab  35367
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