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Theorem btwnlng13 35066
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 (𝜑𝐺 ∈ TarskiG)
btwnlng13.x (𝜑𝑋𝑃)
btwnlng13.y (𝜑𝑌𝑃)
btwnlng13.z (𝜑𝑍𝑃)
btwnlng13.d (𝜑𝑋𝑌)
btwnlng13.1 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
Assertion
Ref Expression
btwnlng13 (𝜑𝑍 ∈ (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 (𝜑𝐺 ∈ TarskiG)
54adantr 485 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝐺 ∈ TarskiG)
6 btwnlng13.x . . . 4 (𝜑𝑋𝑃)
76adantr 485 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋𝑃)
8 btwnlng13.y . . . 4 (𝜑𝑌𝑃)
98adantr 485 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑌𝑃)
10 btwnlng13.z . . . 4 (𝜑𝑍𝑃)
1110adantr 485 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍𝑃)
12 btwnlng13.d . . . 4 (𝜑𝑋𝑌)
1312adantr 485 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑋𝑌)
14 simpr 489 . . 3 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐼𝑌))
151, 2, 3, 5, 7, 9, 11, 13, 14btwnlng1 28901 . 2 ((𝜑𝑍 ∈ (𝑋𝐼𝑌)) → 𝑍 ∈ (𝑋𝐿𝑌))
164adantr 485 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝐺 ∈ TarskiG)
176adantr 485 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋𝑃)
188adantr 485 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌𝑃)
1910adantr 485 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍𝑃)
2012adantr 485 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑋𝑌)
21 simpr 489 . . 3 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑌 ∈ (𝑋𝐼𝑍))
221, 2, 3, 16, 17, 18, 19, 20, 21btwnlng3 28903 . 2 ((𝜑𝑌 ∈ (𝑋𝐼𝑍)) → 𝑍 ∈ (𝑋𝐿𝑌))
23 btwnlng13.1 . 2 (𝜑 → (𝑍 ∈ (𝑋𝐼𝑌) ∨ 𝑌 ∈ (𝑋𝐼𝑍)))
2415, 22, 23mpjaodan 973 1 (𝜑𝑍 ∈ (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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