btwnhl1 - Metamath Proof Explorer

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Theorem btwnhl1 28638

Description: Deduce half-line from betweenness. (Contributed by Thierry Arnoux, 4-Mar-2020.)

**Hypotheses**
Ref	Expression
ishlg.p	⊢ 𝑃 = (Base‘𝐺)
ishlg.i	⊢ 𝐼 = (Itv‘𝐺)
ishlg.k	⊢ 𝐾 = (hlG‘𝐺)
ishlg.a	⊢ (𝜑 → 𝐴 ∈ 𝑃)
ishlg.b	⊢ (𝜑 → 𝐵 ∈ 𝑃)
ishlg.c	⊢ (𝜑 → 𝐶 ∈ 𝑃)
hlln.1	⊢ (𝜑 → 𝐺 ∈ TarskiG)
hltr.d	⊢ (𝜑 → 𝐷 ∈ 𝑃)
btwnhl1.1	⊢ (𝜑 → 𝐶 ∈ (𝐴𝐼𝐵))
btwnhl1.2	⊢ (𝜑 → 𝐴 ≠ 𝐵)
btwnhl1.3	⊢ (𝜑 → 𝐶 ≠ 𝐴)

**Assertion**
Ref	Expression
btwnhl1	⊢ (𝜑 → 𝐶(𝐾‘𝐴)𝐵)

**Proof of Theorem btwnhl1**
Step	Hyp	Ref	Expression
1		btwnhl1.3	. 2 ⊢ (𝜑 → 𝐶 ≠ 𝐴)
2		btwnhl1.2	. . 3 ⊢ (𝜑 → 𝐴 ≠ 𝐵)
3	2	necomd 3002	. 2 ⊢ (𝜑 → 𝐵 ≠ 𝐴)
4		btwnhl1.1	. . 3 ⊢ (𝜑 → 𝐶 ∈ (𝐴𝐼𝐵))
5	4	orcd 872	. 2 ⊢ (𝜑 → (𝐶 ∈ (𝐴𝐼𝐵) ∨ 𝐵 ∈ (𝐴𝐼𝐶)))
6		ishlg.p	. . 3 ⊢ 𝑃 = (Base‘𝐺)
7		ishlg.i	. . 3 ⊢ 𝐼 = (Itv‘𝐺)
8		ishlg.k	. . 3 ⊢ 𝐾 = (hlG‘𝐺)
9		ishlg.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑃)
10		ishlg.b	. . 3 ⊢ (𝜑 → 𝐵 ∈ 𝑃)
11		ishlg.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
12		hlln.1	. . 3 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
13	6, 7, 8, 9, 10, 11, 12	ishlg 28628	. 2 ⊢ (𝜑 → (𝐶(𝐾‘𝐴)𝐵 ↔ (𝐶 ≠ 𝐴 ∧ 𝐵 ≠ 𝐴 ∧ (𝐶 ∈ (𝐴𝐼𝐵) ∨ 𝐵 ∈ (𝐴𝐼𝐶)))))
14	1, 3, 5, 13	mpbir3and 1342	1 ⊢ (𝜑 → 𝐶(𝐾‘𝐴)𝐵)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∨ wo 846 = wceq 1537 ∈ wcel 2108 ≠ wne 2946 class class class wbr 5166 ‘cfv 6573 (class class class)co 7448 Basecbs 17258 TarskiGcstrkg 28453 Itvcitv 28459 hlGchlg 28626

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-ral 3068 df-rex 3077 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-id 5593 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-ov 7451 df-hlg 28627

This theorem is referenced by: outpasch 28781 hlpasch 28782 lnopp2hpgb 28789 dfcgra2 28856

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