Theorem oppne3 26108

Description: Points lying on opposite sides of a line cannot be equal. (Contributed by Thierry Arnoux, 3-Aug-2020.)

Hypotheses

Ref	Expression
hpg.p	⊢ 𝑃 = (Base‘𝐺)
hpg.d	⊢ − = (dist‘𝐺)
hpg.i	⊢ 𝐼 = (Itv‘𝐺)
hpg.o	⊢ 𝑂 = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃 ∖ 𝐷) ∧ 𝑏 ∈ (𝑃 ∖ 𝐷)) ∧ ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝑎𝐼𝑏))}
opphl.l	⊢ 𝐿 = (LineG‘𝐺)
opphl.d	⊢ (𝜑 → 𝐷 ∈ ran 𝐿)
opphl.g	⊢ (𝜑 → 𝐺 ∈ TarskiG)
oppcom.a	⊢ (𝜑 → 𝐴 ∈ 𝑃)
oppcom.b	⊢ (𝜑 → 𝐵 ∈ 𝑃)
oppcom.o	⊢ (𝜑 → 𝐴𝑂𝐵)

Assertion

Ref	Expression
oppne3	⊢ (𝜑 → 𝐴 ≠ 𝐵)

Distinct variable groups:   𝐷,𝑎,𝑏   𝐼,𝑎,𝑏   𝑃,𝑎,𝑏   𝑡,𝐴   𝑡,𝐵   𝑡,𝐷   𝑡,𝐺   𝑡,𝐿   𝑡,𝐼   𝑡,𝑂   𝑡,𝑃   𝜑,𝑡   𝑡, −   𝑡,𝑎,𝑏

Allowed substitution hints:   𝜑(𝑎,𝑏)   𝐴(𝑎,𝑏)   𝐵(𝑎,𝑏)   𝐺(𝑎,𝑏)   𝐿(𝑎,𝑏)   − (𝑎,𝑏)   𝑂(𝑎,𝑏)

Proof of Theorem oppne3

Step	Hyp	Ref	Expression
1		hpg.p	. . . . . 6 ⊢ 𝑃 = (Base‘𝐺)
2		eqid 2778	. . . . . 6 ⊢ (dist‘𝐺) = (dist‘𝐺)
3		hpg.i	. . . . . 6 ⊢ 𝐼 = (Itv‘𝐺)
4		opphl.g	. . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
5	4	ad3antrrr 720	. . . . . 6 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐺 ∈ TarskiG)
6		oppcom.a	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
7	6	ad3antrrr 720	. . . . . 6 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐴 ∈ 𝑃)
8		opphl.l	. . . . . . 7 ⊢ 𝐿 = (LineG‘𝐺)
9		opphl.d	. . . . . . . 8 ⊢ (𝜑 → 𝐷 ∈ ran 𝐿)
10	9	ad3antrrr 720	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐷 ∈ ran 𝐿)
11		simplr 759	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝑡 ∈ 𝐷)
12	1, 8, 3, 5, 10, 11	tglnpt 25917	. . . . . 6 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝑡 ∈ 𝑃)
13		simpr 479	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝑡 ∈ (𝐴𝐼𝐵))
14		simpllr 766	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐴 = 𝐵)
15	14	oveq2d 6940	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → (𝐴𝐼𝐴) = (𝐴𝐼𝐵))
16	13, 15	eleqtrrd 2862	. . . . . 6 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝑡 ∈ (𝐴𝐼𝐴))
17	1, 2, 3, 5, 7, 12, 16	axtgbtwnid 25834	. . . . 5 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐴 = 𝑡)
18	17, 11	eqeltrd 2859	. . . 4 ⊢ ((((𝜑 ∧ 𝐴 = 𝐵) ∧ 𝑡 ∈ 𝐷) ∧ 𝑡 ∈ (𝐴𝐼𝐵)) → 𝐴 ∈ 𝐷)
19		oppcom.o	. . . . . . 7 ⊢ (𝜑 → 𝐴𝑂𝐵)
20		hpg.d	. . . . . . . 8 ⊢ − = (dist‘𝐺)
21		hpg.o	. . . . . . . 8 ⊢ 𝑂 = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃 ∖ 𝐷) ∧ 𝑏 ∈ (𝑃 ∖ 𝐷)) ∧ ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝑎𝐼𝑏))}
22		oppcom.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ 𝑃)
23	1, 20, 3, 21, 6, 22	islnopp 26104	. . . . . . 7 ⊢ (𝜑 → (𝐴𝑂𝐵 ↔ ((¬ 𝐴 ∈ 𝐷 ∧ ¬ 𝐵 ∈ 𝐷) ∧ ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝐴𝐼𝐵))))
24	19, 23	mpbid 224	. . . . . 6 ⊢ (𝜑 → ((¬ 𝐴 ∈ 𝐷 ∧ ¬ 𝐵 ∈ 𝐷) ∧ ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝐴𝐼𝐵)))
25	24	simprd 491	. . . . 5 ⊢ (𝜑 → ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝐴𝐼𝐵))
26	25	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝐴 = 𝐵) → ∃𝑡 ∈ 𝐷 𝑡 ∈ (𝐴𝐼𝐵))
27	18, 26	r19.29a 3264	. . 3 ⊢ ((𝜑 ∧ 𝐴 = 𝐵) → 𝐴 ∈ 𝐷)
28	1, 20, 3, 21, 8, 9, 4, 6, 22, 19	oppne1 26106	. . . 4 ⊢ (𝜑 → ¬ 𝐴 ∈ 𝐷)
29	28	adantr 474	. . 3 ⊢ ((𝜑 ∧ 𝐴 = 𝐵) → ¬ 𝐴 ∈ 𝐷)
30	27, 29	pm2.65da 807	. 2 ⊢ (𝜑 → ¬ 𝐴 = 𝐵)
31	30	neqned 2976	1 ⊢ (𝜑 → 𝐴 ≠ 𝐵)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 386   = wceq 1601   ∈ wcel 2107   ≠ wne 2969  ∃wrex 3091   ∖ cdif 3789   class class class wbr 4888  {copab 4950  ran crn 5358  ‘cfv 6137  (class class class)co 6924  Basecbs 16266  distcds 16358  TarskiGcstrkg 25798  Itvcitv 25804  LineGclng 25805

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2055  ax-9 2116  ax-10 2135  ax-11 2150  ax-12 2163  ax-13 2334  ax-ext 2754  ax-sep 5019  ax-nul 5027  ax-pr 5140

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3or 1072  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2551  df-eu 2587  df-clab 2764  df-cleq 2770  df-clel 2774  df-nfc 2921  df-ne 2970  df-ral 3095  df-rex 3096  df-rab 3099  df-v 3400  df-sbc 3653  df-dif 3795  df-un 3797  df-in 3799  df-ss 3806  df-nul 4142  df-if 4308  df-pw 4381  df-sn 4399  df-pr 4401  df-op 4405  df-uni 4674  df-br 4889  df-opab 4951  df-cnv 5365  df-dm 5367  df-rn 5368  df-iota 6101  df-fv 6145  df-ov 6927  df-oprab 6928  df-mpt2 6929  df-trkgb 25817  df-trkg 25821

This theorem is referenced by:  colopp  26134  colhp  26135  trgcopyeulem  26170