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Theorem hpgssplng 29059
Description: Any point 𝑋 on a half plane defined by a line 𝐴 and another point 𝑌 is on the plane defined by 𝐴 and 𝑌. (Contributed by Thierry Arnoux, 5-Jul-2026.)
Hypotheses
Ref Expression
hpgssplng.p 𝑃 = (Base‘𝐺)
hpgssplng.l 𝐿 = (LineG‘𝐺)
hpgssplng.e 𝐸 = (hlG‘𝐺)
hpgssplng.a (𝜑𝐴 ∈ ran 𝐿)
hpgssplng.x (𝜑𝑋𝑃)
hpgssplng.y (𝜑𝑌 ∈ (𝑃𝐴))
hpgssplng.g (𝜑𝐺 ∈ TarskiG)
hpgssplng.1 (𝜑𝑋((hpG‘𝐺)‘𝐴)𝑌)
Assertion
Ref Expression
hpgssplng (𝜑𝑋 ∈ (𝐴𝐸𝑌))

Proof of Theorem hpgssplng
Dummy variables 𝑎 𝑏 𝑡 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 hpgssplng.1 . . 3 (𝜑𝑋((hpG‘𝐺)‘𝐴)𝑌)
213mix2d 1356 . 2 (𝜑 → (𝑋𝐴𝑋((hpG‘𝐺)‘𝐴)𝑌𝑋{⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃𝐴) ∧ 𝑏 ∈ (𝑃𝐴)) ∧ ∃𝑡𝐴 𝑡 ∈ (𝑎(Itv‘𝐺)𝑏))}𝑌))
3 hpgssplng.p . . 3 𝑃 = (Base‘𝐺)
4 eqid 2763 . . 3 (Itv‘𝐺) = (Itv‘𝐺)
5 hpgssplng.l . . 3 𝐿 = (LineG‘𝐺)
6 hpgssplng.e . . 3 𝐸 = (hlG‘𝐺)
7 hpgssplng.g . . 3 (𝜑𝐺 ∈ TarskiG)
8 hpgssplng.a . . 3 (𝜑𝐴 ∈ ran 𝐿)
9 hpgssplng.y . . 3 (𝜑𝑌 ∈ (𝑃𝐴))
10 eqid 2763 . . 3 {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃𝐴) ∧ 𝑏 ∈ (𝑃𝐴)) ∧ ∃𝑡𝐴 𝑡 ∈ (𝑎(Itv‘𝐺)𝑏))} = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃𝐴) ∧ 𝑏 ∈ (𝑃𝐴)) ∧ ∃𝑡𝐴 𝑡 ∈ (𝑎(Itv‘𝐺)𝑏))}
11 hpgssplng.x . . 3 (𝜑𝑋𝑃)
123, 4, 5, 6, 7, 8, 9, 10, 11elplng 29043 . 2 (𝜑 → (𝑋 ∈ (𝐴𝐸𝑌) ↔ (𝑋𝐴𝑋((hpG‘𝐺)‘𝐴)𝑌𝑋{⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ (𝑃𝐴) ∧ 𝑏 ∈ (𝑃𝐴)) ∧ ∃𝑡𝐴 𝑡 ∈ (𝑎(Itv‘𝐺)𝑏))}𝑌)))
132, 12mpbird 260 1 (𝜑𝑋 ∈ (𝐴𝐸𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400  w3o 1102   = wceq 1570  wcel 2143  wrex 3089  cdif 3903   class class class wbr 5110  {copab 5174  ran crn 5664  cfv 6538  (class class class)co 7412  Basecbs 17270  TarskiGcstrkg 28677  Itvcitv 28683  LineGclng 28684  hpGchpg 29020  hlGcplng 29036
This theorem was proved from 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-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734
This theorem 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-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-ov 7415  df-oprab 7416  df-mpo 7417  df-1st 7987  df-2nd 7988  df-plng 29037
This theorem is referenced by:  dfprlng2  29178  prlngpln3  29180  prlngex  29182  prlngmolem2  29184
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