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Theorem dalem27 36837
 Description: Lemma for dath 36874. Show that the line 𝐺𝑃 intersects the dummy center of perspectivity 𝑐. (Contributed by NM, 8-Aug-2012.)
Hypotheses
Ref Expression
dalem.ph (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃𝐴𝑄𝐴𝑅𝐴) ∧ (𝑆𝐴𝑇𝐴𝑈𝐴)) ∧ (𝑌𝑂𝑍𝑂) ∧ ((¬ 𝐶 (𝑃 𝑄) ∧ ¬ 𝐶 (𝑄 𝑅) ∧ ¬ 𝐶 (𝑅 𝑃)) ∧ (¬ 𝐶 (𝑆 𝑇) ∧ ¬ 𝐶 (𝑇 𝑈) ∧ ¬ 𝐶 (𝑈 𝑆)) ∧ (𝐶 (𝑃 𝑆) ∧ 𝐶 (𝑄 𝑇) ∧ 𝐶 (𝑅 𝑈)))))
dalem.l = (le‘𝐾)
dalem.j = (join‘𝐾)
dalem.a 𝐴 = (Atoms‘𝐾)
dalem.ps (𝜓 ↔ ((𝑐𝐴𝑑𝐴) ∧ ¬ 𝑐 𝑌 ∧ (𝑑𝑐 ∧ ¬ 𝑑 𝑌𝐶 (𝑐 𝑑))))
dalem23.m = (meet‘𝐾)
dalem23.o 𝑂 = (LPlanes‘𝐾)
dalem23.y 𝑌 = ((𝑃 𝑄) 𝑅)
dalem23.z 𝑍 = ((𝑆 𝑇) 𝑈)
dalem23.g 𝐺 = ((𝑐 𝑃) (𝑑 𝑆))
Assertion
Ref Expression
dalem27 ((𝜑𝑌 = 𝑍𝜓) → 𝑐 (𝐺 𝑃))

Proof of Theorem dalem27
StepHypRef Expression
1 dalem23.g . . 3 𝐺 = ((𝑐 𝑃) (𝑑 𝑆))
2 dalem.ph . . . . . 6 (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃𝐴𝑄𝐴𝑅𝐴) ∧ (𝑆𝐴𝑇𝐴𝑈𝐴)) ∧ (𝑌𝑂𝑍𝑂) ∧ ((¬ 𝐶 (𝑃 𝑄) ∧ ¬ 𝐶 (𝑄 𝑅) ∧ ¬ 𝐶 (𝑅 𝑃)) ∧ (¬ 𝐶 (𝑆 𝑇) ∧ ¬ 𝐶 (𝑇 𝑈) ∧ ¬ 𝐶 (𝑈 𝑆)) ∧ (𝐶 (𝑃 𝑆) ∧ 𝐶 (𝑄 𝑇) ∧ 𝐶 (𝑅 𝑈)))))
32dalemkelat 36762 . . . . 5 (𝜑𝐾 ∈ Lat)
433ad2ant1 1129 . . . 4 ((𝜑𝑌 = 𝑍𝜓) → 𝐾 ∈ Lat)
52dalemkehl 36761 . . . . . 6 (𝜑𝐾 ∈ HL)
653ad2ant1 1129 . . . . 5 ((𝜑𝑌 = 𝑍𝜓) → 𝐾 ∈ HL)
7 dalem.ps . . . . . . 7 (𝜓 ↔ ((𝑐𝐴𝑑𝐴) ∧ ¬ 𝑐 𝑌 ∧ (𝑑𝑐 ∧ ¬ 𝑑 𝑌𝐶 (𝑐 𝑑))))
87dalemccea 36821 . . . . . 6 (𝜓𝑐𝐴)
983ad2ant3 1131 . . . . 5 ((𝜑𝑌 = 𝑍𝜓) → 𝑐𝐴)
102dalempea 36764 . . . . . 6 (𝜑𝑃𝐴)
11103ad2ant1 1129 . . . . 5 ((𝜑𝑌 = 𝑍𝜓) → 𝑃𝐴)
12 eqid 2823 . . . . . 6 (Base‘𝐾) = (Base‘𝐾)
13 dalem.j . . . . . 6 = (join‘𝐾)
14 dalem.a . . . . . 6 𝐴 = (Atoms‘𝐾)
1512, 13, 14hlatjcl 36505 . . . . 5 ((𝐾 ∈ HL ∧ 𝑐𝐴𝑃𝐴) → (𝑐 𝑃) ∈ (Base‘𝐾))
166, 9, 11, 15syl3anc 1367 . . . 4 ((𝜑𝑌 = 𝑍𝜓) → (𝑐 𝑃) ∈ (Base‘𝐾))
177dalemddea 36822 . . . . . 6 (𝜓𝑑𝐴)
18173ad2ant3 1131 . . . . 5 ((𝜑𝑌 = 𝑍𝜓) → 𝑑𝐴)
192dalemsea 36767 . . . . . 6 (𝜑𝑆𝐴)
20193ad2ant1 1129 . . . . 5 ((𝜑𝑌 = 𝑍𝜓) → 𝑆𝐴)
2112, 13, 14hlatjcl 36505 . . . . 5 ((𝐾 ∈ HL ∧ 𝑑𝐴𝑆𝐴) → (𝑑 𝑆) ∈ (Base‘𝐾))
226, 18, 20, 21syl3anc 1367 . . . 4 ((𝜑𝑌 = 𝑍𝜓) → (𝑑 𝑆) ∈ (Base‘𝐾))
23 dalem.l . . . . 5 = (le‘𝐾)
24 dalem23.m . . . . 5 = (meet‘𝐾)
2512, 23, 24latmle1 17688 . . . 4 ((𝐾 ∈ Lat ∧ (𝑐 𝑃) ∈ (Base‘𝐾) ∧ (𝑑 𝑆) ∈ (Base‘𝐾)) → ((𝑐 𝑃) (𝑑 𝑆)) (𝑐 𝑃))
264, 16, 22, 25syl3anc 1367 . . 3 ((𝜑𝑌 = 𝑍𝜓) → ((𝑐 𝑃) (𝑑 𝑆)) (𝑐 𝑃))
271, 26eqbrtrid 5103 . 2 ((𝜑𝑌 = 𝑍𝜓) → 𝐺 (𝑐 𝑃))
28 dalem23.o . . . 4 𝑂 = (LPlanes‘𝐾)
29 dalem23.y . . . 4 𝑌 = ((𝑃 𝑄) 𝑅)
30 dalem23.z . . . 4 𝑍 = ((𝑆 𝑇) 𝑈)
312, 23, 13, 14, 7, 24, 28, 29, 30, 1dalem23 36834 . . 3 ((𝜑𝑌 = 𝑍𝜓) → 𝐺𝐴)
322, 23, 13, 14, 28, 29dalemply 36792 . . . . 5 (𝜑𝑃 𝑌)
33323ad2ant1 1129 . . . 4 ((𝜑𝑌 = 𝑍𝜓) → 𝑃 𝑌)
342, 23, 13, 14, 7, 24, 28, 29, 30, 1dalem24 36835 . . . 4 ((𝜑𝑌 = 𝑍𝜓) → ¬ 𝐺 𝑌)
35 nbrne2 5088 . . . . 5 ((𝑃 𝑌 ∧ ¬ 𝐺 𝑌) → 𝑃𝐺)
3635necomd 3073 . . . 4 ((𝑃 𝑌 ∧ ¬ 𝐺 𝑌) → 𝐺𝑃)
3733, 34, 36syl2anc 586 . . 3 ((𝜑𝑌 = 𝑍𝜓) → 𝐺𝑃)
3823, 13, 14hlatexch2 36534 . . 3 ((𝐾 ∈ HL ∧ (𝐺𝐴𝑐𝐴𝑃𝐴) ∧ 𝐺𝑃) → (𝐺 (𝑐 𝑃) → 𝑐 (𝐺 𝑃)))
396, 31, 9, 11, 37, 38syl131anc 1379 . 2 ((𝜑𝑌 = 𝑍𝜓) → (𝐺 (𝑐 𝑃) → 𝑐 (𝐺 𝑃)))
4027, 39mpd 15 1 ((𝜑𝑌 = 𝑍𝜓) → 𝑐 (𝐺 𝑃))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083   = wceq 1537   ∈ wcel 2114   ≠ wne 3018   class class class wbr 5068  ‘cfv 6357  (class class class)co 7158  Basecbs 16485  lecple 16574  joincjn 17556  meetcmee 17557  Latclat 17657  Atomscatm 36401  HLchlt 36488  LPlanesclpl 36630 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463 This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-proset 17540  df-poset 17558  df-plt 17570  df-lub 17586  df-glb 17587  df-join 17588  df-meet 17589  df-p0 17651  df-lat 17658  df-clat 17720  df-oposet 36314  df-ol 36316  df-oml 36317  df-covers 36404  df-ats 36405  df-atl 36436  df-cvlat 36460  df-hlat 36489  df-llines 36636  df-lplanes 36637 This theorem is referenced by:  dalem28  36838  dalem32  36842  dalem51  36861  dalem52  36862
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