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Theorem dalem2 37602
Description: Lemma for dath 37677. Show the lines 𝑃𝑄 and 𝑆𝑇 form a plane. (Contributed by NM, 11-Aug-2012.)
Hypotheses
Ref Expression
dalema.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)))))
dalemc.l = (le‘𝐾)
dalemc.j = (join‘𝐾)
dalemc.a 𝐴 = (Atoms‘𝐾)
dalem1.o 𝑂 = (LPlanes‘𝐾)
dalem1.y 𝑌 = ((𝑃 𝑄) 𝑅)
Assertion
Ref Expression
dalem2 (𝜑 → ((𝑃 𝑄) (𝑆 𝑇)) ∈ 𝑂)

Proof of Theorem dalem2
StepHypRef Expression
1 dalema.ph . . . 4 (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)))))
21dalemkehl 37564 . . 3 (𝜑𝐾 ∈ HL)
31dalempea 37567 . . 3 (𝜑𝑃𝐴)
41dalemqea 37568 . . 3 (𝜑𝑄𝐴)
51dalemsea 37570 . . 3 (𝜑𝑆𝐴)
61dalemtea 37571 . . 3 (𝜑𝑇𝐴)
7 dalemc.j . . . 4 = (join‘𝐾)
8 dalemc.a . . . 4 𝐴 = (Atoms‘𝐾)
97, 8hlatj4 37315 . . 3 ((𝐾 ∈ HL ∧ (𝑃𝐴𝑄𝐴) ∧ (𝑆𝐴𝑇𝐴)) → ((𝑃 𝑄) (𝑆 𝑇)) = ((𝑃 𝑆) (𝑄 𝑇)))
102, 3, 4, 5, 6, 9syl122anc 1377 . 2 (𝜑 → ((𝑃 𝑄) (𝑆 𝑇)) = ((𝑃 𝑆) (𝑄 𝑇)))
11 dalemc.l . . . . 5 = (le‘𝐾)
12 dalem1.o . . . . 5 𝑂 = (LPlanes‘𝐾)
13 dalem1.y . . . . 5 𝑌 = ((𝑃 𝑄) 𝑅)
141, 11, 7, 8, 12, 13dalempjsen 37594 . . . 4 (𝜑 → (𝑃 𝑆) ∈ (LLines‘𝐾))
151, 11, 7, 8, 12, 13dalemqnet 37593 . . . . 5 (𝜑𝑄𝑇)
16 eqid 2738 . . . . . 6 (LLines‘𝐾) = (LLines‘𝐾)
177, 8, 16llni2 37453 . . . . 5 (((𝐾 ∈ HL ∧ 𝑄𝐴𝑇𝐴) ∧ 𝑄𝑇) → (𝑄 𝑇) ∈ (LLines‘𝐾))
182, 4, 6, 15, 17syl31anc 1371 . . . 4 (𝜑 → (𝑄 𝑇) ∈ (LLines‘𝐾))
191, 11, 7, 8, 12, 13dalem1 37600 . . . 4 (𝜑 → (𝑃 𝑆) ≠ (𝑄 𝑇))
201, 11, 7, 8, 12, 13dalemcea 37601 . . . . 5 (𝜑𝐶𝐴)
211dalemclpjs 37575 . . . . 5 (𝜑𝐶 (𝑃 𝑆))
221dalemclqjt 37576 . . . . 5 (𝜑𝐶 (𝑄 𝑇))
23 eqid 2738 . . . . . 6 (meet‘𝐾) = (meet‘𝐾)
24 eqid 2738 . . . . . 6 (0.‘𝐾) = (0.‘𝐾)
2511, 23, 24, 8, 162llnm4 37511 . . . . 5 ((𝐾 ∈ HL ∧ (𝐶𝐴 ∧ (𝑃 𝑆) ∈ (LLines‘𝐾) ∧ (𝑄 𝑇) ∈ (LLines‘𝐾)) ∧ (𝐶 (𝑃 𝑆) ∧ 𝐶 (𝑄 𝑇))) → ((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ≠ (0.‘𝐾))
262, 20, 14, 18, 21, 22, 25syl132anc 1386 . . . 4 (𝜑 → ((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ≠ (0.‘𝐾))
2723, 24, 8, 162llnmat 37465 . . . 4 (((𝐾 ∈ HL ∧ (𝑃 𝑆) ∈ (LLines‘𝐾) ∧ (𝑄 𝑇) ∈ (LLines‘𝐾)) ∧ ((𝑃 𝑆) ≠ (𝑄 𝑇) ∧ ((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ≠ (0.‘𝐾))) → ((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ∈ 𝐴)
282, 14, 18, 19, 26, 27syl32anc 1376 . . 3 (𝜑 → ((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ∈ 𝐴)
297, 23, 8, 16, 122llnmj 37501 . . . 4 ((𝐾 ∈ HL ∧ (𝑃 𝑆) ∈ (LLines‘𝐾) ∧ (𝑄 𝑇) ∈ (LLines‘𝐾)) → (((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ∈ 𝐴 ↔ ((𝑃 𝑆) (𝑄 𝑇)) ∈ 𝑂))
302, 14, 18, 29syl3anc 1369 . . 3 (𝜑 → (((𝑃 𝑆)(meet‘𝐾)(𝑄 𝑇)) ∈ 𝐴 ↔ ((𝑃 𝑆) (𝑄 𝑇)) ∈ 𝑂))
3128, 30mpbid 231 . 2 (𝜑 → ((𝑃 𝑆) (𝑄 𝑇)) ∈ 𝑂)
3210, 31eqeltrd 2839 1 (𝜑 → ((𝑃 𝑄) (𝑆 𝑇)) ∈ 𝑂)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 395  w3a 1085   = wceq 1539  wcel 2108  wne 2942   class class class wbr 5070  cfv 6418  (class class class)co 7255  Basecbs 16840  lecple 16895  joincjn 17944  meetcmee 17945  0.cp0 18056  Atomscatm 37204  HLchlt 37291  LLinesclln 37432  LPlanesclpl 37433
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-proset 17928  df-poset 17946  df-plt 17963  df-lub 17979  df-glb 17980  df-join 17981  df-meet 17982  df-p0 18058  df-lat 18065  df-clat 18132  df-oposet 37117  df-ol 37119  df-oml 37120  df-covers 37207  df-ats 37208  df-atl 37239  df-cvlat 37263  df-hlat 37292  df-llines 37439  df-lplanes 37440
This theorem is referenced by:  dalemdea  37603
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