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Theorem dalem19 40885
Description: Lemma for dath 40939. Show that a second dummy atom 𝑑 exists outside of the 𝑌 and 𝑍 planes (when those planes are equal). (Contributed by NM, 15-Aug-2012.)
Hypotheses
Ref Expression
dalema.ph (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴 ∧ 𝑈 ∈ 𝐴)) ∧ (𝑌 ∈ 𝑂 ∧ 𝑍 ∈ 𝑂) ∧ ((¬ 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)
dalem19.o 𝑂 = (LPlanes‘𝐾)
dalem19.y 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
dalem19.z 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
Assertion
Ref Expression
dalem19 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → ∃𝑑 ∈ 𝐴 (𝑑 ≠ 𝑐 ∧ ¬ 𝑑 ≤ 𝑌 ∧ 𝐶 ≤ (𝑐 ∨ 𝑑)))
Distinct variable groups:   𝑐,𝑑   𝐴,𝑑   𝐶,𝑑   𝐾,𝑑   ≤ ,𝑑   𝑌,𝑑
Allowed substitution hints:   𝜑(𝑐, 𝑑)   𝐴(𝑐)   𝐶(𝑐)   𝑃(𝑐, 𝑑)   𝑄(𝑐, 𝑑)   𝑅(𝑐, 𝑑)   𝑆(𝑐, 𝑑)   𝑇(𝑐, 𝑑)   𝑈(𝑐, 𝑑)   ∨ (𝑐, 𝑑)   𝐾(𝑐)   ≤ (𝑐)   𝑂(𝑐, 𝑑)   𝑌(𝑐)   𝑍(𝑐, 𝑑)

Proof of Theorem dalem19
StepHypRef Expression
1 dalema.ph . . . 4 (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴 ∧ 𝑈 ∈ 𝐴)) ∧ (𝑌 ∈ 𝑂 ∧ 𝑍 ∈ 𝑂) ∧ ((¬ 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 40826 . . 3 (𝜑 → 𝐾 ∈ HL)
32ad3antrrr 743 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → 𝐾 ∈ HL)
4 dalemc.l . . . 4 ≤ = (le‘𝐾)
5 dalemc.j . . . 4 ∨ = (join‘𝐾)
6 dalemc.a . . . 4 𝐴 = (Atoms‘𝐾)
7 dalem19.o . . . 4 𝑂 = (LPlanes‘𝐾)
8 dalem19.y . . . 4 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
91, 4, 5, 6, 7, 8dalemcea 40863 . . 3 (𝜑 → 𝐶 ∈ 𝐴)
109ad3antrrr 743 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → 𝐶 ∈ 𝐴)
11 simplr 781 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → 𝑐 ∈ 𝐴)
121, 7dalemyeb 40852 . . 3 (𝜑 → 𝑌 ∈ (Base‘𝐾))
1312ad3antrrr 743 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → 𝑌 ∈ (Base‘𝐾))
14 dalem19.z . . . 4 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
151, 4, 5, 6, 7, 8, 14dalem17 40883 . . 3 ((𝜑 ∧ 𝑌 = 𝑍) → 𝐶 ≤ 𝑌)
1615ad2antrr 739 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → 𝐶 ≤ 𝑌)
17 simpr 490 . 2 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → ¬ 𝑐 ≤ 𝑌)
18 eqid 2763 . . 3 (Base‘𝐾) = (Base‘𝐾)
1918, 4, 5, 6atbtwnex 40651 . 2 (((𝐾 ∈ HL ∧ 𝐶 ∈ 𝐴 ∧ 𝑐 ∈ 𝐴) ∧ (𝑌 ∈ (Base‘𝐾) ∧ 𝐶 ≤ 𝑌 ∧ ¬ 𝑐 ≤ 𝑌)) → ∃𝑑 ∈ 𝐴 (𝑑 ≠ 𝑐 ∧ ¬ 𝑑 ≤ 𝑌 ∧ 𝐶 ≤ (𝑐 ∨ 𝑑)))
203, 10, 11, 13, 16, 17, 19syl33anc 1412 1 ((((𝜑 ∧ 𝑌 = 𝑍) ∧ 𝑐 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌) → ∃𝑑 ∈ 𝐴 (𝑑 ≠ 𝑐 ∧ ¬ 𝑑 ≤ 𝑌 ∧ 𝐶 ≤ (𝑐 ∨ 𝑑)))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 401   ∧ w3a 1103   = wceq 1569   ∈ wcel 2146   ≠ wne 2959  ∃wrex 3090   class class class wbr 5106  ‘cfv 6547  (class class class)co 7430  Basecbs 17402  lecple 17450  joincjn 18500  Atomscatm 40466  HLchlt 40553  LPlanesclpl 40695
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1944  ax-6 2001  ax-7 2042  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2196  ax-12 2215  ax-ext 2735  ax-rep 5235  ax-sep 5252  ax-nul 5263  ax-pow 5331  ax-pr 5395  ax-un 7761
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2101  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-iun 4956  df-br 5107  df-opab 5171  df-mpt 5190  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6501  df-fun 6549  df-fn 6550  df-f 6551  df-f1 6552  df-fo 6553  df-f1o 6554  df-fv 6555  df-riota 7387  df-ov 7433  df-oprab 7434  df-proset 18483  df-poset 18502  df-plt 18517  df-lub 18533  df-glb 18534  df-join 18535  df-meet 18536  df-p0 18612  df-lat 18621  df-clat 18688  df-oposet 40379  df-ol 40381  df-oml 40382  df-covers 40469  df-ats 40470  df-atl 40501  df-cvlat 40525  df-hlat 40554  df-llines 40701  df-lplanes 40702
This theorem is used by:  dalem20  40896
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