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Theorem lplni2 36667
Description: The join of 3 different atoms is a lattice plane. (Contributed by NM, 4-Jul-2012.)
Hypotheses
Ref Expression
lplni2.l = (le‘𝐾)
lplni2.j = (join‘𝐾)
lplni2.a 𝐴 = (Atoms‘𝐾)
lplni2.p 𝑃 = (LPlanes‘𝐾)
Assertion
Ref Expression
lplni2 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ((𝑄 𝑅) 𝑆) ∈ 𝑃)

Proof of Theorem lplni2
Dummy variables 𝑟 𝑞 𝑠 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simp2 1133 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → (𝑄𝐴𝑅𝐴𝑆𝐴))
2 simp3l 1197 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝑄𝑅)
3 simp3r 1198 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ¬ 𝑆 (𝑄 𝑅))
4 eqidd 2822 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑆))
5 neeq1 3078 . . . . 5 (𝑞 = 𝑄 → (𝑞𝑟𝑄𝑟))
6 oveq1 7157 . . . . . . 7 (𝑞 = 𝑄 → (𝑞 𝑟) = (𝑄 𝑟))
76breq2d 5071 . . . . . 6 (𝑞 = 𝑄 → (𝑠 (𝑞 𝑟) ↔ 𝑠 (𝑄 𝑟)))
87notbid 320 . . . . 5 (𝑞 = 𝑄 → (¬ 𝑠 (𝑞 𝑟) ↔ ¬ 𝑠 (𝑄 𝑟)))
96oveq1d 7165 . . . . . 6 (𝑞 = 𝑄 → ((𝑞 𝑟) 𝑠) = ((𝑄 𝑟) 𝑠))
109eqeq2d 2832 . . . . 5 (𝑞 = 𝑄 → (((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠) ↔ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑟) 𝑠)))
115, 8, 103anbi123d 1432 . . . 4 (𝑞 = 𝑄 → ((𝑞𝑟 ∧ ¬ 𝑠 (𝑞 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠)) ↔ (𝑄𝑟 ∧ ¬ 𝑠 (𝑄 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑟) 𝑠))))
12 neeq2 3079 . . . . 5 (𝑟 = 𝑅 → (𝑄𝑟𝑄𝑅))
13 oveq2 7158 . . . . . . 7 (𝑟 = 𝑅 → (𝑄 𝑟) = (𝑄 𝑅))
1413breq2d 5071 . . . . . 6 (𝑟 = 𝑅 → (𝑠 (𝑄 𝑟) ↔ 𝑠 (𝑄 𝑅)))
1514notbid 320 . . . . 5 (𝑟 = 𝑅 → (¬ 𝑠 (𝑄 𝑟) ↔ ¬ 𝑠 (𝑄 𝑅)))
1613oveq1d 7165 . . . . . 6 (𝑟 = 𝑅 → ((𝑄 𝑟) 𝑠) = ((𝑄 𝑅) 𝑠))
1716eqeq2d 2832 . . . . 5 (𝑟 = 𝑅 → (((𝑄 𝑅) 𝑆) = ((𝑄 𝑟) 𝑠) ↔ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑠)))
1812, 15, 173anbi123d 1432 . . . 4 (𝑟 = 𝑅 → ((𝑄𝑟 ∧ ¬ 𝑠 (𝑄 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑟) 𝑠)) ↔ (𝑄𝑅 ∧ ¬ 𝑠 (𝑄 𝑅) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑠))))
19 breq1 5062 . . . . . 6 (𝑠 = 𝑆 → (𝑠 (𝑄 𝑅) ↔ 𝑆 (𝑄 𝑅)))
2019notbid 320 . . . . 5 (𝑠 = 𝑆 → (¬ 𝑠 (𝑄 𝑅) ↔ ¬ 𝑆 (𝑄 𝑅)))
21 oveq2 7158 . . . . . 6 (𝑠 = 𝑆 → ((𝑄 𝑅) 𝑠) = ((𝑄 𝑅) 𝑆))
2221eqeq2d 2832 . . . . 5 (𝑠 = 𝑆 → (((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑠) ↔ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑆)))
2320, 223anbi23d 1435 . . . 4 (𝑠 = 𝑆 → ((𝑄𝑅 ∧ ¬ 𝑠 (𝑄 𝑅) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑠)) ↔ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑆))))
2411, 18, 23rspc3ev 3637 . . 3 (((𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅) ∧ ((𝑄 𝑅) 𝑆) = ((𝑄 𝑅) 𝑆))) → ∃𝑞𝐴𝑟𝐴𝑠𝐴 (𝑞𝑟 ∧ ¬ 𝑠 (𝑞 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠)))
251, 2, 3, 4, 24syl13anc 1368 . 2 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ∃𝑞𝐴𝑟𝐴𝑠𝐴 (𝑞𝑟 ∧ ¬ 𝑠 (𝑞 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠)))
26 simp1 1132 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝐾 ∈ HL)
27 hllat 36493 . . . . 5 (𝐾 ∈ HL → 𝐾 ∈ Lat)
28273ad2ant1 1129 . . . 4 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝐾 ∈ Lat)
29 simp21 1202 . . . . 5 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝑄𝐴)
30 simp22 1203 . . . . 5 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝑅𝐴)
31 eqid 2821 . . . . . 6 (Base‘𝐾) = (Base‘𝐾)
32 lplni2.j . . . . . 6 = (join‘𝐾)
33 lplni2.a . . . . . 6 𝐴 = (Atoms‘𝐾)
3431, 32, 33hlatjcl 36497 . . . . 5 ((𝐾 ∈ HL ∧ 𝑄𝐴𝑅𝐴) → (𝑄 𝑅) ∈ (Base‘𝐾))
3526, 29, 30, 34syl3anc 1367 . . . 4 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → (𝑄 𝑅) ∈ (Base‘𝐾))
36 simp23 1204 . . . . 5 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝑆𝐴)
3731, 33atbase 36419 . . . . 5 (𝑆𝐴𝑆 ∈ (Base‘𝐾))
3836, 37syl 17 . . . 4 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → 𝑆 ∈ (Base‘𝐾))
3931, 32latjcl 17655 . . . 4 ((𝐾 ∈ Lat ∧ (𝑄 𝑅) ∈ (Base‘𝐾) ∧ 𝑆 ∈ (Base‘𝐾)) → ((𝑄 𝑅) 𝑆) ∈ (Base‘𝐾))
4028, 35, 38, 39syl3anc 1367 . . 3 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ((𝑄 𝑅) 𝑆) ∈ (Base‘𝐾))
41 lplni2.l . . . 4 = (le‘𝐾)
42 lplni2.p . . . 4 𝑃 = (LPlanes‘𝐾)
4331, 41, 32, 33, 42islpln5 36665 . . 3 ((𝐾 ∈ HL ∧ ((𝑄 𝑅) 𝑆) ∈ (Base‘𝐾)) → (((𝑄 𝑅) 𝑆) ∈ 𝑃 ↔ ∃𝑞𝐴𝑟𝐴𝑠𝐴 (𝑞𝑟 ∧ ¬ 𝑠 (𝑞 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠))))
4426, 40, 43syl2anc 586 . 2 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → (((𝑄 𝑅) 𝑆) ∈ 𝑃 ↔ ∃𝑞𝐴𝑟𝐴𝑠𝐴 (𝑞𝑟 ∧ ¬ 𝑠 (𝑞 𝑟) ∧ ((𝑄 𝑅) 𝑆) = ((𝑞 𝑟) 𝑠))))
4525, 44mpbird 259 1 ((𝐾 ∈ HL ∧ (𝑄𝐴𝑅𝐴𝑆𝐴) ∧ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅))) → ((𝑄 𝑅) 𝑆) ∈ 𝑃)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 208  wa 398  w3a 1083   = wceq 1533  wcel 2110  wne 3016  wrex 3139   class class class wbr 5059  cfv 6350  (class class class)co 7150  Basecbs 16477  lecple 16566  joincjn 17548  Latclat 17649  Atomscatm 36393  HLchlt 36480  LPlanesclpl 36622
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358  df-riota 7108  df-ov 7153  df-oprab 7154  df-proset 17532  df-poset 17550  df-plt 17562  df-lub 17578  df-glb 17579  df-join 17580  df-meet 17581  df-p0 17643  df-lat 17650  df-clat 17712  df-oposet 36306  df-ol 36308  df-oml 36309  df-covers 36396  df-ats 36397  df-atl 36428  df-cvlat 36452  df-hlat 36481  df-llines 36628  df-lplanes 36629
This theorem is referenced by:  islpln2a  36678  2llnjaN  36696  lvolnle3at  36712  dalem42  36844  cdleme16aN  37389
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