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Theorem latjass 17684
Description: Lattice join is associative. Lemma 2.2 in [MegPav2002] p. 362. (chjass 29295 analog.) (Contributed by NM, 17-Sep-2011.)
Hypotheses
Ref Expression
latjass.b 𝐵 = (Base‘𝐾)
latjass.j = (join‘𝐾)
Assertion
Ref Expression
latjass ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍) = (𝑋 (𝑌 𝑍)))

Proof of Theorem latjass
StepHypRef Expression
1 latjass.b . 2 𝐵 = (Base‘𝐾)
2 eqid 2820 . 2 (le‘𝐾) = (le‘𝐾)
3 simpl 485 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝐾 ∈ Lat)
4 latjass.j . . . . 5 = (join‘𝐾)
51, 4latjcl 17640 . . . 4 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
653adant3r3 1180 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌) ∈ 𝐵)
7 simpr3 1192 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍𝐵)
81, 4latjcl 17640 . . 3 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → ((𝑋 𝑌) 𝑍) ∈ 𝐵)
93, 6, 7, 8syl3anc 1367 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍) ∈ 𝐵)
10 simpr1 1190 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋𝐵)
111, 4latjcl 17640 . . . 4 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → (𝑌 𝑍) ∈ 𝐵)
12113adant3r1 1178 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍) ∈ 𝐵)
131, 4latjcl 17640 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → (𝑋 (𝑌 𝑍)) ∈ 𝐵)
143, 10, 12, 13syl3anc 1367 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍)) ∈ 𝐵)
151, 2, 4latlej1 17649 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)))
163, 10, 12, 15syl3anc 1367 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)))
17 simpr2 1191 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌𝐵)
181, 2, 4latlej1 17649 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → 𝑌(le‘𝐾)(𝑌 𝑍))
19183adant3r1 1178 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑌 𝑍))
201, 2, 4latlej2 17650 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → (𝑌 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
213, 10, 12, 20syl3anc 1367 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
221, 2, 3, 17, 12, 14, 19, 21lattrd 17647 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑋 (𝑌 𝑍)))
231, 2, 4latjle12 17651 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵 ∧ (𝑋 (𝑌 𝑍)) ∈ 𝐵)) → ((𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)) ∧ 𝑌(le‘𝐾)(𝑋 (𝑌 𝑍))) ↔ (𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍))))
243, 10, 17, 14, 23syl13anc 1368 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)) ∧ 𝑌(le‘𝐾)(𝑋 (𝑌 𝑍))) ↔ (𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍))))
2516, 22, 24mpbi2and 710 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍)))
261, 2, 4latlej2 17650 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → 𝑍(le‘𝐾)(𝑌 𝑍))
27263adant3r1 1178 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)(𝑌 𝑍))
281, 2, 3, 7, 12, 14, 27, 21lattrd 17647 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)(𝑋 (𝑌 𝑍)))
291, 2, 4latjle12 17651 . . . 4 ((𝐾 ∈ Lat ∧ ((𝑋 𝑌) ∈ 𝐵𝑍𝐵 ∧ (𝑋 (𝑌 𝑍)) ∈ 𝐵)) → (((𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍)) ∧ 𝑍(le‘𝐾)(𝑋 (𝑌 𝑍))) ↔ ((𝑋 𝑌) 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍))))
303, 6, 7, 14, 29syl13anc 1368 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (((𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍)) ∧ 𝑍(le‘𝐾)(𝑋 (𝑌 𝑍))) ↔ ((𝑋 𝑌) 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍))))
3125, 28, 30mpbi2and 710 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
321, 2, 4latlej1 17649 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝑋(le‘𝐾)(𝑋 𝑌))
33323adant3r3 1180 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)(𝑋 𝑌))
341, 2, 4latlej1 17649 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → (𝑋 𝑌)(le‘𝐾)((𝑋 𝑌) 𝑍))
353, 6, 7, 34syl3anc 1367 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌)(le‘𝐾)((𝑋 𝑌) 𝑍))
361, 2, 3, 10, 6, 9, 33, 35lattrd 17647 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)((𝑋 𝑌) 𝑍))
371, 2, 4latlej2 17650 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝑌(le‘𝐾)(𝑋 𝑌))
38373adant3r3 1180 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑋 𝑌))
391, 2, 3, 17, 6, 9, 38, 35lattrd 17647 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)((𝑋 𝑌) 𝑍))
401, 2, 4latlej2 17650 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍))
413, 6, 7, 40syl3anc 1367 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍))
421, 2, 4latjle12 17651 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑌𝐵𝑍𝐵 ∧ ((𝑋 𝑌) 𝑍) ∈ 𝐵)) → ((𝑌(le‘𝐾)((𝑋 𝑌) 𝑍) ∧ 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍)) ↔ (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍)))
433, 17, 7, 9, 42syl13anc 1368 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑌(le‘𝐾)((𝑋 𝑌) 𝑍) ∧ 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍)) ↔ (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍)))
4439, 41, 43mpbi2and 710 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍))
451, 2, 4latjle12 17651 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵 ∧ ((𝑋 𝑌) 𝑍) ∈ 𝐵)) → ((𝑋(le‘𝐾)((𝑋 𝑌) 𝑍) ∧ (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍)) ↔ (𝑋 (𝑌 𝑍))(le‘𝐾)((𝑋 𝑌) 𝑍)))
463, 10, 12, 9, 45syl13anc 1368 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋(le‘𝐾)((𝑋 𝑌) 𝑍) ∧ (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍)) ↔ (𝑋 (𝑌 𝑍))(le‘𝐾)((𝑋 𝑌) 𝑍)))
4736, 44, 46mpbi2and 710 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍))(le‘𝐾)((𝑋 𝑌) 𝑍))
481, 2, 3, 9, 14, 31, 47latasymd 17646 1 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍) = (𝑋 (𝑌 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 398  w3a 1083   = wceq 1537  wcel 2114   class class class wbr 5042  cfv 6331  (class class class)co 7133  Basecbs 16462  lecple 16551  joincjn 17533  Latclat 17634
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 2792  ax-rep 5166  ax-sep 5179  ax-nul 5186  ax-pow 5242  ax-pr 5306  ax-un 7439
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 2653  df-clab 2799  df-cleq 2813  df-clel 2891  df-nfc 2959  df-ne 3007  df-ral 3130  df-rex 3131  df-reu 3132  df-rab 3134  df-v 3475  df-sbc 3753  df-csb 3861  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4270  df-if 4444  df-pw 4517  df-sn 4544  df-pr 4546  df-op 4550  df-uni 4815  df-iun 4897  df-br 5043  df-opab 5105  df-mpt 5123  df-id 5436  df-xp 5537  df-rel 5538  df-cnv 5539  df-co 5540  df-dm 5541  df-rn 5542  df-res 5543  df-ima 5544  df-iota 6290  df-fun 6333  df-fn 6334  df-f 6335  df-f1 6336  df-fo 6337  df-f1o 6338  df-fv 6339  df-riota 7091  df-ov 7136  df-oprab 7137  df-proset 17517  df-poset 17535  df-lub 17563  df-glb 17564  df-join 17565  df-meet 17566  df-lat 17635
This theorem is referenced by:  latj12  17685  latj32  17686  latj4  17690  latmass  17777  latmassOLD  36401  hlatjass  36542  cvrexchlem  36591  cvrat3  36614  2atmat  36733  4atlem3  36768  4atlem3a  36769  4atlem4a  36771  4atlem4d  36774  4at2  36786  2lplnja  36791  pmapjlln1  37027  dalawlem3  37045  dalawlem12  37054  cdleme30a  37550  trlcolem  37898  cdlemh1  37987  cdlemkid1  38094  doca2N  38298  djajN  38309
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