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Theorem latjass 16867
Description: Lattice join is associative. Lemma 2.2 in [MegPav2002] p. 362. (chjass 27610 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 2609 . 2 (le‘𝐾) = (le‘𝐾)
3 simpl 471 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝐾 ∈ Lat)
4 latjass.j . . . . 5 = (join‘𝐾)
51, 4latjcl 16823 . . . 4 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
653adant3r3 1267 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌) ∈ 𝐵)
7 simpr3 1061 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍𝐵)
81, 4latjcl 16823 . . 3 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → ((𝑋 𝑌) 𝑍) ∈ 𝐵)
93, 6, 7, 8syl3anc 1317 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍) ∈ 𝐵)
10 simpr1 1059 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋𝐵)
111, 4latjcl 16823 . . . 4 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → (𝑌 𝑍) ∈ 𝐵)
12113adant3r1 1265 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍) ∈ 𝐵)
131, 4latjcl 16823 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → (𝑋 (𝑌 𝑍)) ∈ 𝐵)
143, 10, 12, 13syl3anc 1317 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍)) ∈ 𝐵)
151, 2, 4latlej1 16832 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)))
163, 10, 12, 15syl3anc 1317 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)(𝑋 (𝑌 𝑍)))
17 simpr2 1060 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌𝐵)
181, 2, 4latlej1 16832 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → 𝑌(le‘𝐾)(𝑌 𝑍))
19183adant3r1 1265 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑌 𝑍))
201, 2, 4latlej2 16833 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → (𝑌 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
213, 10, 12, 20syl3anc 1317 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
221, 2, 3, 17, 12, 14, 19, 21lattrd 16830 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑋 (𝑌 𝑍)))
231, 2, 4latjle12 16834 . . . . 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 1319 . . . 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 957 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌)(le‘𝐾)(𝑋 (𝑌 𝑍)))
261, 2, 4latlej2 16833 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → 𝑍(le‘𝐾)(𝑌 𝑍))
27263adant3r1 1265 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)(𝑌 𝑍))
281, 2, 3, 7, 12, 14, 27, 21lattrd 16830 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)(𝑋 (𝑌 𝑍)))
291, 2, 4latjle12 16834 . . . 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 1319 . . 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 957 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍)(le‘𝐾)(𝑋 (𝑌 𝑍)))
321, 2, 4latlej1 16832 . . . . 5 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝑋(le‘𝐾)(𝑋 𝑌))
33323adant3r3 1267 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)(𝑋 𝑌))
341, 2, 4latlej1 16832 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → (𝑋 𝑌)(le‘𝐾)((𝑋 𝑌) 𝑍))
353, 6, 7, 34syl3anc 1317 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 𝑌)(le‘𝐾)((𝑋 𝑌) 𝑍))
361, 2, 3, 10, 6, 9, 33, 35lattrd 16830 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋(le‘𝐾)((𝑋 𝑌) 𝑍))
371, 2, 4latlej2 16833 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → 𝑌(le‘𝐾)(𝑋 𝑌))
38373adant3r3 1267 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)(𝑋 𝑌))
391, 2, 3, 17, 6, 9, 38, 35lattrd 16830 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌(le‘𝐾)((𝑋 𝑌) 𝑍))
401, 2, 4latlej2 16833 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋 𝑌) ∈ 𝐵𝑍𝐵) → 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍))
413, 6, 7, 40syl3anc 1317 . . . 4 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍(le‘𝐾)((𝑋 𝑌) 𝑍))
421, 2, 4latjle12 16834 . . . . 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 1319 . . . 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 957 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍)(le‘𝐾)((𝑋 𝑌) 𝑍))
451, 2, 4latjle12 16834 . . . 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 1319 . . 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 957 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍))(le‘𝐾)((𝑋 𝑌) 𝑍))
481, 2, 3, 9, 14, 31, 47latasymd 16829 1 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 𝑌) 𝑍) = (𝑋 (𝑌 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 194  wa 382  w3a 1030   = wceq 1474  wcel 1976   class class class wbr 4577  cfv 5790  (class class class)co 6527  Basecbs 15644  lecple 15724  joincjn 16716  Latclat 16817
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1712  ax-4 1727  ax-5 1826  ax-6 1874  ax-7 1921  ax-8 1978  ax-9 1985  ax-10 2005  ax-11 2020  ax-12 2033  ax-13 2233  ax-ext 2589  ax-rep 4693  ax-sep 4703  ax-nul 4712  ax-pow 4764  ax-pr 4828  ax-un 6825
This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  df-3an 1032  df-tru 1477  df-ex 1695  df-nf 1700  df-sb 1867  df-eu 2461  df-mo 2462  df-clab 2596  df-cleq 2602  df-clel 2605  df-nfc 2739  df-ne 2781  df-ral 2900  df-rex 2901  df-reu 2902  df-rab 2904  df-v 3174  df-sbc 3402  df-csb 3499  df-dif 3542  df-un 3544  df-in 3546  df-ss 3553  df-nul 3874  df-if 4036  df-pw 4109  df-sn 4125  df-pr 4127  df-op 4131  df-uni 4367  df-iun 4451  df-br 4578  df-opab 4638  df-mpt 4639  df-id 4943  df-xp 5034  df-rel 5035  df-cnv 5036  df-co 5037  df-dm 5038  df-rn 5039  df-res 5040  df-ima 5041  df-iota 5754  df-fun 5792  df-fn 5793  df-f 5794  df-f1 5795  df-fo 5796  df-f1o 5797  df-fv 5798  df-riota 6489  df-ov 6530  df-oprab 6531  df-preset 16700  df-poset 16718  df-lub 16746  df-glb 16747  df-join 16748  df-meet 16749  df-lat 16818
This theorem is referenced by:  latj12  16868  latj32  16869  latj4  16873  latmass  16960  latmassOLD  33358  hlatjass  33498  cvrexchlem  33547  cvrat3  33570  2atmat  33689  4atlem3  33724  4atlem3a  33725  4atlem4a  33727  4atlem4d  33730  4at2  33742  2lplnja  33747  pmapjlln1  33983  dalawlem3  34001  dalawlem12  34010  cdleme30a  34508  trlcolem  34856  cdlemh1  34945  cdlemkid1  35052  doca2N  35257  djajN  35268
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