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Theorem latj13 16921
 Description: Swap 1st and 3rd members of lattice join. (Contributed by NM, 4-Jun-2012.)
Hypotheses
Ref Expression
latjass.b 𝐵 = (Base‘𝐾)
latjass.j = (join‘𝐾)
Assertion
Ref Expression
latj13 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍)) = (𝑍 (𝑌 𝑋)))

Proof of Theorem latj13
StepHypRef Expression
1 simpl 472 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝐾 ∈ Lat)
2 simpr2 1061 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑌𝐵)
3 simpr3 1062 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑍𝐵)
4 simpr1 1060 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → 𝑋𝐵)
5 latjass.b . . . 4 𝐵 = (Base‘𝐾)
6 latjass.j . . . 4 = (join‘𝐾)
75, 6latj32 16920 . . 3 ((𝐾 ∈ Lat ∧ (𝑌𝐵𝑍𝐵𝑋𝐵)) → ((𝑌 𝑍) 𝑋) = ((𝑌 𝑋) 𝑍))
81, 2, 3, 4, 7syl13anc 1320 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑌 𝑍) 𝑋) = ((𝑌 𝑋) 𝑍))
95, 6latjcl 16874 . . . 4 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑍𝐵) → (𝑌 𝑍) ∈ 𝐵)
1093adant3r1 1266 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑍) ∈ 𝐵)
115, 6latjcom 16882 . . 3 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ (𝑌 𝑍) ∈ 𝐵) → (𝑋 (𝑌 𝑍)) = ((𝑌 𝑍) 𝑋))
121, 4, 10, 11syl3anc 1318 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍)) = ((𝑌 𝑍) 𝑋))
135, 6latjcl 16874 . . . 4 ((𝐾 ∈ Lat ∧ 𝑌𝐵𝑋𝐵) → (𝑌 𝑋) ∈ 𝐵)
141, 2, 4, 13syl3anc 1318 . . 3 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑌 𝑋) ∈ 𝐵)
155, 6latjcom 16882 . . 3 ((𝐾 ∈ Lat ∧ 𝑍𝐵 ∧ (𝑌 𝑋) ∈ 𝐵) → (𝑍 (𝑌 𝑋)) = ((𝑌 𝑋) 𝑍))
161, 3, 14, 15syl3anc 1318 . 2 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑍 (𝑌 𝑋)) = ((𝑌 𝑋) 𝑍))
178, 12, 163eqtr4d 2654 1 ((𝐾 ∈ Lat ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 (𝑌 𝑍)) = (𝑍 (𝑌 𝑋)))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ‘cfv 5804  (class class class)co 6549  Basecbs 15695  joincjn 16767  Latclat 16868 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-preset 16751  df-poset 16769  df-lub 16797  df-glb 16798  df-join 16799  df-meet 16800  df-lat 16869 This theorem is referenced by:  3atlem1  33787  dalawlem3  34177  dalawlem6  34180  cdleme1  34532  cdleme11g  34570
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