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Theorem shjcom 31972
Description: Commutative law for Hilbert lattice join of subspaces. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
Assertion
Ref Expression
shjcom ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐴 ∨ℋ 𝐵) = (𝐵 ∨ℋ 𝐴))

Proof of Theorem shjcom
StepHypRef Expression
1 shjval 31965 . 2 ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐴 ∨ℋ 𝐵) = (⊥‘(⊥‘(𝐴 ∪ 𝐵))))
2 shjval 31965 . . . 4 ((𝐵 ∈ Sℋ ∧ 𝐴 ∈ Sℋ ) → (𝐵 ∨ℋ 𝐴) = (⊥‘(⊥‘(𝐵 ∪ 𝐴))))
32ancoms 464 . . 3 ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐵 ∨ℋ 𝐴) = (⊥‘(⊥‘(𝐵 ∪ 𝐴))))
4 uncom 4159 . . . . 5 (𝐵 ∪ 𝐴) = (𝐴 ∪ 𝐵)
54fveq2i 6896 . . . 4 (⊥‘(𝐵 ∪ 𝐴)) = (⊥‘(𝐴 ∪ 𝐵))
65fveq2i 6896 . . 3 (⊥‘(⊥‘(𝐵 ∪ 𝐴))) = (⊥‘(⊥‘(𝐴 ∪ 𝐵)))
73, 6eqtrdi 2814 . 2 ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐵 ∨ℋ 𝐴) = (⊥‘(⊥‘(𝐴 ∪ 𝐵))))
81, 7eqtr4d 2801 1 ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐴 ∨ℋ 𝐵) = (𝐵 ∨ℋ 𝐴))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1569   ∈ wcel 2146   ∪ cun 4151  ‘cfv 6546  (class class class)co 7427   Sℋ csh 31542  ⊥cort 31544   ∨ℋ chj 31547
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-sep 5251  ax-nul 5262  ax-pr 5394  ax-hilex 31613
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 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3416  df-v 3455  df-sbc 3742  df-ss 3900  df-dif 4049  df-in 4093  df-un 4153  df-nul 4281  df-if 4485  df-pw 4561  df-sn 4588  df-pr 4590  df-op 4838  df-uni 4870  df-br 5106  df-opab 5170  df-id 5549  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-iota 6500  df-fun 6548  df-fv 6554  df-ov 7430  df-oprab 7431  df-mpo 7432  df-sh 31821  df-chj 31924
This theorem is used by:  shlej2  31975  shjcomi  31985  shub2  31997  chjcom  32120
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