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Theorem hvadd12i 28843
Description: Hilbert vector space commutative/associative law. (Contributed by NM, 11-Sep-1999.) (New usage is discouraged.)
Hypotheses
Ref Expression
hvass.1 𝐴 ∈ ℋ
hvass.2 𝐵 ∈ ℋ
hvass.3 𝐶 ∈ ℋ
Assertion
Ref Expression
hvadd12i (𝐴 + (𝐵 + 𝐶)) = (𝐵 + (𝐴 + 𝐶))

Proof of Theorem hvadd12i
StepHypRef Expression
1 hvass.1 . . . 4 𝐴 ∈ ℋ
2 hvass.2 . . . 4 𝐵 ∈ ℋ
31, 2hvcomi 28805 . . 3 (𝐴 + 𝐵) = (𝐵 + 𝐴)
43oveq1i 7149 . 2 ((𝐴 + 𝐵) + 𝐶) = ((𝐵 + 𝐴) + 𝐶)
5 hvass.3 . . 3 𝐶 ∈ ℋ
61, 2, 5hvassi 28839 . 2 ((𝐴 + 𝐵) + 𝐶) = (𝐴 + (𝐵 + 𝐶))
72, 1, 5hvassi 28839 . 2 ((𝐵 + 𝐴) + 𝐶) = (𝐵 + (𝐴 + 𝐶))
84, 6, 73eqtr3i 2832 1 (𝐴 + (𝐵 + 𝐶)) = (𝐵 + (𝐴 + 𝐶))
Colors of variables: wff setvar class
Syntax hints:   = wceq 1538  wcel 2112  (class class class)co 7139  chba 28705   + cva 28706
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2114  ax-9 2122  ax-ext 2773  ax-hvcom 28787  ax-hvass 28788
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-ex 1782  df-sb 2070  df-clab 2780  df-cleq 2794  df-clel 2873  df-v 3446  df-un 3889  df-in 3891  df-ss 3901  df-sn 4529  df-pr 4531  df-op 4535  df-uni 4804  df-br 5034  df-iota 6287  df-fv 6336  df-ov 7142
This theorem is referenced by:  hvsubaddi  28852
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