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Related theorems GIF version |
| Description: Commutative/associative law. |
| Ref | Expression |
|---|---|
| hvadd12t | ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ∧ C ∈ ℋ ) → (A +v (B +v C)) = (B +v (A +v C))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-hvcom 4985 | . . . 4 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ) → (A +v B) = (B +v A)) | |
| 2 | 1 | opreq1d 3012 | . . 3 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ) → ((A +v B) +v C) = ((B +v A) +v C)) |
| 3 | 2 | 3adant3 599 | . 2 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ∧ C ∈ ℋ ) → ((A +v B) +v C) = ((B +v A) +v C)) |
| 4 | ax-hvass 4986 | . 2 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ∧ C ∈ ℋ ) → ((A +v B) +v C) = (A +v (B +v C))) | |
| 5 | ax-hvass 4986 | . . 3 ⊢ ((B ∈ ℋ ∧ A ∈ ℋ ∧ C ∈ ℋ ) → ((B +v A) +v C) = (B +v (A +v C))) | |
| 6 | 5 | 3com12 614 | . 2 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ∧ C ∈ ℋ ) → ((B +v A) +v C) = (B +v (A +v C))) |
| 7 | 3, 4, 6 | 3eqtr3d 1133 | 1 ⊢ ((A ∈ ℋ ∧ B ∈ ℋ ∧ C ∈ ℋ ) → (A +v (B +v C)) = (B +v (A +v C))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∧ w3a 581 = wceq 1091 ∈ wcel 1092 (class class class)co 3001 ℋ chil 4958 +v cva 4959 |
| This theorem is referenced by: hvaddsub12t 5015 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 ax-hvcom 4985 ax-hvass 4986 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3an 583 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-xp 2424 df-cnv 2426 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fv 2438 df-opr 3003 |