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| Mirrors > Home > ILE Home > Th. List > ablcom | GIF version | ||
| Description: An Abelian group operation is commutative. (Contributed by NM, 26-Aug-2011.) | 
| Ref | Expression | 
|---|---|
| ablcom.b | ⊢ 𝐵 = (Base‘𝐺) | 
| ablcom.p | ⊢ + = (+g‘𝐺) | 
| Ref | Expression | 
|---|---|
| ablcom | ⊢ ((𝐺 ∈ Abel ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) = (𝑌 + 𝑋)) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | ablcmn 13421 | . 2 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 2 | ablcom.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 3 | ablcom.p | . . 3 ⊢ + = (+g‘𝐺) | |
| 4 | 2, 3 | cmncom 13432 | . 2 ⊢ ((𝐺 ∈ CMnd ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) = (𝑌 + 𝑋)) | 
| 5 | 1, 4 | syl3an1 1282 | 1 ⊢ ((𝐺 ∈ Abel ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) = (𝑌 + 𝑋)) | 
| Colors of variables: wff set class | 
| Syntax hints: → wi 4 ∧ w3a 980 = wceq 1364 ∈ wcel 2167 ‘cfv 5258 (class class class)co 5922 Basecbs 12678 +gcplusg 12755 CMndccmn 13414 Abelcabl 13415 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 | 
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-un 3161 df-in 3163 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-br 4034 df-iota 5219 df-fv 5266 df-ov 5925 df-cmn 13416 df-abl 13417 | 
| This theorem is referenced by: ablinvadd 13440 ablsub2inv 13441 ablsubadd 13442 abladdsub 13445 ablpncan3 13447 ablsub32 13452 ablnnncan 13453 ablsubsub23 13455 eqgabl 13460 subgabl 13462 ablnsg 13464 ablressid 13465 imasabl 13466 subrngringnsg 13761 | 
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