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| Mirrors > Home > ILE Home > Th. List > ghmabl | GIF version | ||
| Description: The image of an abelian group 𝐺 under a group homomorphism 𝐹 is an abelian group. (Contributed by Mario Carneiro, 12-May-2014.) (Revised by Thierry Arnoux, 26-Jan-2020.) |
| Ref | Expression |
|---|---|
| ghmabl.x | ⊢ 𝑋 = (Base‘𝐺) |
| ghmabl.y | ⊢ 𝑌 = (Base‘𝐻) |
| ghmabl.p | ⊢ + = (+g‘𝐺) |
| ghmabl.q | ⊢ ⨣ = (+g‘𝐻) |
| ghmabl.f | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) |
| ghmabl.1 | ⊢ (𝜑 → 𝐹:𝑋–onto→𝑌) |
| ghmabl.3 | ⊢ (𝜑 → 𝐺 ∈ Abel) |
| Ref | Expression |
|---|---|
| ghmabl | ⊢ (𝜑 → 𝐻 ∈ Abel) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ghmabl.f | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) | |
| 2 | ghmabl.x | . . 3 ⊢ 𝑋 = (Base‘𝐺) | |
| 3 | ghmabl.y | . . 3 ⊢ 𝑌 = (Base‘𝐻) | |
| 4 | ghmabl.p | . . 3 ⊢ + = (+g‘𝐺) | |
| 5 | ghmabl.q | . . 3 ⊢ ⨣ = (+g‘𝐻) | |
| 6 | ghmabl.1 | . . 3 ⊢ (𝜑 → 𝐹:𝑋–onto→𝑌) | |
| 7 | ghmabl.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ Abel) | |
| 8 | ablgrp 13419 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 9 | 7, 8 | syl 14 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 10 | 1, 2, 3, 4, 5, 6, 9 | ghmgrp 13248 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 11 | ablcmn 13421 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 12 | 7, 11 | syl 14 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| 13 | 2, 3, 4, 5, 1, 6, 12 | ghmcmn 13457 | . 2 ⊢ (𝜑 → 𝐻 ∈ CMnd) |
| 14 | isabl 13418 | . 2 ⊢ (𝐻 ∈ Abel ↔ (𝐻 ∈ Grp ∧ 𝐻 ∈ CMnd)) | |
| 15 | 10, 13, 14 | sylanbrc 417 | 1 ⊢ (𝜑 → 𝐻 ∈ Abel) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ w3a 980 = wceq 1364 ∈ wcel 2167 –onto→wfo 5256 ‘cfv 5258 (class class class)co 5922 Basecbs 12678 +gcplusg 12755 Grpcgrp 13132 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-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4148 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-cnex 7970 ax-resscn 7971 ax-1re 7973 ax-addrcl 7976 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-int 3875 df-iun 3918 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-ima 4676 df-iota 5219 df-fun 5260 df-fn 5261 df-f 5262 df-f1 5263 df-fo 5264 df-f1o 5265 df-fv 5266 df-riota 5877 df-ov 5925 df-inn 8991 df-2 9049 df-ndx 12681 df-slot 12682 df-base 12684 df-plusg 12768 df-0g 12929 df-mgm 12999 df-sgrp 13045 df-mnd 13058 df-grp 13135 df-minusg 13136 df-cmn 13416 df-abl 13417 |
| This theorem is referenced by: (None) |
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