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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 13956 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 9 | 7, 8 | syl 14 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 10 | 1, 2, 3, 4, 5, 6, 9 | ghmgrp 13785 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 11 | ablcmn 13958 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 12 | 7, 11 | syl 14 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| 13 | 2, 3, 4, 5, 1, 6, 12 | ghmcmn 13994 | . 2 ⊢ (𝜑 → 𝐻 ∈ CMnd) |
| 14 | isabl 13955 | . 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 1005 = wceq 1398 ∈ wcel 2202 –onto→wfo 5331 ‘cfv 5333 (class class class)co 6028 Basecbs 13162 +gcplusg 13240 Grpcgrp 13663 CMndccmn 13951 Abelcabl 13952 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-cnex 8183 ax-resscn 8184 ax-1re 8186 ax-addrcl 8189 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-riota 5981 df-ov 6031 df-inn 9203 df-2 9261 df-ndx 13165 df-slot 13166 df-base 13168 df-plusg 13253 df-0g 13421 df-mgm 13519 df-sgrp 13565 df-mnd 13580 df-grp 13666 df-minusg 13667 df-cmn 13953 df-abl 13954 |
| This theorem is referenced by: (None) |
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