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| Mirrors > Home > MPE Home > Th. List > ghmabl | Structured version Visualization version 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 19699 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 9 | 7, 8 | syl 17 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 10 | 1, 2, 3, 4, 5, 6, 9 | ghmgrp 18980 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 11 | ablcmn 19701 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 12 | 7, 11 | syl 17 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| 13 | 2, 3, 4, 5, 1, 6, 12 | ghmcmn 19745 | . 2 ⊢ (𝜑 → 𝐻 ∈ CMnd) |
| 14 | isabl 19698 | . 2 ⊢ (𝐻 ∈ Abel ↔ (𝐻 ∈ Grp ∧ 𝐻 ∈ CMnd)) | |
| 15 | 10, 13, 14 | sylanbrc 583 | 1 ⊢ (𝜑 → 𝐻 ∈ Abel) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 –onto→wfo 6497 ‘cfv 6499 (class class class)co 7369 Basecbs 17155 +gcplusg 17196 Grpcgrp 18847 CMndccmn 19694 Abelcabl 19695 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-fo 6505 df-fv 6507 df-riota 7326 df-ov 7372 df-0g 17380 df-mgm 18549 df-sgrp 18628 df-mnd 18644 df-grp 18850 df-minusg 18851 df-cmn 19696 df-abl 19697 |
| This theorem is referenced by: efabl 26492 |
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