| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 19899 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 9 | 7, 8 | syl 18 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 10 | 1, 2, 3, 4, 5, 6, 9 | ghmgrp 19176 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 11 | ablcmn 19901 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 12 | 7, 11 | syl 18 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| 13 | 2, 3, 4, 5, 1, 6, 12 | ghmcmn 19945 | . 2 ⊢ (𝜑 → 𝐻 ∈ CMnd) |
| 14 | isabl 19898 | . 2 ⊢ (𝐻 ∈ Abel ↔ (𝐻 ∈ Grp ∧ 𝐻 ∈ CMnd)) | |
| 15 | 10, 13, 14 | sylanbrc 595 | 1 ⊢ (𝜑 → 𝐻 ∈ Abel) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2146 –onto→wfo 6538 ‘cfv 6540 (class class class)co 7419 Basecbs 17291 +gcplusg 17332 Grpcgrp 19044 CMndccmn 19894 Abelcabl 19895 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-fo 6546 df-fv 6548 df-riota 7376 df-ov 7422 df-0g 17516 df-mgm 18720 df-sgrp 18809 df-mnd 18825 df-grp 19047 df-minusg 19048 df-cmn 19896 df-abl 19897 |
| This theorem is used by: efabl 26766 |
| Copyright terms: Public domain | W3C validator |