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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 19697 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 9 | 7, 8 | syl 17 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 10 | 1, 2, 3, 4, 5, 6, 9 | ghmgrp 18979 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 11 | ablcmn 19699 | . . . 4 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ CMnd) | |
| 12 | 7, 11 | syl 17 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| 13 | 2, 3, 4, 5, 1, 6, 12 | ghmcmn 19743 | . 2 ⊢ (𝜑 → 𝐻 ∈ CMnd) |
| 14 | isabl 19696 | . 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 1541 ∈ wcel 2111 –onto→wfo 6479 ‘cfv 6481 (class class class)co 7346 Basecbs 17120 +gcplusg 17161 Grpcgrp 18846 CMndccmn 19692 Abelcabl 19693 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5090 df-opab 5152 df-mpt 5171 df-id 5509 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-fo 6487 df-fv 6489 df-riota 7303 df-ov 7349 df-0g 17345 df-mgm 18548 df-sgrp 18627 df-mnd 18643 df-grp 18849 df-minusg 18850 df-cmn 19694 df-abl 19695 |
| This theorem is referenced by: efabl 26486 |
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