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Mirrors > Home > MPE Home > Th. List > ringrghm | Structured version Visualization version GIF version |
Description: Right-multiplication in a ring by a fixed element of the ring is a group homomorphism. (It is not usually a ring homomorphism.) (Contributed by Mario Carneiro, 4-May-2015.) |
Ref | Expression |
---|---|
ringlghm.b | ⊢ 𝐵 = (Base‘𝑅) |
ringlghm.t | ⊢ · = (.r‘𝑅) |
Ref | Expression |
---|---|
ringrghm | ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) → (𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋)) ∈ (𝑅 GrpHom 𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ringlghm.b | . 2 ⊢ 𝐵 = (Base‘𝑅) | |
2 | eqid 2738 | . 2 ⊢ (+g‘𝑅) = (+g‘𝑅) | |
3 | ringgrp 19591 | . . 3 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ Grp) | |
4 | 3 | adantr 484 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) → 𝑅 ∈ Grp) |
5 | ringlghm.t | . . . . . 6 ⊢ · = (.r‘𝑅) | |
6 | 1, 5 | ringcl 19603 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → (𝑥 · 𝑋) ∈ 𝐵) |
7 | 6 | 3expa 1120 | . . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵) ∧ 𝑋 ∈ 𝐵) → (𝑥 · 𝑋) ∈ 𝐵) |
8 | 7 | an32s 652 | . . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ 𝑥 ∈ 𝐵) → (𝑥 · 𝑋) ∈ 𝐵) |
9 | 8 | fmpttd 6950 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) → (𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋)):𝐵⟶𝐵) |
10 | df-3an 1091 | . . . . 5 ⊢ ((𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) ↔ ((𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵) ∧ 𝑋 ∈ 𝐵)) | |
11 | 1, 2, 5 | ringdir 19609 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵)) → ((𝑦(+g‘𝑅)𝑧) · 𝑋) = ((𝑦 · 𝑋)(+g‘𝑅)(𝑧 · 𝑋))) |
12 | 10, 11 | sylan2br 598 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ ((𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵) ∧ 𝑋 ∈ 𝐵)) → ((𝑦(+g‘𝑅)𝑧) · 𝑋) = ((𝑦 · 𝑋)(+g‘𝑅)(𝑧 · 𝑋))) |
13 | 12 | anass1rs 655 | . . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑦(+g‘𝑅)𝑧) · 𝑋) = ((𝑦 · 𝑋)(+g‘𝑅)(𝑧 · 𝑋))) |
14 | 1, 2 | ringacl 19620 | . . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵) → (𝑦(+g‘𝑅)𝑧) ∈ 𝐵) |
15 | 14 | 3expb 1122 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → (𝑦(+g‘𝑅)𝑧) ∈ 𝐵) |
16 | 15 | adantlr 715 | . . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → (𝑦(+g‘𝑅)𝑧) ∈ 𝐵) |
17 | oveq1 7238 | . . . . 5 ⊢ (𝑥 = (𝑦(+g‘𝑅)𝑧) → (𝑥 · 𝑋) = ((𝑦(+g‘𝑅)𝑧) · 𝑋)) | |
18 | eqid 2738 | . . . . 5 ⊢ (𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋)) = (𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋)) | |
19 | ovex 7264 | . . . . 5 ⊢ ((𝑦(+g‘𝑅)𝑧) · 𝑋) ∈ V | |
20 | 17, 18, 19 | fvmpt 6836 | . . . 4 ⊢ ((𝑦(+g‘𝑅)𝑧) ∈ 𝐵 → ((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘(𝑦(+g‘𝑅)𝑧)) = ((𝑦(+g‘𝑅)𝑧) · 𝑋)) |
21 | 16, 20 | syl 17 | . . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘(𝑦(+g‘𝑅)𝑧)) = ((𝑦(+g‘𝑅)𝑧) · 𝑋)) |
22 | oveq1 7238 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 · 𝑋) = (𝑦 · 𝑋)) | |
23 | ovex 7264 | . . . . . 6 ⊢ (𝑦 · 𝑋) ∈ V | |
24 | 22, 18, 23 | fvmpt 6836 | . . . . 5 ⊢ (𝑦 ∈ 𝐵 → ((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑦) = (𝑦 · 𝑋)) |
25 | oveq1 7238 | . . . . . 6 ⊢ (𝑥 = 𝑧 → (𝑥 · 𝑋) = (𝑧 · 𝑋)) | |
26 | ovex 7264 | . . . . . 6 ⊢ (𝑧 · 𝑋) ∈ V | |
27 | 25, 18, 26 | fvmpt 6836 | . . . . 5 ⊢ (𝑧 ∈ 𝐵 → ((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑧) = (𝑧 · 𝑋)) |
28 | 24, 27 | oveqan12d 7250 | . . . 4 ⊢ ((𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵) → (((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑦)(+g‘𝑅)((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑧)) = ((𝑦 · 𝑋)(+g‘𝑅)(𝑧 · 𝑋))) |
29 | 28 | adantl 485 | . . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → (((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑦)(+g‘𝑅)((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑧)) = ((𝑦 · 𝑋)(+g‘𝑅)(𝑧 · 𝑋))) |
30 | 13, 21, 29 | 3eqtr4d 2788 | . 2 ⊢ (((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) ∧ (𝑦 ∈ 𝐵 ∧ 𝑧 ∈ 𝐵)) → ((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘(𝑦(+g‘𝑅)𝑧)) = (((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑦)(+g‘𝑅)((𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋))‘𝑧))) |
31 | 1, 1, 2, 2, 4, 4, 9, 30 | isghmd 18655 | 1 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐵) → (𝑥 ∈ 𝐵 ↦ (𝑥 · 𝑋)) ∈ (𝑅 GrpHom 𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2111 ↦ cmpt 5149 ‘cfv 6397 (class class class)co 7231 Basecbs 16784 +gcplusg 16826 .rcmulr 16827 Grpcgrp 18389 GrpHom cghm 18643 Ringcrg 19586 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2159 ax-12 2176 ax-ext 2709 ax-rep 5193 ax-sep 5206 ax-nul 5213 ax-pow 5272 ax-pr 5336 ax-un 7541 ax-cnex 10809 ax-resscn 10810 ax-1cn 10811 ax-icn 10812 ax-addcl 10813 ax-addrcl 10814 ax-mulcl 10815 ax-mulrcl 10816 ax-mulcom 10817 ax-addass 10818 ax-mulass 10819 ax-distr 10820 ax-i2m1 10821 ax-1ne0 10822 ax-1rid 10823 ax-rnegex 10824 ax-rrecex 10825 ax-cnre 10826 ax-pre-lttri 10827 ax-pre-lttrn 10828 ax-pre-ltadd 10829 ax-pre-mulgt0 10830 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2072 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3067 df-rex 3068 df-reu 3069 df-rab 3071 df-v 3422 df-sbc 3709 df-csb 3826 df-dif 3883 df-un 3885 df-in 3887 df-ss 3897 df-pss 3899 df-nul 4252 df-if 4454 df-pw 4529 df-sn 4556 df-pr 4558 df-tp 4560 df-op 4562 df-uni 4834 df-iun 4920 df-br 5068 df-opab 5130 df-mpt 5150 df-tr 5176 df-id 5469 df-eprel 5474 df-po 5482 df-so 5483 df-fr 5523 df-we 5525 df-xp 5571 df-rel 5572 df-cnv 5573 df-co 5574 df-dm 5575 df-rn 5576 df-res 5577 df-ima 5578 df-pred 6175 df-ord 6233 df-on 6234 df-lim 6235 df-suc 6236 df-iota 6355 df-fun 6399 df-fn 6400 df-f 6401 df-f1 6402 df-fo 6403 df-f1o 6404 df-fv 6405 df-riota 7188 df-ov 7234 df-oprab 7235 df-mpo 7236 df-om 7663 df-wrecs 8067 df-recs 8128 df-rdg 8166 df-er 8411 df-en 8647 df-dom 8648 df-sdom 8649 df-pnf 10893 df-mnf 10894 df-xr 10895 df-ltxr 10896 df-le 10897 df-sub 11088 df-neg 11089 df-nn 11855 df-2 11917 df-sets 16741 df-slot 16759 df-ndx 16769 df-base 16785 df-plusg 16839 df-mgm 18138 df-sgrp 18187 df-mnd 18198 df-grp 18392 df-ghm 18644 df-mgp 19529 df-ring 19588 |
This theorem is referenced by: gsummulc1 19648 fidomndrnglem 20368 |
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