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| Mirrors > Home > MPE Home > Th. List > isridl | Structured version Visualization version GIF version | ||
| Description: A right ideal is a left ideal of the opposite ring. This theorem shows that this definition corresponds to the usual textbook definition of a right ideal of a ring to be a subgroup of the additive group of the ring which is closed under right-multiplication by elements of the full ring. (Contributed by AV, 13-Feb-2025.) |
| Ref | Expression |
|---|---|
| isridl.u | ⊢ 𝑈 = (LIdeal‘(oppr‘𝑅)) |
| isridl.b | ⊢ 𝐵 = (Base‘𝑅) |
| isridl.t | ⊢ · = (.r‘𝑅) |
| Ref | Expression |
|---|---|
| isridl | ⊢ (𝑅 ∈ Ring → (𝐼 ∈ 𝑈 ↔ (𝐼 ∈ (SubGrp‘𝑅) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑦 · 𝑥) ∈ 𝐼))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2765 | . . . 4 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
| 2 | 1 | opprring 20417 | . . 3 ⊢ (𝑅 ∈ Ring → (oppr‘𝑅) ∈ Ring) |
| 3 | isridl.u | . . . 4 ⊢ 𝑈 = (LIdeal‘(oppr‘𝑅)) | |
| 4 | isridl.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑅) | |
| 5 | 1, 4 | opprbas 20413 | . . . 4 ⊢ 𝐵 = (Base‘(oppr‘𝑅)) |
| 6 | eqid 2765 | . . . 4 ⊢ (.r‘(oppr‘𝑅)) = (.r‘(oppr‘𝑅)) | |
| 7 | 3, 5, 6 | dflidl2 21319 | . . 3 ⊢ ((oppr‘𝑅) ∈ Ring → (𝐼 ∈ 𝑈 ↔ (𝐼 ∈ (SubGrp‘(oppr‘𝑅)) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼))) |
| 8 | 2, 7 | syl 18 | . 2 ⊢ (𝑅 ∈ Ring → (𝐼 ∈ 𝑈 ↔ (𝐼 ∈ (SubGrp‘(oppr‘𝑅)) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼))) |
| 9 | 1 | opprsubg 20422 | . . . . . 6 ⊢ (SubGrp‘𝑅) = (SubGrp‘(oppr‘𝑅)) |
| 10 | 9 | eqcomi 2774 | . . . . 5 ⊢ (SubGrp‘(oppr‘𝑅)) = (SubGrp‘𝑅) |
| 11 | 10 | a1i 11 | . . . 4 ⊢ (𝑅 ∈ Ring → (SubGrp‘(oppr‘𝑅)) = (SubGrp‘𝑅)) |
| 12 | 11 | eleq2d 2851 | . . 3 ⊢ (𝑅 ∈ Ring → (𝐼 ∈ (SubGrp‘(oppr‘𝑅)) ↔ 𝐼 ∈ (SubGrp‘𝑅))) |
| 13 | isridl.t | . . . . . . . 8 ⊢ · = (.r‘𝑅) | |
| 14 | 4, 13, 1, 6 | opprmul 20410 | . . . . . . 7 ⊢ (𝑥(.r‘(oppr‘𝑅))𝑦) = (𝑦 · 𝑥) |
| 15 | 14 | eleq1i 2856 | . . . . . 6 ⊢ ((𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼 ↔ (𝑦 · 𝑥) ∈ 𝐼) |
| 16 | 15 | a1i 11 | . . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐼) → ((𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼 ↔ (𝑦 · 𝑥) ∈ 𝐼)) |
| 17 | 16 | ralbidva 3186 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵) → (∀𝑦 ∈ 𝐼 (𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼 ↔ ∀𝑦 ∈ 𝐼 (𝑦 · 𝑥) ∈ 𝐼)) |
| 18 | 17 | ralbidva 3186 | . . 3 ⊢ (𝑅 ∈ Ring → (∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼 ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑦 · 𝑥) ∈ 𝐼)) |
| 19 | 12, 18 | anbi12d 643 | . 2 ⊢ (𝑅 ∈ Ring → ((𝐼 ∈ (SubGrp‘(oppr‘𝑅)) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑥(.r‘(oppr‘𝑅))𝑦) ∈ 𝐼) ↔ (𝐼 ∈ (SubGrp‘𝑅) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑦 · 𝑥) ∈ 𝐼))) |
| 20 | 8, 19 | bitrd 282 | 1 ⊢ (𝑅 ∈ Ring → (𝐼 ∈ 𝑈 ↔ (𝐼 ∈ (SubGrp‘𝑅) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐼 (𝑦 · 𝑥) ∈ 𝐼))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1563 ∈ wcel 2145 ∀wral 3079 ‘cfv 6525 (class class class)co 7400 Basecbs 17257 .rcmulr 17299 SubGrpcsubg 19174 Ringcrg 20303 opprcoppr 20406 LIdealclidl 21296 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5231 ax-sep 5250 ax-nul 5260 ax-pow 5326 ax-pr 5394 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-iun 4953 df-br 5105 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6291 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-tpos 8210 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-nn 12222 df-2 12291 df-3 12292 df-4 12293 df-5 12294 df-6 12295 df-7 12296 df-8 12297 df-sets 17212 df-slot 17230 df-ndx 17242 df-base 17258 df-ress 17279 df-plusg 17311 df-mulr 17312 df-sca 17314 df-vsca 17315 df-ip 17316 df-0g 17482 df-mgm 18686 df-sgrp 18765 df-mnd 18781 df-grp 18991 df-minusg 18992 df-sbg 18993 df-subg 19177 df-cmn 19840 df-abl 19841 df-mgp 20205 df-rng 20219 df-ur 20252 df-ring 20305 df-oppr 20407 df-subrg 20643 df-lmod 20949 df-lss 21019 df-sra 21260 df-rgmod 21261 df-lidl 21298 |
| This theorem is referenced by: (None) |
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