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Mirrors > Home > ILE Home > Th. List > rng2idlsubgsubrng | GIF version |
Description: A two-sided ideal of a non-unital ring which is a subgroup of the ring is a subring of the ring. (Contributed by AV, 11-Mar-2025.) |
Ref | Expression |
---|---|
rng2idlsubgsubrng.r | ⊢ (𝜑 → 𝑅 ∈ Rng) |
rng2idlsubgsubrng.i | ⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅)) |
rng2idlsubgsubrng.u | ⊢ (𝜑 → 𝐼 ∈ (SubGrp‘𝑅)) |
Ref | Expression |
---|---|
rng2idlsubgsubrng | ⊢ (𝜑 → 𝐼 ∈ (SubRng‘𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rng2idlsubgsubrng.r | . 2 ⊢ (𝜑 → 𝑅 ∈ Rng) | |
2 | rng2idlsubgsubrng.i | . 2 ⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅)) | |
3 | eqid 2189 | . . . . . 6 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅) | |
4 | eqid 2189 | . . . . . 6 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
5 | eqid 2189 | . . . . . 6 ⊢ (LIdeal‘(oppr‘𝑅)) = (LIdeal‘(oppr‘𝑅)) | |
6 | eqid 2189 | . . . . . 6 ⊢ (2Ideal‘𝑅) = (2Ideal‘𝑅) | |
7 | 3, 4, 5, 6 | 2idlelb 13845 | . . . . 5 ⊢ (𝐼 ∈ (2Ideal‘𝑅) ↔ (𝐼 ∈ (LIdeal‘𝑅) ∧ 𝐼 ∈ (LIdeal‘(oppr‘𝑅)))) |
8 | 7 | simplbi 274 | . . . 4 ⊢ (𝐼 ∈ (2Ideal‘𝑅) → 𝐼 ∈ (LIdeal‘𝑅)) |
9 | 2, 8 | syl 14 | . . 3 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑅)) |
10 | rng2idlsubgsubrng.u | . . 3 ⊢ (𝜑 → 𝐼 ∈ (SubGrp‘𝑅)) | |
11 | eqid 2189 | . . . 4 ⊢ (𝑅 ↾s 𝐼) = (𝑅 ↾s 𝐼) | |
12 | 3, 11 | rnglidlrng 13839 | . . 3 ⊢ ((𝑅 ∈ Rng ∧ 𝐼 ∈ (LIdeal‘𝑅) ∧ 𝐼 ∈ (SubGrp‘𝑅)) → (𝑅 ↾s 𝐼) ∈ Rng) |
13 | 1, 9, 10, 12 | syl3anc 1249 | . 2 ⊢ (𝜑 → (𝑅 ↾s 𝐼) ∈ Rng) |
14 | 1, 2, 13 | rng2idlsubrng 13857 | 1 ⊢ (𝜑 → 𝐼 ∈ (SubRng‘𝑅)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 2160 ‘cfv 5238 (class class class)co 5900 ↾s cress 12524 SubGrpcsubg 13131 Rngcrng 13311 opprcoppr 13442 SubRngcsubrng 13569 LIdealclidl 13808 2Idealc2idl 13840 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-coll 4136 ax-sep 4139 ax-pow 4195 ax-pr 4230 ax-un 4454 ax-setind 4557 ax-cnex 7937 ax-resscn 7938 ax-1cn 7939 ax-1re 7940 ax-icn 7941 ax-addcl 7942 ax-addrcl 7943 ax-mulcl 7944 ax-addcom 7946 ax-addass 7948 ax-i2m1 7951 ax-0lt1 7952 ax-0id 7954 ax-rnegex 7955 ax-pre-ltirr 7958 ax-pre-lttrn 7960 ax-pre-ltadd 7962 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rmo 2476 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-pw 3595 df-sn 3616 df-pr 3617 df-op 3619 df-uni 3828 df-int 3863 df-iun 3906 df-br 4022 df-opab 4083 df-mpt 4084 df-id 4314 df-xp 4653 df-rel 4654 df-cnv 4655 df-co 4656 df-dm 4657 df-rn 4658 df-res 4659 df-ima 4660 df-iota 5199 df-fun 5240 df-fn 5241 df-f 5242 df-f1 5243 df-fo 5244 df-f1o 5245 df-fv 5246 df-riota 5855 df-ov 5903 df-oprab 5904 df-mpo 5905 df-pnf 8029 df-mnf 8030 df-ltxr 8032 df-inn 8955 df-2 9013 df-3 9014 df-4 9015 df-5 9016 df-6 9017 df-7 9018 df-8 9019 df-ndx 12526 df-slot 12527 df-base 12529 df-sets 12530 df-iress 12531 df-plusg 12613 df-mulr 12614 df-sca 12616 df-vsca 12617 df-ip 12618 df-0g 12774 df-mgm 12843 df-sgrp 12888 df-mnd 12901 df-grp 12971 df-subg 13134 df-cmn 13250 df-abl 13251 df-mgp 13300 df-rng 13312 df-subrng 13570 df-lssm 13694 df-sra 13776 df-rgmod 13777 df-lidl 13810 df-2idl 13841 |
This theorem is referenced by: rng2idlsubgnsg 13861 rng2idlsubg0 13862 |
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