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Theorem rnglidlrng 14130
Description: A (left) ideal of a non-unital ring is a non-unital ring. (Contributed by AV, 17-Feb-2020.) Generalization for non-unital rings. The assumption 𝑈 ∈ (SubGrp‘𝑅) is required because a left ideal of a non-unital ring does not have to be a subgroup. (Revised by AV, 11-Mar-2025.)
Hypotheses
Ref Expression
rnglidlabl.l 𝐿 = (LIdeal‘𝑅)
rnglidlabl.i 𝐼 = (𝑅s 𝑈)
Assertion
Ref Expression
rnglidlrng ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Rng)

Proof of Theorem rnglidlrng
Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rngabl 13567 . . . 4 (𝑅 ∈ Rng → 𝑅 ∈ Abel)
213ad2ant1 1020 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Abel)
3 simp3 1001 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑈 ∈ (SubGrp‘𝑅))
4 rnglidlabl.i . . . 4 𝐼 = (𝑅s 𝑈)
54subgabl 13538 . . 3 ((𝑅 ∈ Abel ∧ 𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Abel)
62, 3, 5syl2anc 411 . 2 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Abel)
7 eqid 2196 . . . 4 (0g𝑅) = (0g𝑅)
87subg0cl 13388 . . 3 (𝑈 ∈ (SubGrp‘𝑅) → (0g𝑅) ∈ 𝑈)
9 rnglidlabl.l . . . 4 𝐿 = (LIdeal‘𝑅)
109, 4, 7rnglidlmsgrp 14129 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿 ∧ (0g𝑅) ∈ 𝑈) → (mulGrp‘𝐼) ∈ Smgrp)
118, 10syl3an3 1284 . 2 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (mulGrp‘𝐼) ∈ Smgrp)
12 simpl1 1002 . . . . 5 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → 𝑅 ∈ Rng)
139, 4lidlssbas 14109 . . . . . . . . 9 (𝑈𝐿 → (Base‘𝐼) ⊆ (Base‘𝑅))
1413sseld 3183 . . . . . . . 8 (𝑈𝐿 → (𝑎 ∈ (Base‘𝐼) → 𝑎 ∈ (Base‘𝑅)))
1513sseld 3183 . . . . . . . 8 (𝑈𝐿 → (𝑏 ∈ (Base‘𝐼) → 𝑏 ∈ (Base‘𝑅)))
1613sseld 3183 . . . . . . . 8 (𝑈𝐿 → (𝑐 ∈ (Base‘𝐼) → 𝑐 ∈ (Base‘𝑅)))
1714, 15, 163anim123d 1330 . . . . . . 7 (𝑈𝐿 → ((𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼)) → (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅))))
18173ad2ant2 1021 . . . . . 6 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼)) → (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅))))
1918imp 124 . . . . 5 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅)))
20 eqid 2196 . . . . . 6 (Base‘𝑅) = (Base‘𝑅)
21 eqid 2196 . . . . . 6 (+g𝑅) = (+g𝑅)
22 eqid 2196 . . . . . 6 (.r𝑅) = (.r𝑅)
2320, 21, 22rngdi 13572 . . . . 5 ((𝑅 ∈ Rng ∧ (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅))) → (𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)))
2412, 19, 23syl2anc 411 . . . 4 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → (𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)))
2520, 21, 22rngdir 13573 . . . . 5 ((𝑅 ∈ Rng ∧ (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅))) → ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))
2612, 19, 25syl2anc 411 . . . 4 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))
27 simp2 1000 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑈𝐿)
28 simp1 999 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Rng)
294, 22ressmulrg 12847 . . . . . . . . . 10 ((𝑈𝐿𝑅 ∈ Rng) → (.r𝑅) = (.r𝐼))
3027, 28, 29syl2anc 411 . . . . . . . . 9 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (.r𝑅) = (.r𝐼))
3130eqcomd 2202 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (.r𝐼) = (.r𝑅))
32 eqidd 2197 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑎 = 𝑎)
334a1i 9 . . . . . . . . . . 11 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 = (𝑅s 𝑈))
34 eqidd 2197 . . . . . . . . . . 11 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝑅) = (+g𝑅))
3533, 34, 27, 28ressplusgd 12831 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝑅) = (+g𝐼))
3635eqcomd 2202 . . . . . . . . 9 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝐼) = (+g𝑅))
3736oveqd 5942 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑏(+g𝐼)𝑐) = (𝑏(+g𝑅)𝑐))
3831, 32, 37oveq123d 5946 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = (𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)))
3931oveqd 5942 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)𝑏) = (𝑎(.r𝑅)𝑏))
4031oveqd 5942 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)𝑐) = (𝑎(.r𝑅)𝑐))
4136, 39, 40oveq123d 5946 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)))
4238, 41eqeq12d 2211 . . . . . 6 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ↔ (𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐))))
4336oveqd 5942 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(+g𝐼)𝑏) = (𝑎(+g𝑅)𝑏))
44 eqidd 2197 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑐 = 𝑐)
4531, 43, 44oveq123d 5946 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐))
4631oveqd 5942 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑏(.r𝐼)𝑐) = (𝑏(.r𝑅)𝑐))
4736, 40, 46oveq123d 5946 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐)) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))
4845, 47eqeq12d 2211 . . . . . 6 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐)) ↔ ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐))))
4942, 48anbi12d 473 . . . . 5 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ∧ ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐))) ↔ ((𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)) ∧ ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))))
5049adantr 276 . . . 4 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → (((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ∧ ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐))) ↔ ((𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)) ∧ ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))))
5124, 26, 50mpbir2and 946 . . 3 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → ((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ∧ ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐))))
5251ralrimivvva 2580 . 2 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ∀𝑎 ∈ (Base‘𝐼)∀𝑏 ∈ (Base‘𝐼)∀𝑐 ∈ (Base‘𝐼)((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ∧ ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐))))
53 eqid 2196 . . 3 (Base‘𝐼) = (Base‘𝐼)
54 eqid 2196 . . 3 (mulGrp‘𝐼) = (mulGrp‘𝐼)
55 eqid 2196 . . 3 (+g𝐼) = (+g𝐼)
56 eqid 2196 . . 3 (.r𝐼) = (.r𝐼)
5753, 54, 55, 56isrng 13566 . 2 (𝐼 ∈ Rng ↔ (𝐼 ∈ Abel ∧ (mulGrp‘𝐼) ∈ Smgrp ∧ ∀𝑎 ∈ (Base‘𝐼)∀𝑏 ∈ (Base‘𝐼)∀𝑐 ∈ (Base‘𝐼)((𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) ∧ ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐)))))
586, 11, 52, 57syl3anbrc 1183 1 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Rng)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105  w3a 980   = wceq 1364  wcel 2167  wral 2475  cfv 5259  (class class class)co 5925  Basecbs 12703  s cress 12704  +gcplusg 12780  .rcmulr 12781  0gc0g 12958  Smgrpcsgrp 13103  SubGrpcsubg 13373  Abelcabl 13491  mulGrpcmgp 13552  Rngcrng 13564  LIdealclidl 14099
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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4149  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-cnex 7987  ax-resscn 7988  ax-1cn 7989  ax-1re 7990  ax-icn 7991  ax-addcl 7992  ax-addrcl 7993  ax-mulcl 7994  ax-addcom 7996  ax-addass 7998  ax-i2m1 8001  ax-0lt1 8002  ax-0id 8004  ax-rnegex 8005  ax-pre-ltirr 8008  ax-pre-lttrn 8010  ax-pre-ltadd 8012
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rmo 2483  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-iun 3919  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-f 5263  df-f1 5264  df-fo 5265  df-f1o 5266  df-fv 5267  df-riota 5880  df-ov 5928  df-oprab 5929  df-mpo 5930  df-pnf 8080  df-mnf 8081  df-ltxr 8083  df-inn 9008  df-2 9066  df-3 9067  df-4 9068  df-5 9069  df-6 9070  df-7 9071  df-8 9072  df-ndx 12706  df-slot 12707  df-base 12709  df-sets 12710  df-iress 12711  df-plusg 12793  df-mulr 12794  df-sca 12796  df-vsca 12797  df-ip 12798  df-0g 12960  df-mgm 13058  df-sgrp 13104  df-mnd 13119  df-grp 13205  df-subg 13376  df-cmn 13492  df-abl 13493  df-mgp 13553  df-rng 13565  df-lssm 13985  df-sra 14067  df-rgmod 14068  df-lidl 14101
This theorem is referenced by:  rng2idlsubgsubrng  14152
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