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Theorem rnglidlrng 14818
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 14217 . . . 4 (𝑅 ∈ Rng → 𝑅 ∈ Abel)
213ad2ant1 1049 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Abel)
3 simp3 1030 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑈 ∈ (SubGrp‘𝑅))
4 rnglidlabl.i . . . 4 𝐼 = (𝑅s 𝑈)
54subgabl 14119 . . 3 ((𝑅 ∈ Abel ∧ 𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Abel)
62, 3, 5syl2anc 415 . 2 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Abel)
7 eqid 2238 . . . 4 (0g𝑅) = (0g𝑅)
87subg0cl 13968 . . 3 (𝑈 ∈ (SubGrp‘𝑅) → (0g𝑅) ∈ 𝑈)
9 rnglidlabl.l . . . 4 𝐿 = (LIdeal‘𝑅)
109, 4, 7rnglidlmsgrp 14817 . . 3 ((𝑅 ∈ Rng ∧ 𝑈𝐿 ∧ (0g𝑅) ∈ 𝑈) → (mulGrp‘𝐼) ∈ Smgrp)
118, 10syl3an3 1313 . 2 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (mulGrp‘𝐼) ∈ Smgrp)
12 simpl1 1031 . . . . 5 (((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) ∧ (𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼))) → 𝑅 ∈ Rng)
139, 4lidlssbas 14797 . . . . . . . . 9 (𝑈𝐿 → (Base‘𝐼) ⊆ (Base‘𝑅))
1413sseld 3247 . . . . . . . 8 (𝑈𝐿 → (𝑎 ∈ (Base‘𝐼) → 𝑎 ∈ (Base‘𝑅)))
1513sseld 3247 . . . . . . . 8 (𝑈𝐿 → (𝑏 ∈ (Base‘𝐼) → 𝑏 ∈ (Base‘𝑅)))
1613sseld 3247 . . . . . . . 8 (𝑈𝐿 → (𝑐 ∈ (Base‘𝐼) → 𝑐 ∈ (Base‘𝑅)))
1714, 15, 163anim123d 1360 . . . . . . 7 (𝑈𝐿 → ((𝑎 ∈ (Base‘𝐼) ∧ 𝑏 ∈ (Base‘𝐼) ∧ 𝑐 ∈ (Base‘𝐼)) → (𝑎 ∈ (Base‘𝑅) ∧ 𝑏 ∈ (Base‘𝑅) ∧ 𝑐 ∈ (Base‘𝑅))))
18173ad2ant2 1050 . . . . . 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 2238 . . . . . 6 (Base‘𝑅) = (Base‘𝑅)
21 eqid 2238 . . . . . 6 (+g𝑅) = (+g𝑅)
22 eqid 2238 . . . . . 6 (.r𝑅) = (.r𝑅)
2320, 21, 22rngdi 14222 . . . . 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 415 . . . 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 14223 . . . . 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 415 . . . 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 1029 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑈𝐿)
28 simp1 1028 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Rng)
294, 22ressmulrg 13482 . . . . . . . . . 10 ((𝑈𝐿𝑅 ∈ Rng) → (.r𝑅) = (.r𝐼))
3027, 28, 29syl2anc 415 . . . . . . . . 9 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (.r𝑅) = (.r𝐼))
3130eqcomd 2244 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (.r𝐼) = (.r𝑅))
32 eqidd 2239 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑎 = 𝑎)
334a1i 9 . . . . . . . . . . 11 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 = (𝑅s 𝑈))
34 eqidd 2239 . . . . . . . . . . 11 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝑅) = (+g𝑅))
3533, 34, 27, 28ressplusgd 13466 . . . . . . . . . 10 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝑅) = (+g𝐼))
3635eqcomd 2244 . . . . . . . . 9 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (+g𝐼) = (+g𝑅))
3736oveqd 6096 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑏(+g𝐼)𝑐) = (𝑏(+g𝑅)𝑐))
3831, 32, 37oveq123d 6100 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)(𝑏(+g𝐼)𝑐)) = (𝑎(.r𝑅)(𝑏(+g𝑅)𝑐)))
3931oveqd 6096 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)𝑏) = (𝑎(.r𝑅)𝑏))
4031oveqd 6096 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(.r𝐼)𝑐) = (𝑎(.r𝑅)𝑐))
4136, 39, 40oveq123d 6100 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(.r𝐼)𝑏)(+g𝐼)(𝑎(.r𝐼)𝑐)) = ((𝑎(.r𝑅)𝑏)(+g𝑅)(𝑎(.r𝑅)𝑐)))
4238, 41eqeq12d 2253 . . . . . 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 6096 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑎(+g𝐼)𝑏) = (𝑎(+g𝑅)𝑏))
44 eqidd 2239 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝑐 = 𝑐)
4531, 43, 44oveq123d 6100 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(+g𝐼)𝑏)(.r𝐼)𝑐) = ((𝑎(+g𝑅)𝑏)(.r𝑅)𝑐))
4631oveqd 6096 . . . . . . . 8 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → (𝑏(.r𝐼)𝑐) = (𝑏(.r𝑅)𝑐))
4736, 40, 46oveq123d 6100 . . . . . . 7 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → ((𝑎(.r𝐼)𝑐)(+g𝐼)(𝑏(.r𝐼)𝑐)) = ((𝑎(.r𝑅)𝑐)(+g𝑅)(𝑏(.r𝑅)𝑐)))
4845, 47eqeq12d 2253 . . . . . 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 477 . . . . 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 957 . . 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 2633 . 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 2238 . . 3 (Base‘𝐼) = (Base‘𝐼)
54 eqid 2238 . . 3 (mulGrp‘𝐼) = (mulGrp‘𝐼)
55 eqid 2238 . . 3 (+g𝐼) = (+g𝐼)
56 eqid 2238 . . 3 (.r𝐼) = (.r𝐼)
5753, 54, 55, 56isrng 14216 . 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 1212 1 ((𝑅 ∈ Rng ∧ 𝑈𝐿𝑈 ∈ (SubGrp‘𝑅)) → 𝐼 ∈ Rng)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105  w3a 1009   = wceq 1402  wcel 2209  wral 2528  cfv 5375  (class class class)co 6079  Basecbs 13335  s cress 13336  +gcplusg 13414  .rcmulr 13415  0gc0g 13593  Smgrpcsgrp 13699  SubGrpcsubg 13953  Abelcabl 14071  mulGrpcmgp 14200  Rngcrng 14214  LIdealclidl 14787
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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4244  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8264  ax-resscn 8265  ax-1cn 8266  ax-1re 8267  ax-icn 8268  ax-addcl 8269  ax-addrcl 8270  ax-mulcl 8271  ax-addcom 8273  ax-addass 8275  ax-i2m1 8278  ax-0lt1 8279  ax-0id 8281  ax-rnegex 8282  ax-pre-ltirr 8285  ax-pre-lttrn 8287  ax-pre-ltadd 8289
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-iun 4012  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-riota 6032  df-ov 6082  df-oprab 6083  df-mpo 6084  df-pnf 8356  df-mnf 8357  df-ltxr 8359  df-inn 9288  df-2 9346  df-3 9347  df-4 9348  df-5 9349  df-6 9350  df-7 9351  df-8 9352  df-ndx 13338  df-slot 13339  df-base 13341  df-sets 13342  df-iress 13343  df-plusg 13427  df-mulr 13428  df-sca 13430  df-vsca 13431  df-ip 13432  df-0g 13595  df-mgm 13659  df-sgrp 13700  df-mnd 13713  df-grp 13791  df-subg 13956  df-cmn 14072  df-abl 14073  df-mgp 14201  df-rng 14215  df-lssm 14673  df-sra 14755  df-rgmod 14756  df-lidl 14789
This theorem is referenced by:  rng2idlsubgsubrng  14840
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