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| Mirrors > Home > ILE Home > Th. List > subrngin | GIF version | ||
| Description: The intersection of two subrings is a subring. (Contributed by AV, 15-Feb-2025.) |
| Ref | Expression |
|---|---|
| subrngin | ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → (𝐴 ∩ 𝐵) ∈ (SubRng‘𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | intprg 3920 | . 2 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → ∩ {𝐴, 𝐵} = (𝐴 ∩ 𝐵)) | |
| 2 | prssi 3793 | . . 3 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → {𝐴, 𝐵} ⊆ (SubRng‘𝑅)) | |
| 3 | prmg 3756 | . . . 4 ⊢ (𝐴 ∈ (SubRng‘𝑅) → ∃𝑗 𝑗 ∈ {𝐴, 𝐵}) | |
| 4 | 3 | adantr 276 | . . 3 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → ∃𝑗 𝑗 ∈ {𝐴, 𝐵}) |
| 5 | subrngintm 14018 | . . 3 ⊢ (({𝐴, 𝐵} ⊆ (SubRng‘𝑅) ∧ ∃𝑗 𝑗 ∈ {𝐴, 𝐵}) → ∩ {𝐴, 𝐵} ∈ (SubRng‘𝑅)) | |
| 6 | 2, 4, 5 | syl2anc 411 | . 2 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → ∩ {𝐴, 𝐵} ∈ (SubRng‘𝑅)) |
| 7 | 1, 6 | eqeltrrd 2284 | 1 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → (𝐴 ∩ 𝐵) ∈ (SubRng‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∃wex 1516 ∈ wcel 2177 ∩ cin 3166 ⊆ wss 3167 {cpr 3635 ∩ cint 3887 ‘cfv 5276 SubRngcsubrng 14003 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4163 ax-sep 4166 ax-pow 4222 ax-pr 4257 ax-un 4484 ax-setind 4589 ax-cnex 8023 ax-resscn 8024 ax-1cn 8025 ax-1re 8026 ax-icn 8027 ax-addcl 8028 ax-addrcl 8029 ax-mulcl 8030 ax-addcom 8032 ax-addass 8034 ax-i2m1 8037 ax-0lt1 8038 ax-0id 8040 ax-rnegex 8041 ax-pre-ltirr 8044 ax-pre-lttrn 8046 ax-pre-ltadd 8048 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3000 df-csb 3095 df-dif 3169 df-un 3171 df-in 3173 df-ss 3180 df-nul 3462 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-int 3888 df-iun 3931 df-br 4048 df-opab 4110 df-mpt 4111 df-id 4344 df-xp 4685 df-rel 4686 df-cnv 4687 df-co 4688 df-dm 4689 df-rn 4690 df-res 4691 df-ima 4692 df-iota 5237 df-fun 5278 df-fn 5279 df-f 5280 df-f1 5281 df-fo 5282 df-f1o 5283 df-fv 5284 df-riota 5906 df-ov 5954 df-oprab 5955 df-mpo 5956 df-pnf 8116 df-mnf 8117 df-ltxr 8119 df-inn 9044 df-2 9102 df-3 9103 df-ndx 12879 df-slot 12880 df-base 12882 df-sets 12883 df-iress 12884 df-plusg 12966 df-mulr 12967 df-0g 13134 df-mgm 13232 df-sgrp 13278 df-mnd 13293 df-grp 13379 df-minusg 13380 df-subg 13550 df-cmn 13666 df-abl 13667 df-mgp 13727 df-rng 13739 df-subrng 14004 |
| This theorem is referenced by: (None) |
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