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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 3960 | . 2 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → ∩ {𝐴, 𝐵} = (𝐴 ∩ 𝐵)) | |
| 2 | prssi 3830 | . . 3 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → {𝐴, 𝐵} ⊆ (SubRng‘𝑅)) | |
| 3 | prmg 3793 | . . . 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 14247 | . . 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 2308 | 1 ⊢ ((𝐴 ∈ (SubRng‘𝑅) ∧ 𝐵 ∈ (SubRng‘𝑅)) → (𝐴 ∩ 𝐵) ∈ (SubRng‘𝑅)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∃wex 1540 ∈ wcel 2201 ∩ cin 3198 ⊆ wss 3199 {cpr 3669 ∩ cint 3927 ‘cfv 5325 SubRngcsubrng 14232 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-coll 4203 ax-sep 4206 ax-pow 4263 ax-pr 4298 ax-un 4529 ax-setind 4634 ax-cnex 8125 ax-resscn 8126 ax-1cn 8127 ax-1re 8128 ax-icn 8129 ax-addcl 8130 ax-addrcl 8131 ax-mulcl 8132 ax-addcom 8134 ax-addass 8136 ax-i2m1 8139 ax-0lt1 8140 ax-0id 8142 ax-rnegex 8143 ax-pre-ltirr 8146 ax-pre-lttrn 8148 ax-pre-ltadd 8150 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-nel 2497 df-ral 2514 df-rex 2515 df-reu 2516 df-rmo 2517 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-nul 3494 df-pw 3653 df-sn 3674 df-pr 3675 df-op 3677 df-uni 3893 df-int 3928 df-iun 3971 df-br 4088 df-opab 4150 df-mpt 4151 df-id 4389 df-xp 4730 df-rel 4731 df-cnv 4732 df-co 4733 df-dm 4734 df-rn 4735 df-res 4736 df-ima 4737 df-iota 5285 df-fun 5327 df-fn 5328 df-f 5329 df-f1 5330 df-fo 5331 df-f1o 5332 df-fv 5333 df-riota 5973 df-ov 6023 df-oprab 6024 df-mpo 6025 df-pnf 8218 df-mnf 8219 df-ltxr 8221 df-inn 9146 df-2 9204 df-3 9205 df-ndx 13105 df-slot 13106 df-base 13108 df-sets 13109 df-iress 13110 df-plusg 13193 df-mulr 13194 df-0g 13361 df-mgm 13459 df-sgrp 13505 df-mnd 13520 df-grp 13606 df-minusg 13607 df-subg 13777 df-cmn 13893 df-abl 13894 df-mgp 13955 df-rng 13967 df-subrng 14233 |
| This theorem is referenced by: (None) |
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