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Mirrors > Home > MPE Home > Th. List > subrngint | Structured version Visualization version GIF version |
Description: The intersection of a nonempty collection of subrings is a subring. (Contributed by AV, 15-Feb-2025.) |
Ref | Expression |
---|---|
subrngint | ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → ∩ 𝑆 ∈ (SubRng‘𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subrngsubg 20493 | . . . . 5 ⊢ (𝑟 ∈ (SubRng‘𝑅) → 𝑟 ∈ (SubGrp‘𝑅)) | |
2 | 1 | ssriv 3976 | . . . 4 ⊢ (SubRng‘𝑅) ⊆ (SubGrp‘𝑅) |
3 | sstr 3981 | . . . 4 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ (SubRng‘𝑅) ⊆ (SubGrp‘𝑅)) → 𝑆 ⊆ (SubGrp‘𝑅)) | |
4 | 2, 3 | mpan2 689 | . . 3 ⊢ (𝑆 ⊆ (SubRng‘𝑅) → 𝑆 ⊆ (SubGrp‘𝑅)) |
5 | subgint 19109 | . . 3 ⊢ ((𝑆 ⊆ (SubGrp‘𝑅) ∧ 𝑆 ≠ ∅) → ∩ 𝑆 ∈ (SubGrp‘𝑅)) | |
6 | 4, 5 | sylan 578 | . 2 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → ∩ 𝑆 ∈ (SubGrp‘𝑅)) |
7 | ssel2 3967 | . . . . . . 7 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑟 ∈ 𝑆) → 𝑟 ∈ (SubRng‘𝑅)) | |
8 | 7 | ad4ant14 750 | . . . . . 6 ⊢ ((((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) ∧ 𝑟 ∈ 𝑆) → 𝑟 ∈ (SubRng‘𝑅)) |
9 | simprl 769 | . . . . . . 7 ⊢ (((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) → 𝑥 ∈ ∩ 𝑆) | |
10 | elinti 4953 | . . . . . . . 8 ⊢ (𝑥 ∈ ∩ 𝑆 → (𝑟 ∈ 𝑆 → 𝑥 ∈ 𝑟)) | |
11 | 10 | imp 405 | . . . . . . 7 ⊢ ((𝑥 ∈ ∩ 𝑆 ∧ 𝑟 ∈ 𝑆) → 𝑥 ∈ 𝑟) |
12 | 9, 11 | sylan 578 | . . . . . 6 ⊢ ((((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) ∧ 𝑟 ∈ 𝑆) → 𝑥 ∈ 𝑟) |
13 | simprr 771 | . . . . . . 7 ⊢ (((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) → 𝑦 ∈ ∩ 𝑆) | |
14 | elinti 4953 | . . . . . . . 8 ⊢ (𝑦 ∈ ∩ 𝑆 → (𝑟 ∈ 𝑆 → 𝑦 ∈ 𝑟)) | |
15 | 14 | imp 405 | . . . . . . 7 ⊢ ((𝑦 ∈ ∩ 𝑆 ∧ 𝑟 ∈ 𝑆) → 𝑦 ∈ 𝑟) |
16 | 13, 15 | sylan 578 | . . . . . 6 ⊢ ((((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) ∧ 𝑟 ∈ 𝑆) → 𝑦 ∈ 𝑟) |
17 | eqid 2725 | . . . . . . 7 ⊢ (.r‘𝑅) = (.r‘𝑅) | |
18 | 17 | subrngmcl 20498 | . . . . . 6 ⊢ ((𝑟 ∈ (SubRng‘𝑅) ∧ 𝑥 ∈ 𝑟 ∧ 𝑦 ∈ 𝑟) → (𝑥(.r‘𝑅)𝑦) ∈ 𝑟) |
19 | 8, 12, 16, 18 | syl3anc 1368 | . . . . 5 ⊢ ((((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) ∧ 𝑟 ∈ 𝑆) → (𝑥(.r‘𝑅)𝑦) ∈ 𝑟) |
20 | 19 | ralrimiva 3136 | . . . 4 ⊢ (((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) → ∀𝑟 ∈ 𝑆 (𝑥(.r‘𝑅)𝑦) ∈ 𝑟) |
21 | ovex 7449 | . . . . 5 ⊢ (𝑥(.r‘𝑅)𝑦) ∈ V | |
22 | 21 | elint2 4951 | . . . 4 ⊢ ((𝑥(.r‘𝑅)𝑦) ∈ ∩ 𝑆 ↔ ∀𝑟 ∈ 𝑆 (𝑥(.r‘𝑅)𝑦) ∈ 𝑟) |
23 | 20, 22 | sylibr 233 | . . 3 ⊢ (((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) ∧ (𝑥 ∈ ∩ 𝑆 ∧ 𝑦 ∈ ∩ 𝑆)) → (𝑥(.r‘𝑅)𝑦) ∈ ∩ 𝑆) |
24 | 23 | ralrimivva 3191 | . 2 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → ∀𝑥 ∈ ∩ 𝑆∀𝑦 ∈ ∩ 𝑆(𝑥(.r‘𝑅)𝑦) ∈ ∩ 𝑆) |
25 | ssn0 4396 | . . 3 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → (SubRng‘𝑅) ≠ ∅) | |
26 | n0 4342 | . . . 4 ⊢ ((SubRng‘𝑅) ≠ ∅ ↔ ∃𝑟 𝑟 ∈ (SubRng‘𝑅)) | |
27 | subrngrcl 20492 | . . . . 5 ⊢ (𝑟 ∈ (SubRng‘𝑅) → 𝑅 ∈ Rng) | |
28 | 27 | exlimiv 1925 | . . . 4 ⊢ (∃𝑟 𝑟 ∈ (SubRng‘𝑅) → 𝑅 ∈ Rng) |
29 | 26, 28 | sylbi 216 | . . 3 ⊢ ((SubRng‘𝑅) ≠ ∅ → 𝑅 ∈ Rng) |
30 | eqid 2725 | . . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
31 | 30, 17 | issubrng2 20499 | . . 3 ⊢ (𝑅 ∈ Rng → (∩ 𝑆 ∈ (SubRng‘𝑅) ↔ (∩ 𝑆 ∈ (SubGrp‘𝑅) ∧ ∀𝑥 ∈ ∩ 𝑆∀𝑦 ∈ ∩ 𝑆(𝑥(.r‘𝑅)𝑦) ∈ ∩ 𝑆))) |
32 | 25, 29, 31 | 3syl 18 | . 2 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → (∩ 𝑆 ∈ (SubRng‘𝑅) ↔ (∩ 𝑆 ∈ (SubGrp‘𝑅) ∧ ∀𝑥 ∈ ∩ 𝑆∀𝑦 ∈ ∩ 𝑆(𝑥(.r‘𝑅)𝑦) ∈ ∩ 𝑆))) |
33 | 6, 24, 32 | mpbir2and 711 | 1 ⊢ ((𝑆 ⊆ (SubRng‘𝑅) ∧ 𝑆 ≠ ∅) → ∩ 𝑆 ∈ (SubRng‘𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∃wex 1773 ∈ wcel 2098 ≠ wne 2930 ∀wral 3051 ⊆ wss 3939 ∅c0 4318 ∩ cint 4944 ‘cfv 6543 (class class class)co 7416 Basecbs 17179 .rcmulr 17233 SubGrpcsubg 19079 Rngcrng 20096 SubRngcsubrng 20486 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-pss 3959 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7372 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-2nd 7992 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-nn 12243 df-2 12305 df-3 12306 df-sets 17132 df-slot 17150 df-ndx 17162 df-base 17180 df-ress 17209 df-plusg 17245 df-mulr 17246 df-0g 17422 df-mgm 18599 df-sgrp 18678 df-mnd 18694 df-grp 18897 df-minusg 18898 df-subg 19082 df-cmn 19741 df-abl 19742 df-mgp 20079 df-rng 20097 df-subrng 20487 |
This theorem is referenced by: subrngin 20502 subrngmre 20503 |
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