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| Mirrors > Home > MPE Home > Th. List > subrgnrg | Structured version Visualization version GIF version | ||
| Description: A normed ring restricted to a subring is a normed ring. (Contributed by Mario Carneiro, 4-Oct-2015.) |
| Ref | Expression |
|---|---|
| subrgnrg.h | ⊢ 𝐻 = (𝐺 ↾s 𝐴) |
| Ref | Expression |
|---|---|
| subrgnrg | ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐻 ∈ NrmRing) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nrgngp 24578 | . . 3 ⊢ (𝐺 ∈ NrmRing → 𝐺 ∈ NrmGrp) | |
| 2 | subrgsubg 20494 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝐺) → 𝐴 ∈ (SubGrp‘𝐺)) | |
| 3 | subrgnrg.h | . . . 4 ⊢ 𝐻 = (𝐺 ↾s 𝐴) | |
| 4 | 3 | subgngp 24551 | . . 3 ⊢ ((𝐺 ∈ NrmGrp ∧ 𝐴 ∈ (SubGrp‘𝐺)) → 𝐻 ∈ NrmGrp) |
| 5 | 1, 2, 4 | syl2an 596 | . 2 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐻 ∈ NrmGrp) |
| 6 | 2 | adantl 481 | . . . 4 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐴 ∈ (SubGrp‘𝐺)) |
| 7 | eqid 2733 | . . . . 5 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 8 | eqid 2733 | . . . . 5 ⊢ (norm‘𝐻) = (norm‘𝐻) | |
| 9 | 3, 7, 8 | subgnm 24549 | . . . 4 ⊢ (𝐴 ∈ (SubGrp‘𝐺) → (norm‘𝐻) = ((norm‘𝐺) ↾ 𝐴)) |
| 10 | 6, 9 | syl 17 | . . 3 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → (norm‘𝐻) = ((norm‘𝐺) ↾ 𝐴)) |
| 11 | eqid 2733 | . . . . 5 ⊢ (AbsVal‘𝐺) = (AbsVal‘𝐺) | |
| 12 | 7, 11 | nrgabv 24577 | . . . 4 ⊢ (𝐺 ∈ NrmRing → (norm‘𝐺) ∈ (AbsVal‘𝐺)) |
| 13 | eqid 2733 | . . . . 5 ⊢ (AbsVal‘𝐻) = (AbsVal‘𝐻) | |
| 14 | 11, 3, 13 | abvres 20748 | . . . 4 ⊢ (((norm‘𝐺) ∈ (AbsVal‘𝐺) ∧ 𝐴 ∈ (SubRing‘𝐺)) → ((norm‘𝐺) ↾ 𝐴) ∈ (AbsVal‘𝐻)) |
| 15 | 12, 14 | sylan 580 | . . 3 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → ((norm‘𝐺) ↾ 𝐴) ∈ (AbsVal‘𝐻)) |
| 16 | 10, 15 | eqeltrd 2833 | . 2 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → (norm‘𝐻) ∈ (AbsVal‘𝐻)) |
| 17 | 8, 13 | isnrg 24576 | . 2 ⊢ (𝐻 ∈ NrmRing ↔ (𝐻 ∈ NrmGrp ∧ (norm‘𝐻) ∈ (AbsVal‘𝐻))) |
| 18 | 5, 16, 17 | sylanbrc 583 | 1 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐻 ∈ NrmRing) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ↾ cres 5621 ‘cfv 6486 (class class class)co 7352 ↾s cress 17143 SubGrpcsubg 19035 SubRingcsubrg 20486 AbsValcabv 20725 normcnm 24492 NrmGrpcngp 24493 NrmRingcnrg 24495 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11069 ax-resscn 11070 ax-1cn 11071 ax-icn 11072 ax-addcl 11073 ax-addrcl 11074 ax-mulcl 11075 ax-mulrcl 11076 ax-mulcom 11077 ax-addass 11078 ax-mulass 11079 ax-distr 11080 ax-i2m1 11081 ax-1ne0 11082 ax-1rid 11083 ax-rnegex 11084 ax-rrecex 11085 ax-cnre 11086 ax-pre-lttri 11087 ax-pre-lttrn 11088 ax-pre-ltadd 11089 ax-pre-mulgt0 11090 ax-pre-sup 11091 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7309 df-ov 7355 df-oprab 7356 df-mpo 7357 df-om 7803 df-1st 7927 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-er 8628 df-map 8758 df-en 8876 df-dom 8877 df-sdom 8878 df-sup 9333 df-inf 9334 df-pnf 11155 df-mnf 11156 df-xr 11157 df-ltxr 11158 df-le 11159 df-sub 11353 df-neg 11354 df-div 11782 df-nn 12133 df-2 12195 df-3 12196 df-4 12197 df-5 12198 df-6 12199 df-7 12200 df-8 12201 df-9 12202 df-n0 12389 df-z 12476 df-dec 12595 df-uz 12739 df-q 12849 df-rp 12893 df-xneg 13013 df-xadd 13014 df-xmul 13015 df-ico 13253 df-sets 17077 df-slot 17095 df-ndx 17107 df-base 17123 df-ress 17144 df-plusg 17176 df-mulr 17177 df-tset 17182 df-ds 17185 df-rest 17328 df-topn 17329 df-0g 17347 df-topgen 17349 df-mgm 18550 df-sgrp 18629 df-mnd 18645 df-grp 18851 df-minusg 18852 df-sbg 18853 df-subg 19038 df-cmn 19696 df-abl 19697 df-mgp 20061 df-rng 20073 df-ur 20102 df-ring 20155 df-subrng 20463 df-subrg 20487 df-abv 20726 df-psmet 21285 df-xmet 21286 df-met 21287 df-bl 21288 df-mopn 21289 df-top 22810 df-topon 22827 df-topsp 22849 df-bases 22862 df-xms 24236 df-ms 24237 df-nm 24498 df-ngp 24499 df-nrg 24501 |
| This theorem is referenced by: sranlm 24600 zringnrg 24704 isncvsngp 25077 tcphcph 25165 rezh 34003 rerrext 34043 |
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