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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 24049 | . . 3 ⊢ (𝐺 ∈ NrmRing → 𝐺 ∈ NrmGrp) | |
2 | subrgsubg 20270 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝐺) → 𝐴 ∈ (SubGrp‘𝐺)) | |
3 | subrgnrg.h | . . . 4 ⊢ 𝐻 = (𝐺 ↾s 𝐴) | |
4 | 3 | subgngp 24014 | . . 3 ⊢ ((𝐺 ∈ NrmGrp ∧ 𝐴 ∈ (SubGrp‘𝐺)) → 𝐻 ∈ NrmGrp) |
5 | 1, 2, 4 | syl2an 597 | . 2 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐻 ∈ NrmGrp) |
6 | 2 | adantl 483 | . . . 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 24012 | . . . 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 24048 | . . . 4 ⊢ (𝐺 ∈ NrmRing → (norm‘𝐺) ∈ (AbsVal‘𝐺)) |
13 | eqid 2733 | . . . . 5 ⊢ (AbsVal‘𝐻) = (AbsVal‘𝐻) | |
14 | 11, 3, 13 | abvres 20341 | . . . 4 ⊢ (((norm‘𝐺) ∈ (AbsVal‘𝐺) ∧ 𝐴 ∈ (SubRing‘𝐺)) → ((norm‘𝐺) ↾ 𝐴) ∈ (AbsVal‘𝐻)) |
15 | 12, 14 | sylan 581 | . . 3 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → ((norm‘𝐺) ↾ 𝐴) ∈ (AbsVal‘𝐻)) |
16 | 10, 15 | eqeltrd 2834 | . 2 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → (norm‘𝐻) ∈ (AbsVal‘𝐻)) |
17 | 8, 13 | isnrg 24047 | . 2 ⊢ (𝐻 ∈ NrmRing ↔ (𝐻 ∈ NrmGrp ∧ (norm‘𝐻) ∈ (AbsVal‘𝐻))) |
18 | 5, 16, 17 | sylanbrc 584 | 1 ⊢ ((𝐺 ∈ NrmRing ∧ 𝐴 ∈ (SubRing‘𝐺)) → 𝐻 ∈ NrmRing) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ↾ cres 5639 ‘cfv 6500 (class class class)co 7361 ↾s cress 17120 SubGrpcsubg 18930 SubRingcsubrg 20260 AbsValcabv 20318 normcnm 23955 NrmGrpcngp 23956 NrmRingcnrg 23958 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5246 ax-sep 5260 ax-nul 5267 ax-pow 5324 ax-pr 5388 ax-un 7676 ax-cnex 11115 ax-resscn 11116 ax-1cn 11117 ax-icn 11118 ax-addcl 11119 ax-addrcl 11120 ax-mulcl 11121 ax-mulrcl 11122 ax-mulcom 11123 ax-addass 11124 ax-mulass 11125 ax-distr 11126 ax-i2m1 11127 ax-1ne0 11128 ax-1rid 11129 ax-rnegex 11130 ax-rrecex 11131 ax-cnre 11132 ax-pre-lttri 11133 ax-pre-lttrn 11134 ax-pre-ltadd 11135 ax-pre-mulgt0 11136 ax-pre-sup 11137 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3352 df-reu 3353 df-rab 3407 df-v 3449 df-sbc 3744 df-csb 3860 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3933 df-nul 4287 df-if 4491 df-pw 4566 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4870 df-iun 4960 df-br 5110 df-opab 5172 df-mpt 5193 df-tr 5227 df-id 5535 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5592 df-we 5594 df-xp 5643 df-rel 5644 df-cnv 5645 df-co 5646 df-dm 5647 df-rn 5648 df-res 5649 df-ima 5650 df-pred 6257 df-ord 6324 df-on 6325 df-lim 6326 df-suc 6327 df-iota 6452 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7317 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7807 df-1st 7925 df-2nd 7926 df-frecs 8216 df-wrecs 8247 df-recs 8321 df-rdg 8360 df-er 8654 df-map 8773 df-en 8890 df-dom 8891 df-sdom 8892 df-sup 9386 df-inf 9387 df-pnf 11199 df-mnf 11200 df-xr 11201 df-ltxr 11202 df-le 11203 df-sub 11395 df-neg 11396 df-div 11821 df-nn 12162 df-2 12224 df-3 12225 df-4 12226 df-5 12227 df-6 12228 df-7 12229 df-8 12230 df-9 12231 df-n0 12422 df-z 12508 df-dec 12627 df-uz 12772 df-q 12882 df-rp 12924 df-xneg 13041 df-xadd 13042 df-xmul 13043 df-ico 13279 df-sets 17044 df-slot 17062 df-ndx 17074 df-base 17092 df-ress 17121 df-plusg 17154 df-mulr 17155 df-tset 17160 df-ds 17163 df-rest 17312 df-topn 17313 df-0g 17331 df-topgen 17333 df-mgm 18505 df-sgrp 18554 df-mnd 18565 df-grp 18759 df-minusg 18760 df-sbg 18761 df-subg 18933 df-mgp 19905 df-ring 19974 df-subrg 20262 df-abv 20319 df-psmet 20811 df-xmet 20812 df-met 20813 df-bl 20814 df-mopn 20815 df-top 22266 df-topon 22283 df-topsp 22305 df-bases 22319 df-xms 23696 df-ms 23697 df-nm 23961 df-ngp 23962 df-nrg 23964 |
This theorem is referenced by: sranlm 24071 zringnrg 24174 isncvsngp 24536 tcphcph 24624 rezh 32616 rerrext 32654 |
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