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Mirrors > Home > MPE Home > Th. List > unitnmn0 | Structured version Visualization version GIF version |
Description: The norm of a unit is nonzero in a nonzero normed ring. (Contributed by Mario Carneiro, 5-Oct-2015.) |
Ref | Expression |
---|---|
nminvr.n | ⊢ 𝑁 = (norm‘𝑅) |
nminvr.u | ⊢ 𝑈 = (Unit‘𝑅) |
Ref | Expression |
---|---|
unitnmn0 | ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nrgngp 24103 | . . 3 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ NrmGrp) | |
2 | 1 | 3ad2ant1 1133 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝑅 ∈ NrmGrp) |
3 | eqid 2731 | . . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
4 | nminvr.u | . . . 4 ⊢ 𝑈 = (Unit‘𝑅) | |
5 | 3, 4 | unitcl 20138 | . . 3 ⊢ (𝐴 ∈ 𝑈 → 𝐴 ∈ (Base‘𝑅)) |
6 | 5 | 3ad2ant3 1135 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ∈ (Base‘𝑅)) |
7 | eqid 2731 | . . . 4 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
8 | 4, 7 | nzrunit 20248 | . . 3 ⊢ ((𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ≠ (0g‘𝑅)) |
9 | 8 | 3adant1 1130 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ≠ (0g‘𝑅)) |
10 | nminvr.n | . . 3 ⊢ 𝑁 = (norm‘𝑅) | |
11 | 3, 10, 7 | nmne0 24052 | . 2 ⊢ ((𝑅 ∈ NrmGrp ∧ 𝐴 ∈ (Base‘𝑅) ∧ 𝐴 ≠ (0g‘𝑅)) → (𝑁‘𝐴) ≠ 0) |
12 | 2, 6, 9, 11 | syl3anc 1371 | 1 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2939 ‘cfv 6529 0cc0 11089 Basecbs 17123 0gc0g 17364 Unitcui 20118 NzRingcnzr 20238 normcnm 24009 NrmGrpcngp 24010 NrmRingcnrg 24012 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2702 ax-rep 5275 ax-sep 5289 ax-nul 5296 ax-pow 5353 ax-pr 5417 ax-un 7705 ax-cnex 11145 ax-resscn 11146 ax-1cn 11147 ax-icn 11148 ax-addcl 11149 ax-addrcl 11150 ax-mulcl 11151 ax-mulrcl 11152 ax-mulcom 11153 ax-addass 11154 ax-mulass 11155 ax-distr 11156 ax-i2m1 11157 ax-1ne0 11158 ax-1rid 11159 ax-rnegex 11160 ax-rrecex 11161 ax-cnre 11162 ax-pre-lttri 11163 ax-pre-lttrn 11164 ax-pre-ltadd 11165 ax-pre-mulgt0 11166 ax-pre-sup 11167 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3430 df-v 3472 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4520 df-pw 4595 df-sn 4620 df-pr 4622 df-op 4626 df-uni 4899 df-iun 4989 df-br 5139 df-opab 5201 df-mpt 5222 df-tr 5256 df-id 5564 df-eprel 5570 df-po 5578 df-so 5579 df-fr 5621 df-we 5623 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6286 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 df-iota 6481 df-fun 6531 df-fn 6532 df-f 6533 df-f1 6534 df-fo 6535 df-f1o 6536 df-fv 6537 df-riota 7346 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7836 df-1st 7954 df-2nd 7955 df-tpos 8190 df-frecs 8245 df-wrecs 8276 df-recs 8350 df-rdg 8389 df-er 8683 df-map 8802 df-en 8920 df-dom 8921 df-sdom 8922 df-sup 9416 df-inf 9417 df-pnf 11229 df-mnf 11230 df-xr 11231 df-ltxr 11232 df-le 11233 df-sub 11425 df-neg 11426 df-div 11851 df-nn 12192 df-2 12254 df-3 12255 df-n0 12452 df-z 12538 df-uz 12802 df-q 12912 df-rp 12954 df-xneg 13071 df-xadd 13072 df-xmul 13073 df-sets 17076 df-slot 17094 df-ndx 17106 df-base 17124 df-ress 17153 df-plusg 17189 df-mulr 17190 df-0g 17366 df-topgen 17368 df-mgm 18540 df-sgrp 18589 df-mnd 18600 df-grp 18794 df-minusg 18795 df-mgp 19944 df-ur 19961 df-ring 20013 df-oppr 20099 df-dvdsr 20120 df-unit 20121 df-invr 20151 df-nzr 20239 df-psmet 20865 df-xmet 20866 df-bl 20868 df-mopn 20869 df-top 22320 df-topon 22337 df-topsp 22359 df-bases 22373 df-xms 23750 df-ms 23751 df-nm 24015 df-ngp 24016 df-nrg 24018 |
This theorem is referenced by: nminvr 24110 nmdvr 24111 |
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