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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 23263 | . . 3 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ NrmGrp) | |
2 | 1 | 3ad2ant1 1128 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝑅 ∈ NrmGrp) |
3 | eqid 2819 | . . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
4 | nminvr.u | . . . 4 ⊢ 𝑈 = (Unit‘𝑅) | |
5 | 3, 4 | unitcl 19401 | . . 3 ⊢ (𝐴 ∈ 𝑈 → 𝐴 ∈ (Base‘𝑅)) |
6 | 5 | 3ad2ant3 1130 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ∈ (Base‘𝑅)) |
7 | eqid 2819 | . . . 4 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
8 | 4, 7 | nzrunit 20032 | . . 3 ⊢ ((𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ≠ (0g‘𝑅)) |
9 | 8 | 3adant1 1125 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ≠ (0g‘𝑅)) |
10 | nminvr.n | . . 3 ⊢ 𝑁 = (norm‘𝑅) | |
11 | 3, 10, 7 | nmne0 23220 | . 2 ⊢ ((𝑅 ∈ NrmGrp ∧ 𝐴 ∈ (Base‘𝑅) ∧ 𝐴 ≠ (0g‘𝑅)) → (𝑁‘𝐴) ≠ 0) |
12 | 2, 6, 9, 11 | syl3anc 1366 | 1 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1082 = wceq 1531 ∈ wcel 2108 ≠ wne 3014 ‘cfv 6348 0cc0 10529 Basecbs 16475 0gc0g 16705 Unitcui 19381 NzRingcnzr 20022 normcnm 23178 NrmGrpcngp 23179 NrmRingcnrg 23181 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1905 ax-6 1964 ax-7 2009 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2154 ax-12 2170 ax-ext 2791 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7453 ax-cnex 10585 ax-resscn 10586 ax-1cn 10587 ax-icn 10588 ax-addcl 10589 ax-addrcl 10590 ax-mulcl 10591 ax-mulrcl 10592 ax-mulcom 10593 ax-addass 10594 ax-mulass 10595 ax-distr 10596 ax-i2m1 10597 ax-1ne0 10598 ax-1rid 10599 ax-rnegex 10600 ax-rrecex 10601 ax-cnre 10602 ax-pre-lttri 10603 ax-pre-lttrn 10604 ax-pre-ltadd 10605 ax-pre-mulgt0 10606 ax-pre-sup 10607 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1534 df-ex 1775 df-nf 1779 df-sb 2064 df-mo 2616 df-eu 2648 df-clab 2798 df-cleq 2812 df-clel 2891 df-nfc 2961 df-ne 3015 df-nel 3122 df-ral 3141 df-rex 3142 df-reu 3143 df-rmo 3144 df-rab 3145 df-v 3495 df-sbc 3771 df-csb 3882 df-dif 3937 df-un 3939 df-in 3941 df-ss 3950 df-pss 3952 df-nul 4290 df-if 4466 df-pw 4539 df-sn 4560 df-pr 4562 df-tp 4564 df-op 4566 df-uni 4831 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7106 df-ov 7151 df-oprab 7152 df-mpo 7153 df-om 7573 df-1st 7681 df-2nd 7682 df-tpos 7884 df-wrecs 7939 df-recs 8000 df-rdg 8038 df-er 8281 df-map 8400 df-en 8502 df-dom 8503 df-sdom 8504 df-sup 8898 df-inf 8899 df-pnf 10669 df-mnf 10670 df-xr 10671 df-ltxr 10672 df-le 10673 df-sub 10864 df-neg 10865 df-div 11290 df-nn 11631 df-2 11692 df-3 11693 df-n0 11890 df-z 11974 df-uz 12236 df-q 12341 df-rp 12382 df-xneg 12499 df-xadd 12500 df-xmul 12501 df-ndx 16478 df-slot 16479 df-base 16481 df-sets 16482 df-ress 16483 df-plusg 16570 df-mulr 16571 df-0g 16707 df-topgen 16709 df-mgm 17844 df-sgrp 17893 df-mnd 17904 df-grp 18098 df-minusg 18099 df-mgp 19232 df-ur 19244 df-ring 19291 df-oppr 19365 df-dvdsr 19383 df-unit 19384 df-invr 19414 df-nzr 20023 df-psmet 20529 df-xmet 20530 df-bl 20532 df-mopn 20533 df-top 21494 df-topon 21511 df-topsp 21533 df-bases 21546 df-xms 22922 df-ms 22923 df-nm 23184 df-ngp 23185 df-nrg 23187 |
This theorem is referenced by: nminvr 23270 nmdvr 23271 |
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