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Mirrors > Home > MPE Home > Th. List > nminvr | Structured version Visualization version GIF version |
Description: The norm of an inverse in a nonzero normed ring. (Contributed by Mario Carneiro, 5-Oct-2015.) |
Ref | Expression |
---|---|
nminvr.n | ⊢ 𝑁 = (norm‘𝑅) |
nminvr.u | ⊢ 𝑈 = (Unit‘𝑅) |
nminvr.i | ⊢ 𝐼 = (invr‘𝑅) |
Ref | Expression |
---|---|
nminvr | ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐼‘𝐴)) = (1 / (𝑁‘𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nrgngp 23826 | . . . . 5 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ NrmGrp) | |
2 | 1 | 3ad2ant1 1132 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝑅 ∈ NrmGrp) |
3 | eqid 2738 | . . . . . 6 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
4 | nminvr.u | . . . . . 6 ⊢ 𝑈 = (Unit‘𝑅) | |
5 | 3, 4 | unitcl 19901 | . . . . 5 ⊢ (𝐴 ∈ 𝑈 → 𝐴 ∈ (Base‘𝑅)) |
6 | 5 | 3ad2ant3 1134 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ∈ (Base‘𝑅)) |
7 | nminvr.n | . . . . 5 ⊢ 𝑁 = (norm‘𝑅) | |
8 | 3, 7 | nmcl 23772 | . . . 4 ⊢ ((𝑅 ∈ NrmGrp ∧ 𝐴 ∈ (Base‘𝑅)) → (𝑁‘𝐴) ∈ ℝ) |
9 | 2, 6, 8 | syl2anc 584 | . . 3 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ∈ ℝ) |
10 | 9 | recnd 11003 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ∈ ℂ) |
11 | nzrring 20532 | . . . . . 6 ⊢ (𝑅 ∈ NzRing → 𝑅 ∈ Ring) | |
12 | 11 | 3ad2ant2 1133 | . . . . 5 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝑅 ∈ Ring) |
13 | simp3 1137 | . . . . 5 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝐴 ∈ 𝑈) | |
14 | nminvr.i | . . . . . 6 ⊢ 𝐼 = (invr‘𝑅) | |
15 | 4, 14, 3 | ringinvcl 19918 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ∈ 𝑈) → (𝐼‘𝐴) ∈ (Base‘𝑅)) |
16 | 12, 13, 15 | syl2anc 584 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝐼‘𝐴) ∈ (Base‘𝑅)) |
17 | 3, 7 | nmcl 23772 | . . . 4 ⊢ ((𝑅 ∈ NrmGrp ∧ (𝐼‘𝐴) ∈ (Base‘𝑅)) → (𝑁‘(𝐼‘𝐴)) ∈ ℝ) |
18 | 2, 16, 17 | syl2anc 584 | . . 3 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐼‘𝐴)) ∈ ℝ) |
19 | 18 | recnd 11003 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐼‘𝐴)) ∈ ℂ) |
20 | 7, 4 | unitnmn0 23832 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘𝐴) ≠ 0) |
21 | eqid 2738 | . . . . . 6 ⊢ (.r‘𝑅) = (.r‘𝑅) | |
22 | eqid 2738 | . . . . . 6 ⊢ (1r‘𝑅) = (1r‘𝑅) | |
23 | 4, 14, 21, 22 | unitrinv 19920 | . . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ∈ 𝑈) → (𝐴(.r‘𝑅)(𝐼‘𝐴)) = (1r‘𝑅)) |
24 | 12, 13, 23 | syl2anc 584 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝐴(.r‘𝑅)(𝐼‘𝐴)) = (1r‘𝑅)) |
25 | 24 | fveq2d 6778 | . . 3 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐴(.r‘𝑅)(𝐼‘𝐴))) = (𝑁‘(1r‘𝑅))) |
26 | simp1 1135 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → 𝑅 ∈ NrmRing) | |
27 | 3, 7, 21 | nmmul 23828 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝐴 ∈ (Base‘𝑅) ∧ (𝐼‘𝐴) ∈ (Base‘𝑅)) → (𝑁‘(𝐴(.r‘𝑅)(𝐼‘𝐴))) = ((𝑁‘𝐴) · (𝑁‘(𝐼‘𝐴)))) |
28 | 26, 6, 16, 27 | syl3anc 1370 | . . 3 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐴(.r‘𝑅)(𝐼‘𝐴))) = ((𝑁‘𝐴) · (𝑁‘(𝐼‘𝐴)))) |
29 | 7, 22 | nm1 23831 | . . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing) → (𝑁‘(1r‘𝑅)) = 1) |
30 | 29 | 3adant3 1131 | . . 3 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(1r‘𝑅)) = 1) |
31 | 25, 28, 30 | 3eqtr3d 2786 | . 2 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → ((𝑁‘𝐴) · (𝑁‘(𝐼‘𝐴))) = 1) |
32 | 10, 19, 20, 31 | mvllmuld 11807 | 1 ⊢ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ NzRing ∧ 𝐴 ∈ 𝑈) → (𝑁‘(𝐼‘𝐴)) = (1 / (𝑁‘𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ‘cfv 6433 (class class class)co 7275 ℝcr 10870 1c1 10872 · cmul 10876 / cdiv 11632 Basecbs 16912 .rcmulr 16963 1rcur 19737 Ringcrg 19783 Unitcui 19881 invrcinvr 19913 NzRingcnzr 20528 normcnm 23732 NrmGrpcngp 23733 NrmRingcnrg 23735 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-tpos 8042 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-inf 9202 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ico 13085 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-0g 17152 df-topgen 17154 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 df-mgp 19721 df-ur 19738 df-ring 19785 df-oppr 19862 df-dvdsr 19883 df-unit 19884 df-invr 19914 df-abv 20077 df-nzr 20529 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-xms 23473 df-ms 23474 df-nm 23738 df-ngp 23739 df-nrg 23741 |
This theorem is referenced by: nmdvr 23834 |
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