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Mirrors > Home > MPE Home > Th. List > nmo0 | Structured version Visualization version GIF version |
Description: The operator norm of the zero operator. (Contributed by Mario Carneiro, 20-Oct-2015.) |
Ref | Expression |
---|---|
nmo0.1 | ⊢ 𝑁 = (𝑆 normOp 𝑇) |
nmo0.2 | ⊢ 𝑉 = (Base‘𝑆) |
nmo0.3 | ⊢ 0 = (0g‘𝑇) |
Ref | Expression |
---|---|
nmo0 | ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑁‘(𝑉 × { 0 })) = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nmo0.1 | . . 3 ⊢ 𝑁 = (𝑆 normOp 𝑇) | |
2 | nmo0.2 | . . 3 ⊢ 𝑉 = (Base‘𝑆) | |
3 | eqid 2738 | . . 3 ⊢ (norm‘𝑆) = (norm‘𝑆) | |
4 | eqid 2738 | . . 3 ⊢ (norm‘𝑇) = (norm‘𝑇) | |
5 | eqid 2738 | . . 3 ⊢ (0g‘𝑆) = (0g‘𝑆) | |
6 | simpl 482 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 𝑆 ∈ NrmGrp) | |
7 | simpr 484 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 𝑇 ∈ NrmGrp) | |
8 | ngpgrp 23661 | . . . 4 ⊢ (𝑆 ∈ NrmGrp → 𝑆 ∈ Grp) | |
9 | ngpgrp 23661 | . . . 4 ⊢ (𝑇 ∈ NrmGrp → 𝑇 ∈ Grp) | |
10 | nmo0.3 | . . . . 5 ⊢ 0 = (0g‘𝑇) | |
11 | 10, 2 | 0ghm 18763 | . . . 4 ⊢ ((𝑆 ∈ Grp ∧ 𝑇 ∈ Grp) → (𝑉 × { 0 }) ∈ (𝑆 GrpHom 𝑇)) |
12 | 8, 9, 11 | syl2an 595 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑉 × { 0 }) ∈ (𝑆 GrpHom 𝑇)) |
13 | 0red 10909 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 0 ∈ ℝ) | |
14 | 0le0 12004 | . . . 4 ⊢ 0 ≤ 0 | |
15 | 14 | a1i 11 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 0 ≤ 0) |
16 | 10 | fvexi 6770 | . . . . . . . 8 ⊢ 0 ∈ V |
17 | 16 | fvconst2 7061 | . . . . . . 7 ⊢ (𝑥 ∈ 𝑉 → ((𝑉 × { 0 })‘𝑥) = 0 ) |
18 | 17 | ad2antrl 724 | . . . . . 6 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((𝑉 × { 0 })‘𝑥) = 0 ) |
19 | 18 | fveq2d 6760 | . . . . 5 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘((𝑉 × { 0 })‘𝑥)) = ((norm‘𝑇)‘ 0 )) |
20 | 4, 10 | nm0 23691 | . . . . . 6 ⊢ (𝑇 ∈ NrmGrp → ((norm‘𝑇)‘ 0 ) = 0) |
21 | 20 | ad2antlr 723 | . . . . 5 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘ 0 ) = 0) |
22 | 19, 21 | eqtrd 2778 | . . . 4 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘((𝑉 × { 0 })‘𝑥)) = 0) |
23 | 2, 3 | nmcl 23678 | . . . . . . . 8 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉) → ((norm‘𝑆)‘𝑥) ∈ ℝ) |
24 | 23 | ad2ant2r 743 | . . . . . . 7 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑆)‘𝑥) ∈ ℝ) |
25 | 24 | recnd 10934 | . . . . . 6 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑆)‘𝑥) ∈ ℂ) |
26 | 25 | mul02d 11103 | . . . . 5 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → (0 · ((norm‘𝑆)‘𝑥)) = 0) |
27 | 14, 26 | breqtrrid 5108 | . . . 4 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → 0 ≤ (0 · ((norm‘𝑆)‘𝑥))) |
28 | 22, 27 | eqbrtrd 5092 | . . 3 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘((𝑉 × { 0 })‘𝑥)) ≤ (0 · ((norm‘𝑆)‘𝑥))) |
29 | 1, 2, 3, 4, 5, 6, 7, 12, 13, 15, 28 | nmolb2d 23788 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑁‘(𝑉 × { 0 })) ≤ 0) |
30 | 1 | nmoge0 23791 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ (𝑉 × { 0 }) ∈ (𝑆 GrpHom 𝑇)) → 0 ≤ (𝑁‘(𝑉 × { 0 }))) |
31 | 12, 30 | mpd3an3 1460 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 0 ≤ (𝑁‘(𝑉 × { 0 }))) |
32 | 1 | nmocl 23790 | . . . 4 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ (𝑉 × { 0 }) ∈ (𝑆 GrpHom 𝑇)) → (𝑁‘(𝑉 × { 0 })) ∈ ℝ*) |
33 | 12, 32 | mpd3an3 1460 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑁‘(𝑉 × { 0 })) ∈ ℝ*) |
34 | 0xr 10953 | . . 3 ⊢ 0 ∈ ℝ* | |
35 | xrletri3 12817 | . . 3 ⊢ (((𝑁‘(𝑉 × { 0 })) ∈ ℝ* ∧ 0 ∈ ℝ*) → ((𝑁‘(𝑉 × { 0 })) = 0 ↔ ((𝑁‘(𝑉 × { 0 })) ≤ 0 ∧ 0 ≤ (𝑁‘(𝑉 × { 0 }))))) | |
36 | 33, 34, 35 | sylancl 585 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → ((𝑁‘(𝑉 × { 0 })) = 0 ↔ ((𝑁‘(𝑉 × { 0 })) ≤ 0 ∧ 0 ≤ (𝑁‘(𝑉 × { 0 }))))) |
37 | 29, 31, 36 | mpbir2and 709 | 1 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑁‘(𝑉 × { 0 })) = 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 {csn 4558 class class class wbr 5070 × cxp 5578 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 0cc0 10802 · cmul 10807 ℝ*cxr 10939 ≤ cle 10941 Basecbs 16840 0gc0g 17067 Grpcgrp 18492 GrpHom cghm 18746 normcnm 23638 NrmGrpcngp 23639 normOp cnmo 23775 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-sup 9131 df-inf 9132 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-ico 13014 df-0g 17069 df-topgen 17071 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-mhm 18345 df-grp 18495 df-ghm 18747 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-topsp 21990 df-bases 22004 df-xms 23381 df-ms 23382 df-nm 23644 df-ngp 23645 df-nmo 23778 |
This theorem is referenced by: nmoeq0 23806 0nghm 23811 idnghm 23813 |
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