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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 2739 | . . 3 ⊢ (norm‘𝑆) = (norm‘𝑆) | |
4 | eqid 2739 | . . 3 ⊢ (norm‘𝑇) = (norm‘𝑇) | |
5 | eqid 2739 | . . 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 23736 | . . . 4 ⊢ (𝑆 ∈ NrmGrp → 𝑆 ∈ Grp) | |
9 | ngpgrp 23736 | . . . 4 ⊢ (𝑇 ∈ NrmGrp → 𝑇 ∈ Grp) | |
10 | nmo0.3 | . . . . 5 ⊢ 0 = (0g‘𝑇) | |
11 | 10, 2 | 0ghm 18829 | . . . 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 10962 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 0 ∈ ℝ) | |
14 | 0le0 12057 | . . . 4 ⊢ 0 ≤ 0 | |
15 | 14 | a1i 11 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 0 ≤ 0) |
16 | 10 | fvexi 6782 | . . . . . . . 8 ⊢ 0 ∈ V |
17 | 16 | fvconst2 7073 | . . . . . . 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 6772 | . . . . 5 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘((𝑉 × { 0 })‘𝑥)) = ((norm‘𝑇)‘ 0 )) |
20 | 4, 10 | nm0 23766 | . . . . . 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 2779 | . . . 4 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑇)‘((𝑉 × { 0 })‘𝑥)) = 0) |
23 | 2, 3 | nmcl 23753 | . . . . . . . 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 10987 | . . . . . 6 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → ((norm‘𝑆)‘𝑥) ∈ ℂ) |
26 | 25 | mul02d 11156 | . . . . 5 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → (0 · ((norm‘𝑆)‘𝑥)) = 0) |
27 | 14, 26 | breqtrrid 5116 | . . . 4 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) ∧ (𝑥 ∈ 𝑉 ∧ 𝑥 ≠ (0g‘𝑆))) → 0 ≤ (0 · ((norm‘𝑆)‘𝑥))) |
28 | 22, 27 | eqbrtrd 5100 | . . 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 23863 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑁‘(𝑉 × { 0 })) ≤ 0) |
30 | 1 | nmoge0 23866 | . . 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 23865 | . . . 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 11006 | . . 3 ⊢ 0 ∈ ℝ* | |
35 | xrletri3 12870 | . . 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 1541 ∈ wcel 2109 ≠ wne 2944 {csn 4566 class class class wbr 5078 × cxp 5586 ‘cfv 6430 (class class class)co 7268 ℝcr 10854 0cc0 10855 · cmul 10860 ℝ*cxr 10992 ≤ cle 10994 Basecbs 16893 0gc0g 17131 Grpcgrp 18558 GrpHom cghm 18812 normcnm 23713 NrmGrpcngp 23714 normOp cnmo 23850 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 ax-pre-sup 10933 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-1st 7817 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-er 8472 df-map 8591 df-en 8708 df-dom 8709 df-sdom 8710 df-sup 9162 df-inf 9163 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-2 12019 df-n0 12217 df-z 12303 df-uz 12565 df-q 12671 df-rp 12713 df-xneg 12830 df-xadd 12831 df-xmul 12832 df-ico 13067 df-0g 17133 df-topgen 17135 df-mgm 18307 df-sgrp 18356 df-mnd 18367 df-mhm 18411 df-grp 18561 df-ghm 18813 df-psmet 20570 df-xmet 20571 df-met 20572 df-bl 20573 df-mopn 20574 df-top 22024 df-topon 22041 df-topsp 22063 df-bases 22077 df-xms 23454 df-ms 23455 df-nm 23719 df-ngp 23720 df-nmo 23853 |
This theorem is referenced by: nmoeq0 23881 0nghm 23886 idnghm 23888 |
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