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| Mirrors > Home > MPE Home > Th. List > nmoge0 | Structured version Visualization version GIF version | ||
| Description: The operator norm of an operator is nonnegative. (Contributed by Mario Carneiro, 18-Oct-2015.) |
| Ref | Expression |
|---|---|
| nmofval.1 | ⊢ 𝑁 = (𝑆 normOp 𝑇) |
| Ref | Expression |
|---|---|
| nmoge0 | ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) → 0 ≤ (𝑁‘𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elrege0 13398 | . . . . . 6 ⊢ (𝑟 ∈ (0[,)+∞) ↔ (𝑟 ∈ ℝ ∧ 0 ≤ 𝑟)) | |
| 2 | 1 | simprbi 497 | . . . . 5 ⊢ (𝑟 ∈ (0[,)+∞) → 0 ≤ 𝑟) |
| 3 | 2 | adantl 481 | . . . 4 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) ∧ 𝑟 ∈ (0[,)+∞)) → 0 ≤ 𝑟) |
| 4 | 3 | a1d 25 | . . 3 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) ∧ 𝑟 ∈ (0[,)+∞)) → (∀𝑥 ∈ (Base‘𝑆)((norm‘𝑇)‘(𝐹‘𝑥)) ≤ (𝑟 · ((norm‘𝑆)‘𝑥)) → 0 ≤ 𝑟)) |
| 5 | 4 | ralrimiva 3130 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) → ∀𝑟 ∈ (0[,)+∞)(∀𝑥 ∈ (Base‘𝑆)((norm‘𝑇)‘(𝐹‘𝑥)) ≤ (𝑟 · ((norm‘𝑆)‘𝑥)) → 0 ≤ 𝑟)) |
| 6 | 0xr 11183 | . . 3 ⊢ 0 ∈ ℝ* | |
| 7 | nmofval.1 | . . . 4 ⊢ 𝑁 = (𝑆 normOp 𝑇) | |
| 8 | eqid 2737 | . . . 4 ⊢ (Base‘𝑆) = (Base‘𝑆) | |
| 9 | eqid 2737 | . . . 4 ⊢ (norm‘𝑆) = (norm‘𝑆) | |
| 10 | eqid 2737 | . . . 4 ⊢ (norm‘𝑇) = (norm‘𝑇) | |
| 11 | 7, 8, 9, 10 | nmogelb 24691 | . . 3 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) ∧ 0 ∈ ℝ*) → (0 ≤ (𝑁‘𝐹) ↔ ∀𝑟 ∈ (0[,)+∞)(∀𝑥 ∈ (Base‘𝑆)((norm‘𝑇)‘(𝐹‘𝑥)) ≤ (𝑟 · ((norm‘𝑆)‘𝑥)) → 0 ≤ 𝑟))) |
| 12 | 6, 11 | mpan2 692 | . 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) → (0 ≤ (𝑁‘𝐹) ↔ ∀𝑟 ∈ (0[,)+∞)(∀𝑥 ∈ (Base‘𝑆)((norm‘𝑇)‘(𝐹‘𝑥)) ≤ (𝑟 · ((norm‘𝑆)‘𝑥)) → 0 ≤ 𝑟))) |
| 13 | 5, 12 | mpbird 257 | 1 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)) → 0 ≤ (𝑁‘𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∀wral 3052 class class class wbr 5086 ‘cfv 6492 (class class class)co 7360 ℝcr 11028 0cc0 11029 · cmul 11034 +∞cpnf 11167 ℝ*cxr 11169 ≤ cle 11171 [,)cico 13291 Basecbs 17170 GrpHom cghm 19178 normcnm 24551 NrmGrpcngp 24552 normOp cnmo 24680 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 ax-pre-sup 11107 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-sup 9348 df-inf 9349 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-ico 13295 df-nmo 24683 |
| This theorem is referenced by: isnghm3 24700 bddnghm 24701 nmoi 24703 nmoix 24704 nmo0 24710 nmoco 24712 nmotri 24714 nmoid 24717 nghmcn 24720 nmoleub2lem 25091 |
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