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| Mirrors > Home > MPE Home > Th. List > nghmco | Structured version Visualization version GIF version | ||
| Description: The composition of normed group homomorphisms is a normed group homomorphism. (Contributed by Mario Carneiro, 20-Oct-2015.) |
| Ref | Expression |
|---|---|
| nghmco | ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 NGHom 𝑈)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nghmrcl1 24710 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → 𝑆 ∈ NrmGrp) | |
| 2 | 1 | adantl 481 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → 𝑆 ∈ NrmGrp) |
| 3 | nghmrcl2 24711 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → 𝑈 ∈ NrmGrp) | |
| 4 | 3 | adantr 480 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → 𝑈 ∈ NrmGrp) |
| 5 | nghmghm 24712 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → 𝐹 ∈ (𝑇 GrpHom 𝑈)) | |
| 6 | nghmghm 24712 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → 𝐺 ∈ (𝑆 GrpHom 𝑇)) | |
| 7 | ghmco 19205 | . . 3 ⊢ ((𝐹 ∈ (𝑇 GrpHom 𝑈) ∧ 𝐺 ∈ (𝑆 GrpHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) | |
| 8 | 5, 6, 7 | syl2an 597 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) |
| 9 | eqid 2737 | . . . 4 ⊢ (𝑇 normOp 𝑈) = (𝑇 normOp 𝑈) | |
| 10 | 9 | nghmcl 24705 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → ((𝑇 normOp 𝑈)‘𝐹) ∈ ℝ) |
| 11 | eqid 2737 | . . . 4 ⊢ (𝑆 normOp 𝑇) = (𝑆 normOp 𝑇) | |
| 12 | 11 | nghmcl 24705 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → ((𝑆 normOp 𝑇)‘𝐺) ∈ ℝ) |
| 13 | remulcl 11117 | . . 3 ⊢ ((((𝑇 normOp 𝑈)‘𝐹) ∈ ℝ ∧ ((𝑆 normOp 𝑇)‘𝐺) ∈ ℝ) → (((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺)) ∈ ℝ) | |
| 14 | 10, 12, 13 | syl2an 597 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺)) ∈ ℝ) |
| 15 | eqid 2737 | . . 3 ⊢ (𝑆 normOp 𝑈) = (𝑆 normOp 𝑈) | |
| 16 | 15, 9, 11 | nmoco 24715 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → ((𝑆 normOp 𝑈)‘(𝐹 ∘ 𝐺)) ≤ (((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺))) |
| 17 | 15 | bddnghm 24704 | . 2 ⊢ (((𝑆 ∈ NrmGrp ∧ 𝑈 ∈ NrmGrp ∧ (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) ∧ ((((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺)) ∈ ℝ ∧ ((𝑆 normOp 𝑈)‘(𝐹 ∘ 𝐺)) ≤ (((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺)))) → (𝐹 ∘ 𝐺) ∈ (𝑆 NGHom 𝑈)) |
| 18 | 2, 4, 8, 14, 16, 17 | syl32anc 1381 | 1 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 NGHom 𝑈)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 class class class wbr 5086 ∘ ccom 5629 ‘cfv 6493 (class class class)co 7361 ℝcr 11031 · cmul 11037 ≤ cle 11174 GrpHom cghm 19181 NrmGrpcngp 24555 normOp cnmo 24683 NGHom cnghm 24684 |
| 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 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 ax-pre-sup 11110 |
| 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-pss 3910 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-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-1st 7936 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-sup 9349 df-inf 9350 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-div 11802 df-nn 12169 df-2 12238 df-n0 12432 df-z 12519 df-uz 12783 df-q 12893 df-rp 12937 df-xneg 13057 df-xadd 13058 df-xmul 13059 df-ico 13298 df-0g 17398 df-topgen 17400 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-mhm 18745 df-grp 18906 df-ghm 19182 df-psmet 21339 df-xmet 21340 df-met 21341 df-bl 21342 df-mopn 21343 df-top 22872 df-topon 22889 df-topsp 22911 df-bases 22924 df-xms 24298 df-ms 24299 df-nm 24560 df-ngp 24561 df-nmo 24686 df-nghm 24687 |
| This theorem is referenced by: nmhmco 24734 |
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