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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 23268 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → 𝑆 ∈ NrmGrp) | |
2 | 1 | adantl 482 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → 𝑆 ∈ NrmGrp) |
3 | nghmrcl2 23269 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → 𝑈 ∈ NrmGrp) | |
4 | 3 | adantr 481 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → 𝑈 ∈ NrmGrp) |
5 | nghmghm 23270 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → 𝐹 ∈ (𝑇 GrpHom 𝑈)) | |
6 | nghmghm 23270 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → 𝐺 ∈ (𝑆 GrpHom 𝑇)) | |
7 | ghmco 18316 | . . 3 ⊢ ((𝐹 ∈ (𝑇 GrpHom 𝑈) ∧ 𝐺 ∈ (𝑆 GrpHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) | |
8 | 5, 6, 7 | syl2an 595 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) |
9 | eqid 2818 | . . . 4 ⊢ (𝑇 normOp 𝑈) = (𝑇 normOp 𝑈) | |
10 | 9 | nghmcl 23263 | . . 3 ⊢ (𝐹 ∈ (𝑇 NGHom 𝑈) → ((𝑇 normOp 𝑈)‘𝐹) ∈ ℝ) |
11 | eqid 2818 | . . . 4 ⊢ (𝑆 normOp 𝑇) = (𝑆 normOp 𝑇) | |
12 | 11 | nghmcl 23263 | . . 3 ⊢ (𝐺 ∈ (𝑆 NGHom 𝑇) → ((𝑆 normOp 𝑇)‘𝐺) ∈ ℝ) |
13 | remulcl 10610 | . . 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 595 | . 2 ⊢ ((𝐹 ∈ (𝑇 NGHom 𝑈) ∧ 𝐺 ∈ (𝑆 NGHom 𝑇)) → (((𝑇 normOp 𝑈)‘𝐹) · ((𝑆 normOp 𝑇)‘𝐺)) ∈ ℝ) |
15 | eqid 2818 | . . 3 ⊢ (𝑆 normOp 𝑈) = (𝑆 normOp 𝑈) | |
16 | 15, 9, 11 | nmoco 23273 | . 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 23262 | . 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 1370 | 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 396 ∈ wcel 2105 class class class wbr 5057 ∘ ccom 5552 ‘cfv 6348 (class class class)co 7145 ℝcr 10524 · cmul 10530 ≤ cle 10664 GrpHom cghm 18293 NrmGrpcngp 23114 normOp cnmo 23241 NGHom cnghm 23242 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 ax-pre-sup 10603 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rmo 3143 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-er 8278 df-map 8397 df-en 8498 df-dom 8499 df-sdom 8500 df-sup 8894 df-inf 8895 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-div 11286 df-nn 11627 df-2 11688 df-n0 11886 df-z 11970 df-uz 12232 df-q 12337 df-rp 12378 df-xneg 12495 df-xadd 12496 df-xmul 12497 df-ico 12732 df-0g 16703 df-topgen 16705 df-mgm 17840 df-sgrp 17889 df-mnd 17900 df-mhm 17944 df-grp 18044 df-ghm 18294 df-psmet 20465 df-xmet 20466 df-met 20467 df-bl 20468 df-mopn 20469 df-top 21430 df-topon 21447 df-topsp 21469 df-bases 21482 df-xms 22857 df-ms 22858 df-nm 23119 df-ngp 23120 df-nmo 23244 df-nghm 23245 |
This theorem is referenced by: nmhmco 23292 |
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