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Mirrors > Home > MPE Home > Th. List > idnghm | Structured version Visualization version GIF version |
Description: The identity operator is a normed group homomorphism. (Contributed by Mario Carneiro, 18-Oct-2015.) |
Ref | Expression |
---|---|
idnghm.2 | ⊢ 𝑉 = (Base‘𝑆) |
Ref | Expression |
---|---|
idnghm | ⊢ (𝑆 ∈ NrmGrp → ( I ↾ 𝑉) ∈ (𝑆 NGHom 𝑆)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2734 | . . . . 5 ⊢ (𝑆 normOp 𝑆) = (𝑆 normOp 𝑆) | |
2 | idnghm.2 | . . . . 5 ⊢ 𝑉 = (Base‘𝑆) | |
3 | eqid 2734 | . . . . 5 ⊢ (0g‘𝑆) = (0g‘𝑆) | |
4 | 1, 2, 3 | nmoid 24778 | . . . 4 ⊢ ((𝑆 ∈ NrmGrp ∧ {(0g‘𝑆)} ⊊ 𝑉) → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) = 1) |
5 | 1re 11258 | . . . 4 ⊢ 1 ∈ ℝ | |
6 | 4, 5 | eqeltrdi 2846 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ {(0g‘𝑆)} ⊊ 𝑉) → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) ∈ ℝ) |
7 | eleq2 2827 | . . . . . . . . . 10 ⊢ ({(0g‘𝑆)} = 𝑉 → (𝑥 ∈ {(0g‘𝑆)} ↔ 𝑥 ∈ 𝑉)) | |
8 | 7 | biimpar 477 | . . . . . . . . 9 ⊢ (({(0g‘𝑆)} = 𝑉 ∧ 𝑥 ∈ 𝑉) → 𝑥 ∈ {(0g‘𝑆)}) |
9 | elsni 4647 | . . . . . . . . 9 ⊢ (𝑥 ∈ {(0g‘𝑆)} → 𝑥 = (0g‘𝑆)) | |
10 | 8, 9 | syl 17 | . . . . . . . 8 ⊢ (({(0g‘𝑆)} = 𝑉 ∧ 𝑥 ∈ 𝑉) → 𝑥 = (0g‘𝑆)) |
11 | 10 | mpteq2dva 5247 | . . . . . . 7 ⊢ ({(0g‘𝑆)} = 𝑉 → (𝑥 ∈ 𝑉 ↦ 𝑥) = (𝑥 ∈ 𝑉 ↦ (0g‘𝑆))) |
12 | mptresid 6070 | . . . . . . 7 ⊢ ( I ↾ 𝑉) = (𝑥 ∈ 𝑉 ↦ 𝑥) | |
13 | fconstmpt 5750 | . . . . . . 7 ⊢ (𝑉 × {(0g‘𝑆)}) = (𝑥 ∈ 𝑉 ↦ (0g‘𝑆)) | |
14 | 11, 12, 13 | 3eqtr4g 2799 | . . . . . 6 ⊢ ({(0g‘𝑆)} = 𝑉 → ( I ↾ 𝑉) = (𝑉 × {(0g‘𝑆)})) |
15 | 14 | fveq2d 6910 | . . . . 5 ⊢ ({(0g‘𝑆)} = 𝑉 → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) = ((𝑆 normOp 𝑆)‘(𝑉 × {(0g‘𝑆)}))) |
16 | 1, 2, 3 | nmo0 24771 | . . . . . 6 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑆 ∈ NrmGrp) → ((𝑆 normOp 𝑆)‘(𝑉 × {(0g‘𝑆)})) = 0) |
17 | 16 | anidms 566 | . . . . 5 ⊢ (𝑆 ∈ NrmGrp → ((𝑆 normOp 𝑆)‘(𝑉 × {(0g‘𝑆)})) = 0) |
18 | 15, 17 | sylan9eqr 2796 | . . . 4 ⊢ ((𝑆 ∈ NrmGrp ∧ {(0g‘𝑆)} = 𝑉) → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) = 0) |
19 | 0re 11260 | . . . 4 ⊢ 0 ∈ ℝ | |
20 | 18, 19 | eqeltrdi 2846 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ {(0g‘𝑆)} = 𝑉) → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) ∈ ℝ) |
21 | ngpgrp 24627 | . . . . . 6 ⊢ (𝑆 ∈ NrmGrp → 𝑆 ∈ Grp) | |
22 | 2, 3 | grpidcl 18995 | . . . . . 6 ⊢ (𝑆 ∈ Grp → (0g‘𝑆) ∈ 𝑉) |
23 | 21, 22 | syl 17 | . . . . 5 ⊢ (𝑆 ∈ NrmGrp → (0g‘𝑆) ∈ 𝑉) |
24 | 23 | snssd 4813 | . . . 4 ⊢ (𝑆 ∈ NrmGrp → {(0g‘𝑆)} ⊆ 𝑉) |
25 | sspss 4111 | . . . 4 ⊢ ({(0g‘𝑆)} ⊆ 𝑉 ↔ ({(0g‘𝑆)} ⊊ 𝑉 ∨ {(0g‘𝑆)} = 𝑉)) | |
26 | 24, 25 | sylib 218 | . . 3 ⊢ (𝑆 ∈ NrmGrp → ({(0g‘𝑆)} ⊊ 𝑉 ∨ {(0g‘𝑆)} = 𝑉)) |
27 | 6, 20, 26 | mpjaodan 960 | . 2 ⊢ (𝑆 ∈ NrmGrp → ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) ∈ ℝ) |
28 | id 22 | . . 3 ⊢ (𝑆 ∈ NrmGrp → 𝑆 ∈ NrmGrp) | |
29 | 2 | idghm 19261 | . . . 4 ⊢ (𝑆 ∈ Grp → ( I ↾ 𝑉) ∈ (𝑆 GrpHom 𝑆)) |
30 | 21, 29 | syl 17 | . . 3 ⊢ (𝑆 ∈ NrmGrp → ( I ↾ 𝑉) ∈ (𝑆 GrpHom 𝑆)) |
31 | 1 | isnghm2 24760 | . . 3 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑆 ∈ NrmGrp ∧ ( I ↾ 𝑉) ∈ (𝑆 GrpHom 𝑆)) → (( I ↾ 𝑉) ∈ (𝑆 NGHom 𝑆) ↔ ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) ∈ ℝ)) |
32 | 28, 30, 31 | mpd3an23 1462 | . 2 ⊢ (𝑆 ∈ NrmGrp → (( I ↾ 𝑉) ∈ (𝑆 NGHom 𝑆) ↔ ((𝑆 normOp 𝑆)‘( I ↾ 𝑉)) ∈ ℝ)) |
33 | 27, 32 | mpbird 257 | 1 ⊢ (𝑆 ∈ NrmGrp → ( I ↾ 𝑉) ∈ (𝑆 NGHom 𝑆)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 847 = wceq 1536 ∈ wcel 2105 ⊆ wss 3962 ⊊ wpss 3963 {csn 4630 ↦ cmpt 5230 I cid 5581 × cxp 5686 ↾ cres 5690 ‘cfv 6562 (class class class)co 7430 ℝcr 11151 0cc0 11152 1c1 11153 Basecbs 17244 0gc0g 17485 Grpcgrp 18963 GrpHom cghm 19242 NrmGrpcngp 24605 normOp cnmo 24741 NGHom cnghm 24742 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-sep 5301 ax-nul 5311 ax-pow 5370 ax-pr 5437 ax-un 7753 ax-cnex 11208 ax-resscn 11209 ax-1cn 11210 ax-icn 11211 ax-addcl 11212 ax-addrcl 11213 ax-mulcl 11214 ax-mulrcl 11215 ax-mulcom 11216 ax-addass 11217 ax-mulass 11218 ax-distr 11219 ax-i2m1 11220 ax-1ne0 11221 ax-1rid 11222 ax-rnegex 11223 ax-rrecex 11224 ax-cnre 11225 ax-pre-lttri 11226 ax-pre-lttrn 11227 ax-pre-ltadd 11228 ax-pre-mulgt0 11229 ax-pre-sup 11230 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3377 df-reu 3378 df-rab 3433 df-v 3479 df-sbc 3791 df-csb 3908 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-pss 3982 df-nul 4339 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-iun 4997 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5640 df-we 5642 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-pred 6322 df-ord 6388 df-on 6389 df-lim 6390 df-suc 6391 df-iota 6515 df-fun 6564 df-fn 6565 df-f 6566 df-f1 6567 df-fo 6568 df-f1o 6569 df-fv 6570 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7887 df-1st 8012 df-2nd 8013 df-frecs 8304 df-wrecs 8335 df-recs 8409 df-rdg 8448 df-er 8743 df-map 8866 df-en 8984 df-dom 8985 df-sdom 8986 df-sup 9479 df-inf 9480 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11491 df-neg 11492 df-div 11918 df-nn 12264 df-2 12326 df-n0 12524 df-z 12611 df-uz 12876 df-q 12988 df-rp 13032 df-xneg 13151 df-xadd 13152 df-xmul 13153 df-ico 13389 df-0g 17487 df-topgen 17489 df-mgm 18665 df-sgrp 18744 df-mnd 18760 df-mhm 18808 df-grp 18966 df-ghm 19243 df-psmet 21373 df-xmet 21374 df-met 21375 df-bl 21376 df-mopn 21377 df-top 22915 df-topon 22932 df-topsp 22954 df-bases 22968 df-xms 24345 df-ms 24346 df-nm 24610 df-ngp 24611 df-nmo 24744 df-nghm 24745 |
This theorem is referenced by: idnmhm 24790 |
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