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| Mirrors > Home > MPE Home > Th. List > ngpgrp | Structured version Visualization version GIF version | ||
| Description: A normed group is a group. (Contributed by Mario Carneiro, 2-Oct-2015.) |
| Ref | Expression |
|---|---|
| ngpgrp | ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2769 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2769 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2769 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24721 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1161 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2149 ⊆ wss 3913 ∘ ccom 5666 ‘cfv 6537 distcds 17318 Grpcgrp 18999 -gcsg 19001 MetSpcms 24443 normcnm 24701 NrmGrpcngp 24702 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-co 5671 df-iota 6493 df-fv 6545 df-ngp 24708 |
| This theorem is referenced by: ngpds 24729 ngpds2 24731 ngpds3 24733 ngprcan 24735 isngp4 24737 ngpinvds 24738 ngpsubcan 24739 nmf 24740 nmge0 24742 nmeq0 24743 nminv 24746 nmmtri 24747 nmsub 24748 nmrtri 24749 nm2dif 24750 nmtri 24751 nmtri2 24752 ngpi 24753 nm0 24754 ngptgp 24761 tngngp2 24777 tnggrpr 24780 nrmtngnrm 24783 nlmdsdi 24806 nlmdsdir 24807 nrginvrcnlem 24816 ngpocelbl 24829 nmo0 24860 nmotri 24864 0nghm 24866 nmoid 24867 idnghm 24868 nmods 24869 nmcn 24970 nmoleub2lem2 25243 nmhmcn 25247 cphpyth 25343 cphipval2 25368 4cphipval2 25369 cphipval 25370 ipcnlem2 25371 nglmle 25429 qqhcn 34325 |
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