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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 2763 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2763 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2763 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24753 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1163 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 ⊆ wss 3905 ∘ ccom 5665 ‘cfv 6536 distcds 17314 Grpcgrp 18995 -gcsg 18997 MetSpcms 24475 normcnm 24733 NrmGrpcngp 24734 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-co 5670 df-iota 6492 df-fv 6544 df-ngp 24740 |
| This theorem is referenced by: ngpds 24761 ngpds2 24763 ngpds3 24765 ngprcan 24767 isngp4 24769 ngpinvds 24770 ngpsubcan 24771 nmf 24772 nmge0 24774 nmeq0 24775 nminv 24778 nmmtri 24779 nmsub 24780 nmrtri 24781 nm2dif 24782 nmtri 24783 nmtri2 24784 ngpi 24785 nm0 24786 ngptgp 24793 tngngp2 24809 tnggrpr 24812 nrmtngnrm 24815 nlmdsdi 24838 nlmdsdir 24839 nrginvrcnlem 24848 ngpocelbl 24861 nmo0 24892 nmotri 24896 0nghm 24898 nmoid 24899 idnghm 24900 nmods 24901 nmcn 25002 nmoleub2lem2 25275 nmhmcn 25279 cphpyth 25375 cphipval2 25400 4cphipval2 25401 cphipval 25402 ipcnlem2 25403 nglmle 25461 qqhcn 34381 |
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