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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 2737 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2737 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2737 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24552 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1146 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 ⊆ wss 3903 ∘ ccom 5636 ‘cfv 6500 distcds 17198 Grpcgrp 18875 -gcsg 18877 MetSpcms 24274 normcnm 24532 NrmGrpcngp 24533 |
| 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-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-co 5641 df-iota 6456 df-fv 6508 df-ngp 24539 |
| This theorem is referenced by: ngpds 24560 ngpds2 24562 ngpds3 24564 ngprcan 24566 isngp4 24568 ngpinvds 24569 ngpsubcan 24570 nmf 24571 nmge0 24573 nmeq0 24574 nminv 24577 nmmtri 24578 nmsub 24579 nmrtri 24580 nm2dif 24581 nmtri 24582 nmtri2 24583 ngpi 24584 nm0 24585 ngptgp 24592 tngngp2 24608 tnggrpr 24611 nrmtngnrm 24614 nlmdsdi 24637 nlmdsdir 24638 nrginvrcnlem 24647 ngpocelbl 24660 nmo0 24691 nmotri 24695 0nghm 24697 nmoid 24698 idnghm 24699 nmods 24700 nmcn 24801 nmoleub2lem2 25084 nmhmcn 25088 cphpyth 25184 cphipval2 25209 4cphipval2 25210 cphipval 25211 ipcnlem2 25212 nglmle 25270 qqhcn 34169 |
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