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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 2734 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2734 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2734 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24538 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1145 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 ⊆ wss 3899 ∘ ccom 5626 ‘cfv 6490 distcds 17184 Grpcgrp 18861 -gcsg 18863 MetSpcms 24260 normcnm 24518 NrmGrpcngp 24519 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-co 5631 df-iota 6446 df-fv 6498 df-ngp 24525 |
| This theorem is referenced by: ngpds 24546 ngpds2 24548 ngpds3 24550 ngprcan 24552 isngp4 24554 ngpinvds 24555 ngpsubcan 24556 nmf 24557 nmge0 24559 nmeq0 24560 nminv 24563 nmmtri 24564 nmsub 24565 nmrtri 24566 nm2dif 24567 nmtri 24568 nmtri2 24569 ngpi 24570 nm0 24571 ngptgp 24578 tngngp2 24594 tnggrpr 24597 nrmtngnrm 24600 nlmdsdi 24623 nlmdsdir 24624 nrginvrcnlem 24633 ngpocelbl 24646 nmo0 24677 nmotri 24681 0nghm 24683 nmoid 24684 idnghm 24685 nmods 24686 nmcn 24787 nmoleub2lem2 25070 nmhmcn 25074 cphpyth 25170 cphipval2 25195 4cphipval2 25196 cphipval 25197 ipcnlem2 25198 nglmle 25256 qqhcn 34097 |
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