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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 2736 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2736 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2736 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24540 | . 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 3901 ∘ ccom 5628 ‘cfv 6492 distcds 17186 Grpcgrp 18863 -gcsg 18865 MetSpcms 24262 normcnm 24520 NrmGrpcngp 24521 |
| 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 2708 |
| 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 2715 df-cleq 2728 df-clel 2811 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-co 5633 df-iota 6448 df-fv 6500 df-ngp 24527 |
| This theorem is referenced by: ngpds 24548 ngpds2 24550 ngpds3 24552 ngprcan 24554 isngp4 24556 ngpinvds 24557 ngpsubcan 24558 nmf 24559 nmge0 24561 nmeq0 24562 nminv 24565 nmmtri 24566 nmsub 24567 nmrtri 24568 nm2dif 24569 nmtri 24570 nmtri2 24571 ngpi 24572 nm0 24573 ngptgp 24580 tngngp2 24596 tnggrpr 24599 nrmtngnrm 24602 nlmdsdi 24625 nlmdsdir 24626 nrginvrcnlem 24635 ngpocelbl 24648 nmo0 24679 nmotri 24683 0nghm 24685 nmoid 24686 idnghm 24687 nmods 24688 nmcn 24789 nmoleub2lem2 25072 nmhmcn 25076 cphpyth 25172 cphipval2 25197 4cphipval2 25198 cphipval 25199 ipcnlem2 25200 nglmle 25258 qqhcn 34148 |
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