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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 2730 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2730 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2730 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24490 | . 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 2109 ⊆ wss 3916 ∘ ccom 5644 ‘cfv 6513 distcds 17235 Grpcgrp 18871 -gcsg 18873 MetSpcms 24212 normcnm 24470 NrmGrpcngp 24471 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2702 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2709 df-cleq 2722 df-clel 2804 df-rab 3409 df-v 3452 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-nul 4299 df-if 4491 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5110 df-opab 5172 df-co 5649 df-iota 6466 df-fv 6521 df-ngp 24477 |
| This theorem is referenced by: ngpds 24498 ngpds2 24500 ngpds3 24502 ngprcan 24504 isngp4 24506 ngpinvds 24507 ngpsubcan 24508 nmf 24509 nmge0 24511 nmeq0 24512 nminv 24515 nmmtri 24516 nmsub 24517 nmrtri 24518 nm2dif 24519 nmtri 24520 nmtri2 24521 ngpi 24522 nm0 24523 ngptgp 24530 tngngp2 24546 tnggrpr 24549 nrmtngnrm 24552 nlmdsdi 24575 nlmdsdir 24576 nrginvrcnlem 24585 ngpocelbl 24598 nmo0 24629 nmotri 24633 0nghm 24635 nmoid 24636 idnghm 24637 nmods 24638 nmcn 24739 nmoleub2lem2 25022 nmhmcn 25026 cphpyth 25122 cphipval2 25147 4cphipval2 25148 cphipval 25149 ipcnlem2 25150 nglmle 25208 qqhcn 33987 |
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