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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 24561 | . 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 3889 ∘ ccom 5635 ‘cfv 6498 distcds 17229 Grpcgrp 18909 -gcsg 18911 MetSpcms 24283 normcnm 24541 NrmGrpcngp 24542 |
| 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 2708 |
| 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 2715 df-cleq 2728 df-clel 2811 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-co 5640 df-iota 6454 df-fv 6506 df-ngp 24548 |
| This theorem is referenced by: ngpds 24569 ngpds2 24571 ngpds3 24573 ngprcan 24575 isngp4 24577 ngpinvds 24578 ngpsubcan 24579 nmf 24580 nmge0 24582 nmeq0 24583 nminv 24586 nmmtri 24587 nmsub 24588 nmrtri 24589 nm2dif 24590 nmtri 24591 nmtri2 24592 ngpi 24593 nm0 24594 ngptgp 24601 tngngp2 24617 tnggrpr 24620 nrmtngnrm 24623 nlmdsdi 24646 nlmdsdir 24647 nrginvrcnlem 24656 ngpocelbl 24669 nmo0 24700 nmotri 24704 0nghm 24706 nmoid 24707 idnghm 24708 nmods 24709 nmcn 24810 nmoleub2lem2 25083 nmhmcn 25087 cphpyth 25183 cphipval2 25208 4cphipval2 25209 cphipval 25210 ipcnlem2 25211 nglmle 25269 qqhcn 34135 |
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