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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 24574 | . 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 3890 ∘ ccom 5629 ‘cfv 6493 distcds 17223 Grpcgrp 18903 -gcsg 18905 MetSpcms 24296 normcnm 24554 NrmGrpcngp 24555 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-co 5634 df-iota 6449 df-fv 6501 df-ngp 24561 |
| This theorem is referenced by: ngpds 24582 ngpds2 24584 ngpds3 24586 ngprcan 24588 isngp4 24590 ngpinvds 24591 ngpsubcan 24592 nmf 24593 nmge0 24595 nmeq0 24596 nminv 24599 nmmtri 24600 nmsub 24601 nmrtri 24602 nm2dif 24603 nmtri 24604 nmtri2 24605 ngpi 24606 nm0 24607 ngptgp 24614 tngngp2 24630 tnggrpr 24633 nrmtngnrm 24636 nlmdsdi 24659 nlmdsdir 24660 nrginvrcnlem 24669 ngpocelbl 24682 nmo0 24713 nmotri 24717 0nghm 24719 nmoid 24720 idnghm 24721 nmods 24722 nmcn 24823 nmoleub2lem2 25096 nmhmcn 25100 cphpyth 25196 cphipval2 25221 4cphipval2 25222 cphipval 25223 ipcnlem2 25224 nglmle 25282 qqhcn 34154 |
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