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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 2762 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2762 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2762 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24656 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1158 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2142 ⊆ wss 3904 ∘ ccom 5651 ‘cfv 6521 distcds 17295 Grpcgrp 18975 -gcsg 18977 MetSpcms 24378 normcnm 24636 NrmGrpcngp 24637 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-co 5656 df-iota 6477 df-fv 6529 df-ngp 24643 |
| This theorem is referenced by: ngpds 24664 ngpds2 24666 ngpds3 24668 ngprcan 24670 isngp4 24672 ngpinvds 24673 ngpsubcan 24674 nmf 24675 nmge0 24677 nmeq0 24678 nminv 24681 nmmtri 24682 nmsub 24683 nmrtri 24684 nm2dif 24685 nmtri 24686 nmtri2 24687 ngpi 24688 nm0 24689 ngptgp 24696 tngngp2 24712 tnggrpr 24715 nrmtngnrm 24718 nlmdsdi 24741 nlmdsdir 24742 nrginvrcnlem 24751 ngpocelbl 24764 nmo0 24795 nmotri 24799 0nghm 24801 nmoid 24802 idnghm 24803 nmods 24804 nmcn 24905 nmoleub2lem2 25178 nmhmcn 25182 cphpyth 25278 cphipval2 25303 4cphipval2 25304 cphipval 25305 ipcnlem2 25306 nglmle 25364 qqhcn 34288 |
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