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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 2739 | . . 3 ⊢ (norm‘𝐺) = (norm‘𝐺) | |
| 2 | eqid 2739 | . . 3 ⊢ (-g‘𝐺) = (-g‘𝐺) | |
| 3 | eqid 2739 | . . 3 ⊢ (dist‘𝐺) = (dist‘𝐺) | |
| 4 | 1, 2, 3 | isngp 24579 | . 2 ⊢ (𝐺 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ MetSp ∧ ((norm‘𝐺) ∘ (-g‘𝐺)) ⊆ (dist‘𝐺))) |
| 5 | 4 | simp1bi 1151 | 1 ⊢ (𝐺 ∈ NrmGrp → 𝐺 ∈ Grp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2119 ⊆ wss 3883 ∘ ccom 5622 ‘cfv 6485 distcds 17220 Grpcgrp 18900 -gcsg 18902 MetSpcms 24301 normcnm 24559 NrmGrpcngp 24560 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-co 5627 df-iota 6441 df-fv 6493 df-ngp 24566 |
| This theorem is referenced by: ngpds 24587 ngpds2 24589 ngpds3 24591 ngprcan 24593 isngp4 24595 ngpinvds 24596 ngpsubcan 24597 nmf 24598 nmge0 24600 nmeq0 24601 nminv 24604 nmmtri 24605 nmsub 24606 nmrtri 24607 nm2dif 24608 nmtri 24609 nmtri2 24610 ngpi 24611 nm0 24612 ngptgp 24619 tngngp2 24635 tnggrpr 24638 nrmtngnrm 24641 nlmdsdi 24664 nlmdsdir 24665 nrginvrcnlem 24674 ngpocelbl 24687 nmo0 24718 nmotri 24722 0nghm 24724 nmoid 24725 idnghm 24726 nmods 24727 nmcn 24828 nmoleub2lem2 25101 nmhmcn 25105 cphpyth 25201 cphipval2 25226 4cphipval2 25227 cphipval 25228 ipcnlem2 25229 nglmle 25287 qqhcn 34175 |
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