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| Mirrors > Home > MPE Home > Th. List > tngngpd | Structured version Visualization version GIF version | ||
| Description: Derive the axioms for a normed group from the axioms for a metric space. (Contributed by Mario Carneiro, 4-Oct-2015.) |
| Ref | Expression |
|---|---|
| tngngp.t | ⊢ 𝑇 = (𝐺 toNrmGrp 𝑁) |
| tngngp.x | ⊢ 𝑋 = (Base‘𝐺) |
| tngngp.m | ⊢ − = (-g‘𝐺) |
| tngngp.z | ⊢ 0 = (0g‘𝐺) |
| tngngpd.1 | ⊢ (𝜑 → 𝐺 ∈ Grp) |
| tngngpd.2 | ⊢ (𝜑 → 𝑁:𝑋⟶ℝ) |
| tngngpd.3 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 )) |
| tngngpd.4 | ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))) |
| Ref | Expression |
|---|---|
| tngngpd | ⊢ (𝜑 → 𝑇 ∈ NrmGrp) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tngngpd.1 | . 2 ⊢ (𝜑 → 𝐺 ∈ Grp) | |
| 2 | tngngpd.2 | . . . 4 ⊢ (𝜑 → 𝑁:𝑋⟶ℝ) | |
| 3 | tngngp.x | . . . . . 6 ⊢ 𝑋 = (Base‘𝐺) | |
| 4 | 3 | fvexi 6846 | . . . . 5 ⊢ 𝑋 ∈ V |
| 5 | reex 11118 | . . . . 5 ⊢ ℝ ∈ V | |
| 6 | fex2 7878 | . . . . 5 ⊢ ((𝑁:𝑋⟶ℝ ∧ 𝑋 ∈ V ∧ ℝ ∈ V) → 𝑁 ∈ V) | |
| 7 | 4, 5, 6 | mp3an23 1456 | . . . 4 ⊢ (𝑁:𝑋⟶ℝ → 𝑁 ∈ V) |
| 8 | tngngp.t | . . . . 5 ⊢ 𝑇 = (𝐺 toNrmGrp 𝑁) | |
| 9 | tngngp.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
| 10 | 8, 9 | tngds 24621 | . . . 4 ⊢ (𝑁 ∈ V → (𝑁 ∘ − ) = (dist‘𝑇)) |
| 11 | 2, 7, 10 | 3syl 18 | . . 3 ⊢ (𝜑 → (𝑁 ∘ − ) = (dist‘𝑇)) |
| 12 | tngngp.z | . . . 4 ⊢ 0 = (0g‘𝐺) | |
| 13 | tngngpd.3 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 )) | |
| 14 | tngngpd.4 | . . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))) | |
| 15 | 3, 9, 12, 1, 2, 13, 14 | nrmmetd 24547 | . . 3 ⊢ (𝜑 → (𝑁 ∘ − ) ∈ (Met‘𝑋)) |
| 16 | 11, 15 | eqeltrrd 2838 | . 2 ⊢ (𝜑 → (dist‘𝑇) ∈ (Met‘𝑋)) |
| 17 | eqid 2737 | . . . 4 ⊢ (dist‘𝑇) = (dist‘𝑇) | |
| 18 | 8, 3, 17 | tngngp2 24625 | . . 3 ⊢ (𝑁:𝑋⟶ℝ → (𝑇 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ (dist‘𝑇) ∈ (Met‘𝑋)))) |
| 19 | 2, 18 | syl 17 | . 2 ⊢ (𝜑 → (𝑇 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ (dist‘𝑇) ∈ (Met‘𝑋)))) |
| 20 | 1, 16, 19 | mpbir2and 714 | 1 ⊢ (𝜑 → 𝑇 ∈ NrmGrp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Vcvv 3430 class class class wbr 5086 ∘ ccom 5626 ⟶wf 6486 ‘cfv 6490 (class class class)co 7358 ℝcr 11026 0cc0 11027 + caddc 11030 ≤ cle 11169 Basecbs 17168 distcds 17218 0gc0g 17391 Grpcgrp 18898 -gcsg 18900 Metcmet 21328 NrmGrpcngp 24550 toNrmGrp ctng 24551 |
| 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-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 ax-pre-sup 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-er 8634 df-map 8766 df-en 8885 df-dom 8886 df-sdom 8887 df-sup 9346 df-inf 9347 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-div 11797 df-nn 12164 df-2 12233 df-3 12234 df-4 12235 df-5 12236 df-6 12237 df-7 12238 df-8 12239 df-9 12240 df-n0 12427 df-z 12514 df-dec 12634 df-uz 12778 df-q 12888 df-rp 12932 df-xneg 13052 df-xadd 13053 df-xmul 13054 df-sets 17123 df-slot 17141 df-ndx 17153 df-base 17169 df-plusg 17222 df-tset 17228 df-ds 17231 df-rest 17374 df-topn 17375 df-0g 17393 df-topgen 17395 df-mgm 18597 df-sgrp 18676 df-mnd 18692 df-grp 18901 df-minusg 18902 df-sbg 18903 df-psmet 21334 df-xmet 21335 df-met 21336 df-bl 21337 df-mopn 21338 df-top 22867 df-topon 22884 df-topsp 22906 df-bases 22919 df-xms 24293 df-ms 24294 df-nm 24555 df-ngp 24556 df-tng 24557 |
| This theorem is referenced by: tngngp 24627 tngngp3 24629 tcphcph 25212 |
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