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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 6895 | . . . . 5 ⊢ 𝑋 ∈ V |
| 5 | reex 11197 | . . . . 5 ⊢ ℝ ∈ V | |
| 6 | fex2 7931 | . . . . 5 ⊢ ((𝑁:𝑋⟶ℝ ∧ 𝑋 ∈ V ∧ ℝ ∈ V) → 𝑁 ∈ V) | |
| 7 | 4, 5, 6 | mp3an23 1481 | . . . 4 ⊢ (𝑁:𝑋⟶ℝ → 𝑁 ∈ V) |
| 8 | tngngp.t | . . . . 5 ⊢ 𝑇 = (𝐺 toNrmGrp 𝑁) | |
| 9 | tngngp.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
| 10 | 8, 9 | tngds 24816 | . . . 4 ⊢ (𝑁 ∈ V → (𝑁 ∘ − ) = (dist‘𝑇)) |
| 11 | 2, 7, 10 | 3syl 19 | . . 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 24742 | . . 3 ⊢ (𝜑 → (𝑁 ∘ − ) ∈ (Met‘𝑋)) |
| 16 | 11, 15 | eqeltrrd 2863 | . 2 ⊢ (𝜑 → (dist‘𝑇) ∈ (Met‘𝑋)) |
| 17 | eqid 2762 | . . . 4 ⊢ (dist‘𝑇) = (dist‘𝑇) | |
| 18 | 8, 3, 17 | tngngp2 24820 | . . 3 ⊢ (𝑁:𝑋⟶ℝ → (𝑇 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ (dist‘𝑇) ∈ (Met‘𝑋)))) |
| 19 | 2, 18 | syl 18 | . 2 ⊢ (𝜑 → (𝑇 ∈ NrmGrp ↔ (𝐺 ∈ Grp ∧ (dist‘𝑇) ∈ (Met‘𝑋)))) |
| 20 | 1, 16, 19 | mpbir2and 725 | 1 ⊢ (𝜑 → 𝑇 ∈ NrmGrp) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1569 ∈ wcel 2142 Vcvv 3454 class class class wbr 5108 ∘ ccom 5664 ⟶wf 6532 ‘cfv 6536 (class class class)co 7412 ℝcr 11105 0cc0 11106 + caddc 11109 ≤ cle 11250 Basecbs 17275 distcds 17325 0gc0g 17498 Grpcgrp 19006 -gcsg 19008 Metcmet 21519 NrmGrpcngp 24745 toNrmGrp ctng 24746 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-er 8692 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9400 df-inf 9401 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-div 11878 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-9 12316 df-n0 12511 df-z 12598 df-dec 12718 df-uz 12869 df-q 12979 df-rp 13023 df-xneg 13143 df-xadd 13144 df-xmul 13145 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-plusg 17329 df-tset 17335 df-ds 17338 df-rest 17481 df-topn 17482 df-0g 17500 df-topgen 17502 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-grp 19009 df-minusg 19010 df-sbg 19011 df-psmet 21525 df-xmet 21526 df-met 21527 df-bl 21528 df-mopn 21529 df-top 23062 df-topon 23079 df-topsp 23101 df-bases 23114 df-xms 24488 df-ms 24489 df-nm 24750 df-ngp 24751 df-tng 24752 |
| This theorem is used by: tngngp 24822 tngngp3 24824 tcphcph 25407 |
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