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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 6888 | . . . . 5 ⊢ 𝑋 ∈ V |
| 5 | reex 11248 | . . . . 5 ⊢ ℝ ∈ V | |
| 6 | fex2 7932 | . . . . 5 ⊢ ((𝑁:𝑋⟶ℝ ∧ 𝑋 ∈ V ∧ ℝ ∈ V) → 𝑁 ∈ V) | |
| 7 | 4, 5, 6 | mp3an23 1482 | . . . 4 ⊢ (𝑁:𝑋⟶ℝ → 𝑁 ∈ V) |
| 8 | tngngp.t | . . . . 5 ⊢ 𝑇 = (𝐺 toNrmGrp 𝑁) | |
| 9 | tngngp.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
| 10 | 8, 9 | tngds 24914 | . . . 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 24840 | . . 3 ⊢ (𝜑 → (𝑁 ∘ − ) ∈ (Met‘𝑋)) |
| 16 | 11, 15 | eqeltrrd 2861 | . 2 ⊢ (𝜑 → (dist‘𝑇) ∈ (Met‘𝑋)) |
| 17 | eqid 2760 | . . . 4 ⊢ (dist‘𝑇) = (dist‘𝑇) | |
| 18 | 8, 3, 17 | tngngp2 24918 | . . 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 726 | 1 ⊢ (𝜑 → 𝑇 ∈ NrmGrp) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 Vcvv 3450 class class class wbr 5103 ∘ ccom 5652 ⟶wf 6524 ‘cfv 6528 (class class class)co 7409 ℝcr 11156 0cc0 11157 + caddc 11160 ≤ cle 11301 Basecbs 17334 distcds 17384 0gc0g 17557 Grpcgrp 19091 -gcsg 19093 Metcmet 21611 NrmGrpcngp 24843 toNrmGrp ctng 24844 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7735 ax-cnex 11213 ax-resscn 11214 ax-1cn 11215 ax-icn 11216 ax-addcl 11217 ax-addrcl 11218 ax-mulcl 11219 ax-mulrcl 11220 ax-mulcom 11221 ax-addass 11222 ax-mulass 11223 ax-distr 11224 ax-i2m1 11225 ax-1ne0 11226 ax-1rid 11227 ax-rnegex 11228 ax-rrecex 11229 ax-cnre 11230 ax-pre-lttri 11231 ax-pre-lttrn 11232 ax-pre-ltadd 11233 ax-pre-mulgt0 11234 ax-pre-sup 11235 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6294 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 df-riota 7366 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-sdom 8955 df-sup 9412 df-inf 9413 df-pnf 11302 df-mnf 11303 df-xr 11304 df-ltxr 11305 df-le 11306 df-sub 11500 df-neg 11501 df-div 11929 df-nn 12291 df-2 12360 df-3 12361 df-4 12362 df-5 12363 df-6 12364 df-7 12365 df-8 12366 df-9 12367 df-n0 12562 df-z 12649 df-dec 12770 df-uz 12921 df-q 13031 df-rp 13076 df-xneg 13196 df-xadd 13197 df-xmul 13198 df-sets 17289 df-slot 17307 df-ndx 17319 df-base 17335 df-plusg 17388 df-tset 17394 df-ds 17397 df-rest 17540 df-topn 17541 df-0g 17559 df-topgen 17561 df-mgm 18763 df-sgrp 18855 df-mnd 18871 df-grp 19094 df-minusg 19095 df-sbg 19096 df-psmet 21617 df-xmet 21618 df-met 21619 df-bl 21620 df-mopn 21621 df-top 23159 df-topon 23176 df-topsp 23198 df-bases 23211 df-xms 24586 df-ms 24587 df-nm 24848 df-ngp 24849 df-tng 24850 |
| This theorem is used by: tngngp 24920 tngngp3 24922 tcphcph 25505 |
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