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Mirrors > Home > MPE Home > Th. List > ngpi | Structured version Visualization version GIF version |
Description: The properties of a normed group, which is a group accompanied by a norm. (Contributed by AV, 7-Oct-2021.) |
Ref | Expression |
---|---|
ngpi.v | ⊢ 𝑉 = (Base‘𝑊) |
ngpi.n | ⊢ 𝑁 = (norm‘𝑊) |
ngpi.m | ⊢ − = (-g‘𝑊) |
ngpi.0 | ⊢ 0 = (0g‘𝑊) |
Ref | Expression |
---|---|
ngpi | ⊢ (𝑊 ∈ NrmGrp → (𝑊 ∈ Grp ∧ 𝑁:𝑉⟶ℝ ∧ ∀𝑥 ∈ 𝑉 (((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 ) ∧ ∀𝑦 ∈ 𝑉 (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ngpgrp 23451 | . 2 ⊢ (𝑊 ∈ NrmGrp → 𝑊 ∈ Grp) | |
2 | ngpi.v | . . 3 ⊢ 𝑉 = (Base‘𝑊) | |
3 | ngpi.n | . . 3 ⊢ 𝑁 = (norm‘𝑊) | |
4 | 2, 3 | nmf 23467 | . 2 ⊢ (𝑊 ∈ NrmGrp → 𝑁:𝑉⟶ℝ) |
5 | ngpi.0 | . . . . 5 ⊢ 0 = (0g‘𝑊) | |
6 | 2, 3, 5 | nmeq0 23470 | . . . 4 ⊢ ((𝑊 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉) → ((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 )) |
7 | ngpi.m | . . . . . . 7 ⊢ − = (-g‘𝑊) | |
8 | 2, 3, 7 | nmmtri 23474 | . . . . . 6 ⊢ ((𝑊 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉 ∧ 𝑦 ∈ 𝑉) → (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))) |
9 | 8 | 3expa 1120 | . . . . 5 ⊢ (((𝑊 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉) ∧ 𝑦 ∈ 𝑉) → (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))) |
10 | 9 | ralrimiva 3095 | . . . 4 ⊢ ((𝑊 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉) → ∀𝑦 ∈ 𝑉 (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))) |
11 | 6, 10 | jca 515 | . . 3 ⊢ ((𝑊 ∈ NrmGrp ∧ 𝑥 ∈ 𝑉) → (((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 ) ∧ ∀𝑦 ∈ 𝑉 (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦)))) |
12 | 11 | ralrimiva 3095 | . 2 ⊢ (𝑊 ∈ NrmGrp → ∀𝑥 ∈ 𝑉 (((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 ) ∧ ∀𝑦 ∈ 𝑉 (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦)))) |
13 | 1, 4, 12 | 3jca 1130 | 1 ⊢ (𝑊 ∈ NrmGrp → (𝑊 ∈ Grp ∧ 𝑁:𝑉⟶ℝ ∧ ∀𝑥 ∈ 𝑉 (((𝑁‘𝑥) = 0 ↔ 𝑥 = 0 ) ∧ ∀𝑦 ∈ 𝑉 (𝑁‘(𝑥 − 𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦))))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2112 ∀wral 3051 class class class wbr 5039 ⟶wf 6354 ‘cfv 6358 (class class class)co 7191 ℝcr 10693 0cc0 10694 + caddc 10697 ≤ cle 10833 Basecbs 16666 0gc0g 16898 Grpcgrp 18319 -gcsg 18321 normcnm 23428 NrmGrpcngp 23429 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 ax-pre-sup 10772 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-er 8369 df-map 8488 df-en 8605 df-dom 8606 df-sdom 8607 df-sup 9036 df-inf 9037 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-div 11455 df-nn 11796 df-2 11858 df-n0 12056 df-z 12142 df-uz 12404 df-q 12510 df-rp 12552 df-xneg 12669 df-xadd 12670 df-xmul 12671 df-0g 16900 df-topgen 16902 df-mgm 18068 df-sgrp 18117 df-mnd 18128 df-grp 18322 df-minusg 18323 df-sbg 18324 df-psmet 20309 df-xmet 20310 df-met 20311 df-bl 20312 df-mopn 20313 df-top 21745 df-topon 21762 df-topsp 21784 df-bases 21797 df-xms 23172 df-ms 23173 df-nm 23434 df-ngp 23435 |
This theorem is referenced by: ncvsi 24002 |
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