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Mirrors > Home > HSE Home > Th. List > norm3adifi | Structured version Visualization version GIF version |
Description: Norm of differences around common element. Part of Lemma 3.6 of [Beran] p. 101. (Contributed by NM, 3-Oct-1999.) (New usage is discouraged.) |
Ref | Expression |
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norm3adift.1 | ⊢ 𝐶 ∈ ℋ |
Ref | Expression |
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norm3adifi | ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fvoveq1 7196 | . . . 4 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (normℎ‘(𝐴 −ℎ 𝐶)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶))) | |
2 | 1 | fvoveq1d 7195 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) = (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))))) |
3 | fvoveq1 7196 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵))) | |
4 | 2, 3 | breq12d 5044 | . 2 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → ((abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) ↔ (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)))) |
5 | fvoveq1 7196 | . . . . 5 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (normℎ‘(𝐵 −ℎ 𝐶)) = (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶))) | |
6 | 5 | oveq2d 7189 | . . . 4 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) = ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶)))) |
7 | 6 | fveq2d 6681 | . . 3 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) = (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶))))) |
8 | oveq2 7181 | . . . 4 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵) = (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) | |
9 | 8 | fveq2d 6681 | . . 3 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ)))) |
10 | 7, 9 | breq12d 5044 | . 2 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → ((abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) ↔ (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶)))) ≤ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))))) |
11 | ifhvhv0 28960 | . . 3 ⊢ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) ∈ ℋ | |
12 | ifhvhv0 28960 | . . 3 ⊢ if(𝐵 ∈ ℋ, 𝐵, 0ℎ) ∈ ℋ | |
13 | norm3adift.1 | . . 3 ⊢ 𝐶 ∈ ℋ | |
14 | 11, 12, 13 | norm3adifii 29086 | . 2 ⊢ (abs‘((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶)))) ≤ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) |
15 | 4, 10, 14 | dedth2h 4474 | 1 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1542 ∈ wcel 2114 ifcif 4415 class class class wbr 5031 ‘cfv 6340 (class class class)co 7173 ≤ cle 10757 − cmin 10951 abscabs 14686 ℋchba 28857 normℎcno 28861 0ℎc0v 28862 −ℎ cmv 28863 |
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 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2711 ax-sep 5168 ax-nul 5175 ax-pow 5233 ax-pr 5297 ax-un 7482 ax-cnex 10674 ax-resscn 10675 ax-1cn 10676 ax-icn 10677 ax-addcl 10678 ax-addrcl 10679 ax-mulcl 10680 ax-mulrcl 10681 ax-mulcom 10682 ax-addass 10683 ax-mulass 10684 ax-distr 10685 ax-i2m1 10686 ax-1ne0 10687 ax-1rid 10688 ax-rnegex 10689 ax-rrecex 10690 ax-cnre 10691 ax-pre-lttri 10692 ax-pre-lttrn 10693 ax-pre-ltadd 10694 ax-pre-mulgt0 10695 ax-pre-sup 10696 ax-hfvadd 28938 ax-hvcom 28939 ax-hvass 28940 ax-hv0cl 28941 ax-hvaddid 28942 ax-hfvmul 28943 ax-hvmulid 28944 ax-hvmulass 28945 ax-hvdistr1 28946 ax-hvdistr2 28947 ax-hvmul0 28948 ax-hfi 29017 ax-his1 29020 ax-his2 29021 ax-his3 29022 ax-his4 29023 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2541 df-eu 2571 df-clab 2718 df-cleq 2731 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3401 df-sbc 3682 df-csb 3792 df-dif 3847 df-un 3849 df-in 3851 df-ss 3861 df-pss 3863 df-nul 4213 df-if 4416 df-pw 4491 df-sn 4518 df-pr 4520 df-tp 4522 df-op 4524 df-uni 4798 df-iun 4884 df-br 5032 df-opab 5094 df-mpt 5112 df-tr 5138 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5484 df-we 5486 df-xp 5532 df-rel 5533 df-cnv 5534 df-co 5535 df-dm 5536 df-rn 5537 df-res 5538 df-ima 5539 df-pred 6130 df-ord 6176 df-on 6177 df-lim 6178 df-suc 6179 df-iota 6298 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-riota 7130 df-ov 7176 df-oprab 7177 df-mpo 7178 df-om 7603 df-2nd 7718 df-wrecs 7979 df-recs 8040 df-rdg 8078 df-er 8323 df-en 8559 df-dom 8560 df-sdom 8561 df-sup 8982 df-pnf 10758 df-mnf 10759 df-xr 10760 df-ltxr 10761 df-le 10762 df-sub 10953 df-neg 10954 df-div 11379 df-nn 11720 df-2 11782 df-3 11783 df-4 11784 df-n0 11980 df-z 12066 df-uz 12328 df-rp 12476 df-seq 13464 df-exp 13525 df-cj 14551 df-re 14552 df-im 14553 df-sqrt 14687 df-abs 14688 df-hnorm 28906 df-hvsub 28909 |
This theorem is referenced by: (None) |
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