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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 |
---|---|
norm3adifi | ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 6556 | . . . . . 6 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (𝐴 −ℎ 𝐶) = (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) | |
2 | 1 | fveq2d 6107 | . . . . 5 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (normℎ‘(𝐴 −ℎ 𝐶)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶))) |
3 | 2 | oveq1d 6564 | . . . 4 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) = ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) |
4 | 3 | fveq2d 6107 | . . 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))))) |
5 | oveq1 6556 | . . . 4 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (𝐴 −ℎ 𝐵) = (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) | |
6 | 5 | fveq2d 6107 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵))) |
7 | 4, 6 | breq12d 4596 | . 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)))) |
8 | oveq1 6556 | . . . . . 6 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (𝐵 −ℎ 𝐶) = (if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶)) | |
9 | 8 | fveq2d 6107 | . . . . 5 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (normℎ‘(𝐵 −ℎ 𝐶)) = (normℎ‘(if(𝐵 ∈ ℋ, 𝐵, 0ℎ) −ℎ 𝐶))) |
10 | 9 | oveq2d 6565 | . . . 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)))) |
11 | 10 | fveq2d 6107 | . . 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))))) |
12 | oveq2 6557 | . . . 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))) | |
13 | 12 | fveq2d 6107 | . . 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)))) |
14 | 11, 13 | breq12d 4596 | . 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))))) |
15 | ifhvhv0 27263 | . . 3 ⊢ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) ∈ ℋ | |
16 | ifhvhv0 27263 | . . 3 ⊢ if(𝐵 ∈ ℋ, 𝐵, 0ℎ) ∈ ℋ | |
17 | norm3adift.1 | . . 3 ⊢ 𝐶 ∈ ℋ | |
18 | 15, 16, 17 | norm3adifii 27389 | . 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))) |
19 | 7, 14, 18 | dedth2h 4090 | 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 383 = wceq 1475 ∈ wcel 1977 ifcif 4036 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 ≤ cle 9954 − cmin 10145 abscabs 13822 ℋchil 27160 normℎcno 27164 0ℎc0v 27165 −ℎ cmv 27166 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 ax-hfvadd 27241 ax-hvcom 27242 ax-hvass 27243 ax-hv0cl 27244 ax-hvaddid 27245 ax-hfvmul 27246 ax-hvmulid 27247 ax-hvmulass 27248 ax-hvdistr1 27249 ax-hvdistr2 27250 ax-hvmul0 27251 ax-hfi 27320 ax-his1 27323 ax-his2 27324 ax-his3 27325 ax-his4 27326 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-sup 8231 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-4 10958 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-seq 12664 df-exp 12723 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-hnorm 27209 df-hvsub 27212 |
This theorem is referenced by: (None) |
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