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| Mirrors > Home > HSE Home > Th. List > norm3adifii | 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, 30-Sep-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| norm3dif.1 | ⊢ 𝐴 ∈ ℋ |
| norm3dif.2 | ⊢ 𝐵 ∈ ℋ |
| norm3dif.3 | ⊢ 𝐶 ∈ ℋ |
| Ref | Expression |
|---|---|
| norm3adifii | ⊢ (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | norm3dif.1 | . . . . . . . 8 ⊢ 𝐴 ∈ ℋ | |
| 2 | norm3dif.3 | . . . . . . . 8 ⊢ 𝐶 ∈ ℋ | |
| 3 | 1, 2 | hvsubcli 31628 | . . . . . . 7 ⊢ (𝐴 −ℎ 𝐶) ∈ ℋ |
| 4 | 3 | normcli 31738 | . . . . . 6 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ∈ ℝ |
| 5 | 4 | recni 11326 | . . . . 5 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ∈ ℂ |
| 6 | norm3dif.2 | . . . . . . . 8 ⊢ 𝐵 ∈ ℋ | |
| 7 | 6, 2 | hvsubcli 31628 | . . . . . . 7 ⊢ (𝐵 −ℎ 𝐶) ∈ ℋ |
| 8 | 7 | normcli 31738 | . . . . . 6 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ∈ ℝ |
| 9 | 8 | recni 11326 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ∈ ℂ |
| 10 | 5, 9 | negsubdi2i 11647 | . . . 4 ⊢ -((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) = ((normℎ‘(𝐵 −ℎ 𝐶)) − (normℎ‘(𝐴 −ℎ 𝐶))) |
| 11 | 6, 2, 1 | norm3difi 31754 | . . . . . 6 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ≤ ((normℎ‘(𝐵 −ℎ 𝐴)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 12 | 6, 1 | normsubi 31748 | . . . . . . 7 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) = (normℎ‘(𝐴 −ℎ 𝐵)) |
| 13 | 12 | oveq1i 7430 | . . . . . 6 ⊢ ((normℎ‘(𝐵 −ℎ 𝐴)) + (normℎ‘(𝐴 −ℎ 𝐶))) = ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 14 | 11, 13 | breqtri 5129 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 15 | 1, 6 | hvsubcli 31628 | . . . . . . 7 ⊢ (𝐴 −ℎ 𝐵) ∈ ℋ |
| 16 | 15 | normcli 31738 | . . . . . 6 ⊢ (normℎ‘(𝐴 −ℎ 𝐵)) ∈ ℝ |
| 17 | 8, 4, 16 | lesubaddi 11877 | . . . . 5 ⊢ (((normℎ‘(𝐵 −ℎ 𝐶)) − (normℎ‘(𝐴 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) ↔ (normℎ‘(𝐵 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐴 −ℎ 𝐶)))) |
| 18 | 14, 17 | mpbir 234 | . . . 4 ⊢ ((normℎ‘(𝐵 −ℎ 𝐶)) − (normℎ‘(𝐴 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 19 | 10, 18 | eqbrtri 5125 | . . 3 ⊢ -((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 20 | 4, 8 | resubcli 11623 | . . . 4 ⊢ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ∈ ℝ |
| 21 | 20, 16 | lenegcon1i 11871 | . . 3 ⊢ ( -((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) ↔ -(normℎ‘(𝐴 −ℎ 𝐵)) ≤ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) |
| 22 | 19, 21 | mpbi 233 | . 2 ⊢ -(normℎ‘(𝐴 −ℎ 𝐵)) ≤ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) |
| 23 | 1, 2, 6 | norm3difi 31754 | . . 3 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐵 −ℎ 𝐶))) |
| 24 | 4, 8, 16 | lesubaddi 11877 | . . 3 ⊢ (((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) ↔ (normℎ‘(𝐴 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐵 −ℎ 𝐶)))) |
| 25 | 23, 24 | mpbir 234 | . 2 ⊢ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 26 | 20, 16 | abslei 15564 | . 2 ⊢ ((abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) ↔ ( -(normℎ‘(𝐴 −ℎ 𝐵)) ≤ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ∧ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)))) |
| 27 | 22, 25, 26 | mpbir2an 724 | 1 ⊢ (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 class class class wbr 5102 ‘cfv 6538 (class class class)co 7420 + caddc 11206 ≤ cle 11347 − cmin 11544 -cneg 11545 abscabs 15406 ℋchba 31526 normℎcno 31530 −ℎ cmv 31532 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11259 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 ax-pre-sup 11281 ax-hfvadd 31607 ax-hvcom 31608 ax-hvass 31609 ax-hv0cl 31610 ax-hvaddid 31611 ax-hfvmul 31612 ax-hvmulid 31613 ax-hvmulass 31614 ax-hvdistr1 31615 ax-hvdistr2 31616 ax-hvmul0 31617 ax-hfi 31686 ax-his1 31689 ax-his2 31690 ax-his3 31691 ax-his4 31692 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-er 8720 df-en 8977 df-dom 8978 df-sdom 8979 df-sup 9437 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 df-nn 12339 df-2 12408 df-3 12409 df-4 12410 df-n0 12610 df-z 12697 df-uz 12969 df-rp 13124 df-seq 14148 df-exp 14208 df-cj 15271 df-re 15272 df-im 15273 df-sqrt 15407 df-abs 15408 df-hnorm 31575 df-hvsub 31578 |
| This theorem is used by: norm3adifi 31760 |
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