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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 31094 | . . . . . . 7 ⊢ (𝐴 −ℎ 𝐶) ∈ ℋ |
| 4 | 3 | normcli 31204 | . . . . . 6 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ∈ ℝ |
| 5 | 4 | recni 11161 | . . . . 5 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ∈ ℂ |
| 6 | norm3dif.2 | . . . . . . . 8 ⊢ 𝐵 ∈ ℋ | |
| 7 | 6, 2 | hvsubcli 31094 | . . . . . . 7 ⊢ (𝐵 −ℎ 𝐶) ∈ ℋ |
| 8 | 7 | normcli 31204 | . . . . . 6 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ∈ ℝ |
| 9 | 8 | recni 11161 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ∈ ℂ |
| 10 | 5, 9 | negsubdi2i 11482 | . . . 4 ⊢ -((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) = ((normℎ‘(𝐵 −ℎ 𝐶)) − (normℎ‘(𝐴 −ℎ 𝐶))) |
| 11 | 6, 2, 1 | norm3difi 31220 | . . . . . 6 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ≤ ((normℎ‘(𝐵 −ℎ 𝐴)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 12 | 6, 1 | normsubi 31214 | . . . . . . 7 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) = (normℎ‘(𝐴 −ℎ 𝐵)) |
| 13 | 12 | oveq1i 7379 | . . . . . 6 ⊢ ((normℎ‘(𝐵 −ℎ 𝐴)) + (normℎ‘(𝐴 −ℎ 𝐶))) = ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 14 | 11, 13 | breqtri 5111 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐴 −ℎ 𝐶))) |
| 15 | 1, 6 | hvsubcli 31094 | . . . . . . 7 ⊢ (𝐴 −ℎ 𝐵) ∈ ℋ |
| 16 | 15 | normcli 31204 | . . . . . 6 ⊢ (normℎ‘(𝐴 −ℎ 𝐵)) ∈ ℝ |
| 17 | 8, 4, 16 | lesubaddi 11710 | . . . . 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 231 | . . . 4 ⊢ ((normℎ‘(𝐵 −ℎ 𝐶)) − (normℎ‘(𝐴 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 19 | 10, 18 | eqbrtri 5107 | . . 3 ⊢ -((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 20 | 4, 8 | resubcli 11458 | . . . 4 ⊢ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ∈ ℝ |
| 21 | 20, 16 | lenegcon1i 11704 | . . 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 230 | . 2 ⊢ -(normℎ‘(𝐴 −ℎ 𝐵)) ≤ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) |
| 23 | 1, 2, 6 | norm3difi 31220 | . . 3 ⊢ (normℎ‘(𝐴 −ℎ 𝐶)) ≤ ((normℎ‘(𝐴 −ℎ 𝐵)) + (normℎ‘(𝐵 −ℎ 𝐶))) |
| 24 | 4, 8, 16 | lesubaddi 11710 | . . 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 231 | . 2 ⊢ ((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| 26 | 20, 16 | abslei 15356 | . 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 712 | 1 ⊢ (abs‘((normℎ‘(𝐴 −ℎ 𝐶)) − (normℎ‘(𝐵 −ℎ 𝐶)))) ≤ (normℎ‘(𝐴 −ℎ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 class class class wbr 5086 ‘cfv 6500 (class class class)co 7369 + caddc 11043 ≤ cle 11182 − cmin 11379 -cneg 11380 abscabs 15198 ℋchba 30992 normℎcno 30996 −ℎ cmv 30998 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7691 ax-cnex 11096 ax-resscn 11097 ax-1cn 11098 ax-icn 11099 ax-addcl 11100 ax-addrcl 11101 ax-mulcl 11102 ax-mulrcl 11103 ax-mulcom 11104 ax-addass 11105 ax-mulass 11106 ax-distr 11107 ax-i2m1 11108 ax-1ne0 11109 ax-1rid 11110 ax-rnegex 11111 ax-rrecex 11112 ax-cnre 11113 ax-pre-lttri 11114 ax-pre-lttrn 11115 ax-pre-ltadd 11116 ax-pre-mulgt0 11117 ax-pre-sup 11118 ax-hfvadd 31073 ax-hvcom 31074 ax-hvass 31075 ax-hv0cl 31076 ax-hvaddid 31077 ax-hfvmul 31078 ax-hvmulid 31079 ax-hvmulass 31080 ax-hvdistr1 31081 ax-hvdistr2 31082 ax-hvmul0 31083 ax-hfi 31152 ax-his1 31155 ax-his2 31156 ax-his3 31157 ax-his4 31158 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7820 df-2nd 7945 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9357 df-pnf 11183 df-mnf 11184 df-xr 11185 df-ltxr 11186 df-le 11187 df-sub 11381 df-neg 11382 df-div 11810 df-nn 12177 df-2 12246 df-3 12247 df-4 12248 df-n0 12440 df-z 12527 df-uz 12791 df-rp 12945 df-seq 13966 df-exp 14026 df-cj 15063 df-re 15064 df-im 15065 df-sqrt 15199 df-abs 15200 df-hnorm 31041 df-hvsub 31044 |
| This theorem is referenced by: norm3adifi 31226 |
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