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Mirrors > Home > MPE Home > Th. List > abslt | Structured version Visualization version GIF version |
Description: Absolute value and 'less than' relation. (Contributed by NM, 6-Apr-2005.) (Revised by Mario Carneiro, 29-May-2016.) |
Ref | Expression |
---|---|
abslt | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((abs‘𝐴) < 𝐵 ↔ (-𝐵 < 𝐴 ∧ 𝐴 < 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpll 763 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → 𝐴 ∈ ℝ) | |
2 | 1 | renegcld 11332 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → -𝐴 ∈ ℝ) |
3 | 1 | recnd 10934 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → 𝐴 ∈ ℂ) |
4 | abscl 14918 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (abs‘𝐴) ∈ ℝ) | |
5 | 3, 4 | syl 17 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → (abs‘𝐴) ∈ ℝ) |
6 | simplr 765 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → 𝐵 ∈ ℝ) | |
7 | leabs 14939 | . . . . . . . 8 ⊢ (-𝐴 ∈ ℝ → -𝐴 ≤ (abs‘-𝐴)) | |
8 | 2, 7 | syl 17 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → -𝐴 ≤ (abs‘-𝐴)) |
9 | absneg 14917 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (abs‘-𝐴) = (abs‘𝐴)) | |
10 | 3, 9 | syl 17 | . . . . . . 7 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → (abs‘-𝐴) = (abs‘𝐴)) |
11 | 8, 10 | breqtrd 5096 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → -𝐴 ≤ (abs‘𝐴)) |
12 | simpr 484 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → (abs‘𝐴) < 𝐵) | |
13 | 2, 5, 6, 11, 12 | lelttrd 11063 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → -𝐴 < 𝐵) |
14 | leabs 14939 | . . . . . . 7 ⊢ (𝐴 ∈ ℝ → 𝐴 ≤ (abs‘𝐴)) | |
15 | 14 | ad2antrr 722 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → 𝐴 ≤ (abs‘𝐴)) |
16 | 1, 5, 6, 15, 12 | lelttrd 11063 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → 𝐴 < 𝐵) |
17 | 13, 16 | jca 511 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (abs‘𝐴) < 𝐵) → (-𝐴 < 𝐵 ∧ 𝐴 < 𝐵)) |
18 | 17 | ex 412 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((abs‘𝐴) < 𝐵 → (-𝐴 < 𝐵 ∧ 𝐴 < 𝐵))) |
19 | absor 14940 | . . . . 5 ⊢ (𝐴 ∈ ℝ → ((abs‘𝐴) = 𝐴 ∨ (abs‘𝐴) = -𝐴)) | |
20 | 19 | adantr 480 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((abs‘𝐴) = 𝐴 ∨ (abs‘𝐴) = -𝐴)) |
21 | breq1 5073 | . . . . . . 7 ⊢ ((abs‘𝐴) = 𝐴 → ((abs‘𝐴) < 𝐵 ↔ 𝐴 < 𝐵)) | |
22 | 21 | biimprd 247 | . . . . . 6 ⊢ ((abs‘𝐴) = 𝐴 → (𝐴 < 𝐵 → (abs‘𝐴) < 𝐵)) |
23 | breq1 5073 | . . . . . . 7 ⊢ ((abs‘𝐴) = -𝐴 → ((abs‘𝐴) < 𝐵 ↔ -𝐴 < 𝐵)) | |
24 | 23 | biimprd 247 | . . . . . 6 ⊢ ((abs‘𝐴) = -𝐴 → (-𝐴 < 𝐵 → (abs‘𝐴) < 𝐵)) |
25 | 22, 24 | jaoa 952 | . . . . 5 ⊢ (((abs‘𝐴) = 𝐴 ∨ (abs‘𝐴) = -𝐴) → ((𝐴 < 𝐵 ∧ -𝐴 < 𝐵) → (abs‘𝐴) < 𝐵)) |
26 | 25 | ancomsd 465 | . . . 4 ⊢ (((abs‘𝐴) = 𝐴 ∨ (abs‘𝐴) = -𝐴) → ((-𝐴 < 𝐵 ∧ 𝐴 < 𝐵) → (abs‘𝐴) < 𝐵)) |
27 | 20, 26 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((-𝐴 < 𝐵 ∧ 𝐴 < 𝐵) → (abs‘𝐴) < 𝐵)) |
28 | 18, 27 | impbid 211 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((abs‘𝐴) < 𝐵 ↔ (-𝐴 < 𝐵 ∧ 𝐴 < 𝐵))) |
29 | ltnegcon1 11406 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (-𝐴 < 𝐵 ↔ -𝐵 < 𝐴)) | |
30 | 29 | anbi1d 629 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((-𝐴 < 𝐵 ∧ 𝐴 < 𝐵) ↔ (-𝐵 < 𝐴 ∧ 𝐴 < 𝐵))) |
31 | 28, 30 | bitrd 278 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((abs‘𝐴) < 𝐵 ↔ (-𝐵 < 𝐴 ∧ 𝐴 < 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 843 = wceq 1539 ∈ wcel 2108 class class class wbr 5070 ‘cfv 6418 ℂcc 10800 ℝcr 10801 < clt 10940 ≤ cle 10941 -cneg 11136 abscabs 14873 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-sup 9131 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-seq 13650 df-exp 13711 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 |
This theorem is referenced by: absdiflt 14957 abslti 15030 absltd 15069 tanregt0 25600 argregt0 25670 efopnlem2 25717 ftc1anclem1 35777 dvasin 35788 liminflimsupclim 43238 stoweidlem7 43438 |
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