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Mirrors > Home > MPE Home > Th. List > divelunit | Structured version Visualization version GIF version |
Description: A condition for a ratio to be a member of the closed unit interval. (Contributed by Scott Fenton, 11-Jun-2013.) |
Ref | Expression |
---|---|
divelunit | ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ∈ (0[,]1) ↔ 𝐴 ≤ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elicc01 13197 | . . 3 ⊢ ((𝐴 / 𝐵) ∈ (0[,]1) ↔ ((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵) ∧ (𝐴 / 𝐵) ≤ 1)) | |
2 | df-3an 1088 | . . 3 ⊢ (((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵) ∧ (𝐴 / 𝐵) ≤ 1) ↔ (((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵)) ∧ (𝐴 / 𝐵) ≤ 1)) | |
3 | 1, 2 | bitri 274 | . 2 ⊢ ((𝐴 / 𝐵) ∈ (0[,]1) ↔ (((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵)) ∧ (𝐴 / 𝐵) ≤ 1)) |
4 | 1re 10976 | . . . . 5 ⊢ 1 ∈ ℝ | |
5 | ledivmul 11851 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ≤ 1 ↔ 𝐴 ≤ (𝐵 · 1))) | |
6 | 4, 5 | mp3an2 1448 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ≤ 1 ↔ 𝐴 ≤ (𝐵 · 1))) |
7 | 6 | adantlr 712 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ≤ 1 ↔ 𝐴 ≤ (𝐵 · 1))) |
8 | simpll 764 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 𝐴 ∈ ℝ) | |
9 | simprl 768 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 𝐵 ∈ ℝ) | |
10 | gt0ne0 11440 | . . . . . . 7 ⊢ ((𝐵 ∈ ℝ ∧ 0 < 𝐵) → 𝐵 ≠ 0) | |
11 | 10 | adantl 482 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 𝐵 ≠ 0) |
12 | 8, 9, 11 | redivcld 11803 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → (𝐴 / 𝐵) ∈ ℝ) |
13 | divge0 11844 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 0 ≤ (𝐴 / 𝐵)) | |
14 | 12, 13 | jca 512 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵))) |
15 | 14 | biantrurd 533 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ≤ 1 ↔ (((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵)) ∧ (𝐴 / 𝐵) ≤ 1))) |
16 | recn 10962 | . . . . . 6 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
17 | 16 | ad2antrl 725 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 𝐵 ∈ ℂ) |
18 | 17 | mulid1d 10993 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → (𝐵 · 1) = 𝐵) |
19 | 18 | breq2d 5091 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → (𝐴 ≤ (𝐵 · 1) ↔ 𝐴 ≤ 𝐵)) |
20 | 7, 15, 19 | 3bitr3d 309 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((((𝐴 / 𝐵) ∈ ℝ ∧ 0 ≤ (𝐴 / 𝐵)) ∧ (𝐴 / 𝐵) ≤ 1) ↔ 𝐴 ≤ 𝐵)) |
21 | 3, 20 | bitrid 282 | 1 ⊢ (((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → ((𝐴 / 𝐵) ∈ (0[,]1) ↔ 𝐴 ≤ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 ∈ wcel 2110 ≠ wne 2945 class class class wbr 5079 (class class class)co 7271 ℂcc 10870 ℝcr 10871 0cc0 10872 1c1 10873 · cmul 10877 < clt 11010 ≤ cle 11011 / cdiv 11632 [,]cicc 13081 |
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 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7582 ax-cnex 10928 ax-resscn 10929 ax-1cn 10930 ax-icn 10931 ax-addcl 10932 ax-addrcl 10933 ax-mulcl 10934 ax-mulrcl 10935 ax-mulcom 10936 ax-addass 10937 ax-mulass 10938 ax-distr 10939 ax-i2m1 10940 ax-1ne0 10941 ax-1rid 10942 ax-rnegex 10943 ax-rrecex 10944 ax-cnre 10945 ax-pre-lttri 10946 ax-pre-lttrn 10947 ax-pre-ltadd 10948 ax-pre-mulgt0 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5163 df-id 5490 df-po 5504 df-so 5505 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-riota 7228 df-ov 7274 df-oprab 7275 df-mpo 7276 df-er 8481 df-en 8717 df-dom 8718 df-sdom 8719 df-pnf 11012 df-mnf 11013 df-xr 11014 df-ltxr 11015 df-le 11016 df-sub 11207 df-neg 11208 df-div 11633 df-icc 13085 |
This theorem is referenced by: brbtwn2 27271 axsegconlem7 27289 axcontlem2 27331 axcontlem4 27333 axcontlem7 27336 axcontlem8 27337 |
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