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Mirrors > Home > MPE Home > Th. List > ltdivmul | Structured version Visualization version GIF version |
Description: 'Less than' relationship between division and multiplication. (Contributed by NM, 18-Nov-2004.) |
Ref | Expression |
---|---|
ltdivmul | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 / 𝐶) < 𝐵 ↔ 𝐴 < (𝐶 · 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | remulcl 10059 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) | |
2 | 1 | ancoms 468 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) |
3 | 2 | adantrr 753 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐶 · 𝐵) ∈ ℝ) |
4 | 3 | 3adant1 1099 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐶 · 𝐵) ∈ ℝ) |
5 | ltdiv1 10925 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ (𝐶 · 𝐵) ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 < (𝐶 · 𝐵) ↔ (𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶))) | |
6 | 4, 5 | syld3an2 1413 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 < (𝐶 · 𝐵) ↔ (𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶))) |
7 | recn 10064 | . . . . . 6 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
8 | 7 | adantr 480 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐵 ∈ ℂ) |
9 | recn 10064 | . . . . . 6 ⊢ (𝐶 ∈ ℝ → 𝐶 ∈ ℂ) | |
10 | 9 | ad2antrl 764 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐶 ∈ ℂ) |
11 | gt0ne0 10531 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) | |
12 | 11 | adantl 481 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐶 ≠ 0) |
13 | 8, 10, 12 | divcan3d 10844 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐶 · 𝐵) / 𝐶) = 𝐵) |
14 | 13 | 3adant1 1099 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐶 · 𝐵) / 𝐶) = 𝐵) |
15 | 14 | breq2d 4697 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶) ↔ (𝐴 / 𝐶) < 𝐵)) |
16 | 6, 15 | bitr2d 269 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 / 𝐶) < 𝐵 ↔ 𝐴 < (𝐶 · 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 383 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 ≠ wne 2823 class class class wbr 4685 (class class class)co 6690 ℂcc 9972 ℝcr 9973 0cc0 9974 · cmul 9979 < clt 10112 / cdiv 10722 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rmo 2949 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-op 4217 df-uni 4469 df-br 4686 df-opab 4746 df-mpt 4763 df-id 5053 df-po 5064 df-so 5065 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-div 10723 |
This theorem is referenced by: ltdivmul2 10938 lt2mul2div 10939 ltrec 10943 supmul1 11030 avglt2 11309 3halfnz 11494 rpnnen1lem2 11852 rpnnen1lem1 11853 rpnnen1lem3 11854 rpnnen1lem5 11856 rpnnen1lem1OLD 11859 rpnnen1lem3OLD 11860 rpnnen1lem5OLD 11862 ltdivmuld 11961 qbtwnre 12068 modid 12735 expnbnd 13033 mertenslem1 14660 tanhlt1 14934 eirrlem 14976 fldivp1 15648 pcfaclem 15649 4sqlem12 15707 icopnfcnv 22788 ovolscalem1 23327 mbfmulc2lem 23459 itg2monolem3 23564 dveflem 23787 dvlt0 23813 ftc1lem4 23847 radcnvlem1 24212 tangtx 24302 cosne0 24321 cosordlem 24322 efif1olem4 24336 logcnlem4 24436 logf1o2 24441 atantan 24695 atanbndlem 24697 birthdaylem3 24725 basellem3 24854 ppiub 24974 bposlem1 25054 bposlem2 25055 bposlem6 25059 bposlem8 25061 gausslemma2dlem0c 25128 lgsquadlem1 25150 2sqlem8 25196 chebbnd1lem3 25205 chebbnd1 25206 ostth2lem2 25368 ex-fl 27434 nn0prpwlem 32442 ftc1cnnclem 33613 stoweidlem13 40548 logblt1b 42683 fldivexpfllog2 42684 |
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