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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 11214 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) | |
| 2 | 1 | ancoms 458 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) |
| 3 | 2 | adantrr 717 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐶 · 𝐵) ∈ ℝ) |
| 4 | 3 | 3adant1 1130 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐶 · 𝐵) ∈ ℝ) |
| 5 | ltdiv1 12106 | . . 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 11219 | . . . . . 6 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
| 8 | 7 | adantr 480 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐵 ∈ ℂ) |
| 9 | recn 11219 | . . . . . 6 ⊢ (𝐶 ∈ ℝ → 𝐶 ∈ ℂ) | |
| 10 | 9 | ad2antrl 728 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐶 ∈ ℂ) |
| 11 | gt0ne0 11702 | . . . . . 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 12022 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐶 · 𝐵) / 𝐶) = 𝐵) |
| 14 | 13 | 3adant1 1130 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐶 · 𝐵) / 𝐶) = 𝐵) |
| 15 | 14 | breq2d 5131 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶) ↔ (𝐴 / 𝐶) < 𝐵)) |
| 16 | 6, 15 | bitr2d 280 | 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 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2108 ≠ wne 2932 class class class wbr 5119 (class class class)co 7405 ℂcc 11127 ℝcr 11128 0cc0 11129 · cmul 11134 < clt 11269 / cdiv 11894 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-resscn 11186 ax-1cn 11187 ax-icn 11188 ax-addcl 11189 ax-addrcl 11190 ax-mulcl 11191 ax-mulrcl 11192 ax-mulcom 11193 ax-addass 11194 ax-mulass 11195 ax-distr 11196 ax-i2m1 11197 ax-1ne0 11198 ax-1rid 11199 ax-rnegex 11200 ax-rrecex 11201 ax-cnre 11202 ax-pre-lttri 11203 ax-pre-lttrn 11204 ax-pre-ltadd 11205 ax-pre-mulgt0 11206 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-po 5561 df-so 5562 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-oprab 7409 df-mpo 7410 df-er 8719 df-en 8960 df-dom 8961 df-sdom 8962 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-sub 11468 df-neg 11469 df-div 11895 |
| This theorem is referenced by: ltdivmul2 12119 lt2mul2div 12120 ltrec 12124 supmul1 12211 avglt2 12480 3halfnz 12672 rpnnen1lem2 12993 rpnnen1lem1 12994 rpnnen1lem3 12995 rpnnen1lem5 12997 ltdivmuld 13102 qbtwnre 13215 modid 13913 expnbnd 14250 mertenslem1 15900 tanhlt1 16178 eirrlem 16222 fldivp1 16917 pcfaclem 16918 4sqlem12 16976 icopnfcnv 24891 ovolscalem1 25466 mbfmulc2lem 25600 itg2monolem3 25705 dveflem 25935 dvlt0 25962 ftc1lem4 25998 radcnvlem1 26374 tangtx 26466 cosne0 26490 cosordlem 26491 efif1olem4 26506 logcnlem4 26606 logf1o2 26611 atantan 26885 atanbndlem 26887 birthdaylem3 26915 basellem3 27045 ppiub 27167 bposlem1 27247 bposlem2 27248 bposlem6 27252 bposlem8 27254 gausslemma2dlem0c 27321 lgsquadlem1 27343 2sqlem8 27389 chebbnd1lem3 27434 chebbnd1 27435 ostth2lem2 27597 ex-fl 30428 nn0prpwlem 36340 ftc1cnnclem 37715 stoweidlem13 46042 logblt1b 48544 fldivexpfllog2 48545 |
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