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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 11002 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) | |
2 | 1 | ancoms 460 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐶 · 𝐵) ∈ ℝ) |
3 | 2 | adantrr 715 | . . . 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 11885 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ (𝐶 · 𝐵) ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 < (𝐶 · 𝐵) ↔ (𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶))) | |
6 | 4, 5 | syld3an2 1411 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 < (𝐶 · 𝐵) ↔ (𝐴 / 𝐶) < ((𝐶 · 𝐵) / 𝐶))) |
7 | recn 11007 | . . . . . 6 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
8 | 7 | adantr 482 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐵 ∈ ℂ) |
9 | recn 11007 | . . . . . 6 ⊢ (𝐶 ∈ ℝ → 𝐶 ∈ ℂ) | |
10 | 9 | ad2antrl 726 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐶 ∈ ℂ) |
11 | gt0ne0 11486 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) | |
12 | 11 | adantl 483 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐶 ≠ 0) |
13 | 8, 10, 12 | divcan3d 11802 | . . . 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 5093 | . 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 205 ∧ wa 397 ∧ w3a 1087 = wceq 1539 ∈ wcel 2104 ≠ wne 2941 class class class wbr 5081 (class class class)co 7307 ℂcc 10915 ℝcr 10916 0cc0 10917 · cmul 10922 < clt 11055 / cdiv 11678 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 ax-pre-mulgt0 10994 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3285 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 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 4566 df-pr 4568 df-op 4572 df-uni 4845 df-br 5082 df-opab 5144 df-mpt 5165 df-id 5500 df-po 5514 df-so 5515 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-sub 11253 df-neg 11254 df-div 11679 |
This theorem is referenced by: ltdivmul2 11898 lt2mul2div 11899 ltrec 11903 supmul1 11990 avglt2 12258 3halfnz 12445 rpnnen1lem2 12763 rpnnen1lem1 12764 rpnnen1lem3 12765 rpnnen1lem5 12767 ltdivmuld 12869 qbtwnre 12979 modid 13662 expnbnd 13993 mertenslem1 15641 tanhlt1 15914 eirrlem 15958 fldivp1 16643 pcfaclem 16644 4sqlem12 16702 icopnfcnv 24150 ovolscalem1 24722 mbfmulc2lem 24856 itg2monolem3 24962 dveflem 25188 dvlt0 25214 ftc1lem4 25248 radcnvlem1 25617 tangtx 25707 cosne0 25730 cosordlem 25731 efif1olem4 25746 logcnlem4 25845 logf1o2 25850 atantan 26118 atanbndlem 26120 birthdaylem3 26148 basellem3 26277 ppiub 26397 bposlem1 26477 bposlem2 26478 bposlem6 26482 bposlem8 26484 gausslemma2dlem0c 26551 lgsquadlem1 26573 2sqlem8 26619 chebbnd1lem3 26664 chebbnd1 26665 ostth2lem2 26827 ex-fl 28856 nn0prpwlem 34556 ftc1cnnclem 35892 stoweidlem13 43603 logblt1b 45968 fldivexpfllog2 45969 |
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