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| Mirrors > Home > MPE Home > Th. List > lemuldiv | Structured version Visualization version GIF version | ||
| Description: 'Less than or equal' relationship between division and multiplication. (Contributed by NM, 10-Mar-2006.) |
| Ref | Expression |
|---|---|
| lemuldiv | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ 𝐴 ≤ (𝐵 / 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltdivmul2 12008 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐵 / 𝐶) < 𝐴 ↔ 𝐵 < (𝐴 · 𝐶))) | |
| 2 | 1 | 3com12 1123 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐵 / 𝐶) < 𝐴 ↔ 𝐵 < (𝐴 · 𝐶))) |
| 3 | 2 | notbid 318 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (¬ (𝐵 / 𝐶) < 𝐴 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 4 | simp1 1136 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐴 ∈ ℝ) | |
| 5 | gt0ne0 11591 | . . . . . . 7 ⊢ ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) | |
| 6 | 5 | 3adant1 1130 | . . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) |
| 7 | redivcl 11849 | . . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 𝐶 ≠ 0) → (𝐵 / 𝐶) ∈ ℝ) | |
| 8 | 6, 7 | syld3an3 1411 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 0 < 𝐶) → (𝐵 / 𝐶) ∈ ℝ) |
| 9 | 8 | 3expb 1120 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℝ) |
| 10 | 9 | 3adant1 1130 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℝ) |
| 11 | 4, 10 | lenltd 11268 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 ≤ (𝐵 / 𝐶) ↔ ¬ (𝐵 / 𝐶) < 𝐴)) |
| 12 | remulcl 11100 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 · 𝐶) ∈ ℝ) | |
| 13 | 12 | 3adant2 1131 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 · 𝐶) ∈ ℝ) |
| 14 | simp2 1137 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → 𝐵 ∈ ℝ) | |
| 15 | 13, 14 | lenltd 11268 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 16 | 15 | 3adant3r 1182 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 17 | 3, 11, 16 | 3bitr4rd 312 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ 𝐴 ≤ (𝐵 / 𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 ∈ wcel 2113 ≠ wne 2929 class class class wbr 5095 (class class class)co 7354 ℝcr 11014 0cc0 11015 · cmul 11020 < clt 11155 ≤ cle 11156 / cdiv 11783 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-po 5529 df-so 5530 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-er 8630 df-en 8878 df-dom 8879 df-sdom 8880 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-div 11784 |
| This theorem is referenced by: lemuldiv2 12012 lemuldivd 12987 hashdvds 16690 nmoleub2lem3 25045 mbfi1fseqlem4 25649 mbfi1fseqlem5 25650 radcnvlem1 26352 pige3ALT 26459 fsumfldivdiaglem 27129 bposlem2 27226 bposlem3 27227 bposlem4 27228 bposlem7 27231 gausslemma2dlem1a 27306 lgsquadlem1 27321 lgsquadlem2 27322 chebbnd1lem2 27411 chebbnd1lem3 27412 dchrisum0flblem1 27449 mulog2sumlem2 27476 pntibndlem3 27533 lemuldiv3d 44290 lemuldiv4d 44291 2ltceilhalf 47455 lighneallem4a 47735 divge1b 48640 |
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