| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 12187 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐵 / 𝐶) < 𝐴 ↔ 𝐵 < (𝐴 · 𝐶))) | |
| 2 | 1 | 3com12 1141 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐵 / 𝐶) < 𝐴 ↔ 𝐵 < (𝐴 · 𝐶))) |
| 3 | 2 | notbid 321 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (¬ (𝐵 / 𝐶) < 𝐴 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 4 | simp1 1154 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → 𝐴 ∈ ℝ) | |
| 5 | gt0ne0 11774 | . . . . . . 7 ⊢ ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) | |
| 6 | 5 | 3adant1 1148 | . . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 0 < 𝐶) → 𝐶 ≠ 0) |
| 7 | redivcl 12029 | . . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 𝐶 ≠ 0) → (𝐵 / 𝐶) ∈ ℝ) | |
| 8 | 6, 7 | syld3an3 1436 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ 0 < 𝐶) → (𝐵 / 𝐶) ∈ ℝ) |
| 9 | 8 | 3expb 1138 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℝ) |
| 10 | 9 | 3adant1 1148 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℝ) |
| 11 | 4, 10 | lenltd 11449 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 ≤ (𝐵 / 𝐶) ↔ ¬ (𝐵 / 𝐶) < 𝐴)) |
| 12 | remulcl 11278 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 · 𝐶) ∈ ℝ) | |
| 13 | 12 | 3adant2 1149 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐴 · 𝐶) ∈ ℝ) |
| 14 | simp2 1155 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → 𝐵 ∈ ℝ) | |
| 15 | 13, 14 | lenltd 11449 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 16 | 15 | 3adant3r 1200 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ ¬ 𝐵 < (𝐴 · 𝐶))) |
| 17 | 3, 11, 16 | 3bitr4rd 315 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) ≤ 𝐵 ↔ 𝐴 ≤ (𝐵 / 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2145 ≠ wne 2956 class class class wbr 5103 (class class class)co 7418 ℝcr 11192 0cc0 11193 · cmul 11198 < clt 11336 ≤ cle 11337 / cdiv 11966 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 |
| This theorem is used by: lemuldiv2 12191 lemuldivd 13206 hashdvds 16945 nmoleub2lem3 25429 mbfi1fseqlem4 26032 mbfi1fseqlem5 26033 radcnvlem1 26733 pige3ALT 26841 fsumfldivdiaglem 27509 bposlem2 27605 bposlem3 27606 bposlem4 27607 bposlem7 27610 gausslemma2dlem1a 27685 lgsquadlem1 27700 lgsquadlem2 27701 chebbnd1lem2 27790 chebbnd1lem3 27791 dchrisum0flblem1 27828 mulog2sumlem2 27855 pntibndlem3 27912 lemuldiv3d 45155 lemuldiv4d 45156 2ltceilhalf 48371 lighneallem4a 48662 divge1b 49593 |
| Copyright terms: Public domain | W3C validator |