| Mathbox for Stanislas Polu |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > lemuldiv4d | Structured version Visualization version GIF version | ||
| Description: 'Less than or equal to' relationship between division and multiplication. (Contributed by Stanislas Polu, 9-Mar-2020.) |
| Ref | Expression |
|---|---|
| lemuldiv4d.1 | ⊢ (𝜑 → 𝐵 ≤ (𝐶 / 𝐴)) |
| lemuldiv4d.2 | ⊢ (𝜑 → 0 < 𝐴) |
| lemuldiv4d.3 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| lemuldiv4d.4 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| lemuldiv4d.5 | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| Ref | Expression |
|---|---|
| lemuldiv4d | ⊢ (𝜑 → (𝐵 · 𝐴) ≤ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lemuldiv4d.1 | . 2 ⊢ (𝜑 → 𝐵 ≤ (𝐶 / 𝐴)) | |
| 2 | lemuldiv4d.4 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | lemuldiv4d.5 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 4 | lemuldiv4d.3 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 5 | lemuldiv4d.2 | . . . 4 ⊢ (𝜑 → 0 < 𝐴) | |
| 6 | lemuldiv 12166 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ (𝐴 ∈ ℝ ∧ 0 < 𝐴)) → ((𝐵 · 𝐴) ≤ 𝐶 ↔ 𝐵 ≤ (𝐶 / 𝐴))) | |
| 7 | 2, 3, 4, 5, 6 | syl112anc 1401 | . . 3 ⊢ (𝜑 → ((𝐵 · 𝐴) ≤ 𝐶 ↔ 𝐵 ≤ (𝐶 / 𝐴))) |
| 8 | 7 | bicomd 226 | . 2 ⊢ (𝜑 → (𝐵 ≤ (𝐶 / 𝐴) ↔ (𝐵 · 𝐴) ≤ 𝐶)) |
| 9 | 1, 8 | mpbid 235 | 1 ⊢ (𝜑 → (𝐵 · 𝐴) ≤ 𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2145 class class class wbr 5102 (class class class)co 7408 ℝcr 11170 0cc0 11171 · cmul 11176 < clt 11314 ≤ cle 11315 / cdiv 11942 |
| 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 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 ax-pre-mulgt0 11248 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5542 df-po 5555 df-so 5556 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-div 11943 |
| This theorem is used by: imo72b2 45116 |
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