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| Mirrors > Home > ILE Home > Th. List > lediv12ad | GIF version | ||
| Description: Comparison of ratio of two nonnegative numbers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| ltmul1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| ltmul1d.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| ltmul1d.3 | ⊢ (𝜑 → 𝐶 ∈ ℝ+) |
| lediv12ad.4 | ⊢ (𝜑 → 𝐷 ∈ ℝ) |
| lediv12ad.5 | ⊢ (𝜑 → 0 ≤ 𝐴) |
| lediv12ad.6 | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| lediv12ad.7 | ⊢ (𝜑 → 𝐶 ≤ 𝐷) |
| Ref | Expression |
|---|---|
| lediv12ad | ⊢ (𝜑 → (𝐴 / 𝐷) ≤ (𝐵 / 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltmul1d.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | ltmul1d.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | 1, 2 | jca 306 | . 2 ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ)) |
| 4 | lediv12ad.5 | . . 3 ⊢ (𝜑 → 0 ≤ 𝐴) | |
| 5 | lediv12ad.6 | . . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐵) | |
| 6 | 4, 5 | jca 306 | . 2 ⊢ (𝜑 → (0 ≤ 𝐴 ∧ 𝐴 ≤ 𝐵)) |
| 7 | ltmul1d.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ+) | |
| 8 | 7 | rpred 9931 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 9 | lediv12ad.4 | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
| 10 | 8, 9 | jca 306 | . 2 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ)) |
| 11 | 7 | rpgt0d 9934 | . . 3 ⊢ (𝜑 → 0 < 𝐶) |
| 12 | lediv12ad.7 | . . 3 ⊢ (𝜑 → 𝐶 ≤ 𝐷) | |
| 13 | 11, 12 | jca 306 | . 2 ⊢ (𝜑 → (0 < 𝐶 ∧ 𝐶 ≤ 𝐷)) |
| 14 | lediv12a 9074 | . 2 ⊢ ((((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐴 ≤ 𝐵)) ∧ ((𝐶 ∈ ℝ ∧ 𝐷 ∈ ℝ) ∧ (0 < 𝐶 ∧ 𝐶 ≤ 𝐷))) → (𝐴 / 𝐷) ≤ (𝐵 / 𝐶)) | |
| 15 | 3, 6, 10, 13, 14 | syl22anc 1274 | 1 ⊢ (𝜑 → (𝐴 / 𝐷) ≤ (𝐵 / 𝐶)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2202 class class class wbr 4088 (class class class)co 6018 ℝcr 8031 0cc0 8032 < clt 8214 ≤ cle 8215 / cdiv 8852 ℝ+crp 9888 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-mulrcl 8131 ax-addcom 8132 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-i2m1 8137 ax-0lt1 8138 ax-1rid 8139 ax-0id 8140 ax-rnegex 8141 ax-precex 8142 ax-cnre 8143 ax-pre-ltirr 8144 ax-pre-ltwlin 8145 ax-pre-lttrn 8146 ax-pre-apti 8147 ax-pre-ltadd 8148 ax-pre-mulgt0 8149 ax-pre-mulext 8150 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-po 4393 df-iso 4394 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-sub 8352 df-neg 8353 df-reap 8755 df-ap 8762 df-div 8853 df-rp 9889 |
| This theorem is referenced by: (None) |
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