| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > lemul12ad | GIF version | ||
| Description: Comparison of product of two nonnegative numbers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| ltp1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| divgt0d.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| lemul1ad.3 | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| ltmul12ad.3 | ⊢ (𝜑 → 𝐷 ∈ ℝ) |
| lemul12ad.4 | ⊢ (𝜑 → 0 ≤ 𝐴) |
| lemul12ad.5 | ⊢ (𝜑 → 0 ≤ 𝐶) |
| lemul12ad.6 | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| lemul12ad.7 | ⊢ (𝜑 → 𝐶 ≤ 𝐷) |
| Ref | Expression |
|---|---|
| lemul12ad | ⊢ (𝜑 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lemul12ad.6 | . 2 ⊢ (𝜑 → 𝐴 ≤ 𝐵) | |
| 2 | lemul12ad.7 | . 2 ⊢ (𝜑 → 𝐶 ≤ 𝐷) | |
| 3 | ltp1d.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 4 | lemul12ad.4 | . . . 4 ⊢ (𝜑 → 0 ≤ 𝐴) | |
| 5 | 3, 4 | jca 306 | . . 3 ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴)) |
| 6 | divgt0d.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 7 | lemul1ad.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 8 | lemul12ad.5 | . . . 4 ⊢ (𝜑 → 0 ≤ 𝐶) | |
| 9 | 7, 8 | jca 306 | . . 3 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ 0 ≤ 𝐶)) |
| 10 | ltmul12ad.3 | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
| 11 | lemul12a 8997 | . . 3 ⊢ ((((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ 𝐵 ∈ ℝ) ∧ ((𝐶 ∈ ℝ ∧ 0 ≤ 𝐶) ∧ 𝐷 ∈ ℝ)) → ((𝐴 ≤ 𝐵 ∧ 𝐶 ≤ 𝐷) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷))) | |
| 12 | 5, 6, 9, 10, 11 | syl22anc 1272 | . 2 ⊢ (𝜑 → ((𝐴 ≤ 𝐵 ∧ 𝐶 ≤ 𝐷) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷))) |
| 13 | 1, 2, 12 | mp2and 433 | 1 ⊢ (𝜑 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2200 class class class wbr 4082 (class class class)co 5994 ℝcr 7986 0cc0 7987 · cmul 7992 ≤ cle 8170 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4201 ax-pow 4257 ax-pr 4292 ax-un 4521 ax-setind 4626 ax-cnex 8078 ax-resscn 8079 ax-1cn 8080 ax-1re 8081 ax-icn 8082 ax-addcl 8083 ax-addrcl 8084 ax-mulcl 8085 ax-mulrcl 8086 ax-addcom 8087 ax-mulcom 8088 ax-addass 8089 ax-mulass 8090 ax-distr 8091 ax-i2m1 8092 ax-0lt1 8093 ax-1rid 8094 ax-0id 8095 ax-rnegex 8096 ax-precex 8097 ax-cnre 8098 ax-pre-ltirr 8099 ax-pre-ltwlin 8100 ax-pre-lttrn 8101 ax-pre-apti 8102 ax-pre-ltadd 8103 ax-pre-mulgt0 8104 ax-pre-mulext 8105 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-opab 4145 df-id 4381 df-po 4384 df-iso 4385 df-xp 4722 df-rel 4723 df-cnv 4724 df-co 4725 df-dm 4726 df-iota 5274 df-fun 5316 df-fv 5322 df-riota 5947 df-ov 5997 df-oprab 5998 df-mpo 5999 df-pnf 8171 df-mnf 8172 df-xr 8173 df-ltxr 8174 df-le 8175 df-sub 8307 df-neg 8308 df-reap 8710 df-ap 8717 |
| This theorem is referenced by: faclbnd 10950 fprodge1 12136 fprodle 12137 |
| Copyright terms: Public domain | W3C validator |