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Mirrors > Home > MPE Home > Th. List > lemul12bd | Structured version Visualization version 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) |
lemul12bd.4 | ⊢ (𝜑 → 0 ≤ 𝐴) |
lemul12bd.5 | ⊢ (𝜑 → 0 ≤ 𝐷) |
lemul12bd.6 | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
lemul12bd.7 | ⊢ (𝜑 → 𝐶 ≤ 𝐷) |
Ref | Expression |
---|---|
lemul12bd | ⊢ (𝜑 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lemul12bd.6 | . 2 ⊢ (𝜑 → 𝐴 ≤ 𝐵) | |
2 | lemul12bd.7 | . 2 ⊢ (𝜑 → 𝐶 ≤ 𝐷) | |
3 | ltp1d.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
4 | lemul12bd.4 | . . . 4 ⊢ (𝜑 → 0 ≤ 𝐴) | |
5 | 3, 4 | jca 512 | . . 3 ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 0 ≤ 𝐴)) |
6 | divgt0d.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
7 | lemul1ad.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
8 | ltmul12ad.3 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ ℝ) | |
9 | lemul12bd.5 | . . . 4 ⊢ (𝜑 → 0 ≤ 𝐷) | |
10 | 8, 9 | jca 512 | . . 3 ⊢ (𝜑 → (𝐷 ∈ ℝ ∧ 0 ≤ 𝐷)) |
11 | lemul12b 11350 | . . 3 ⊢ ((((𝐴 ∈ ℝ ∧ 0 ≤ 𝐴) ∧ 𝐵 ∈ ℝ) ∧ (𝐶 ∈ ℝ ∧ (𝐷 ∈ ℝ ∧ 0 ≤ 𝐷))) → ((𝐴 ≤ 𝐵 ∧ 𝐶 ≤ 𝐷) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷))) | |
12 | 5, 6, 7, 10, 11 | syl22anc 835 | . 2 ⊢ (𝜑 → ((𝐴 ≤ 𝐵 ∧ 𝐶 ≤ 𝐷) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷))) |
13 | 1, 2, 12 | mp2and 695 | 1 ⊢ (𝜑 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2081 class class class wbr 4966 (class class class)co 7021 ℝcr 10387 0cc0 10388 · cmul 10393 ≤ cle 10527 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1777 ax-4 1791 ax-5 1888 ax-6 1947 ax-7 1992 ax-8 2083 ax-9 2091 ax-10 2112 ax-11 2126 ax-12 2141 ax-13 2344 ax-ext 2769 ax-sep 5099 ax-nul 5106 ax-pow 5162 ax-pr 5226 ax-un 7324 ax-resscn 10445 ax-1cn 10446 ax-icn 10447 ax-addcl 10448 ax-addrcl 10449 ax-mulcl 10450 ax-mulrcl 10451 ax-mulcom 10452 ax-addass 10453 ax-mulass 10454 ax-distr 10455 ax-i2m1 10456 ax-1ne0 10457 ax-1rid 10458 ax-rnegex 10459 ax-rrecex 10460 ax-cnre 10461 ax-pre-lttri 10462 ax-pre-lttrn 10463 ax-pre-ltadd 10464 ax-pre-mulgt0 10465 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 843 df-3or 1081 df-3an 1082 df-tru 1525 df-ex 1762 df-nf 1766 df-sb 2043 df-mo 2576 df-eu 2612 df-clab 2776 df-cleq 2788 df-clel 2863 df-nfc 2935 df-ne 2985 df-nel 3091 df-ral 3110 df-rex 3111 df-reu 3112 df-rab 3114 df-v 3439 df-sbc 3710 df-csb 3816 df-dif 3866 df-un 3868 df-in 3870 df-ss 3878 df-nul 4216 df-if 4386 df-pw 4459 df-sn 4477 df-pr 4479 df-op 4483 df-uni 4750 df-br 4967 df-opab 5029 df-mpt 5046 df-id 5353 df-po 5367 df-so 5368 df-xp 5454 df-rel 5455 df-cnv 5456 df-co 5457 df-dm 5458 df-rn 5459 df-res 5460 df-ima 5461 df-iota 6194 df-fun 6232 df-fn 6233 df-f 6234 df-f1 6235 df-fo 6236 df-f1o 6237 df-fv 6238 df-riota 6982 df-ov 7024 df-oprab 7025 df-mpo 7026 df-er 8144 df-en 8363 df-dom 8364 df-sdom 8365 df-pnf 10528 df-mnf 10529 df-xr 10530 df-ltxr 10531 df-le 10532 df-sub 10724 df-neg 10725 |
This theorem is referenced by: expmulnbnd 13451 fourierdlem77 42037 |
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