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Mirrors > Home > MPE Home > Th. List > lemul1a | Structured version Visualization version GIF version |
Description: Multiplication of both sides of 'less than or equal to' by a nonnegative number. (Contributed by NM, 21-Feb-2005.) |
Ref | Expression |
---|---|
lemul1a | ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 ≤ 𝐶)) ∧ 𝐴 ≤ 𝐵) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0re 10721 | . . . . . . 7 ⊢ 0 ∈ ℝ | |
2 | leloe 10805 | . . . . . . 7 ⊢ ((0 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (0 ≤ 𝐶 ↔ (0 < 𝐶 ∨ 0 = 𝐶))) | |
3 | 1, 2 | mpan 690 | . . . . . 6 ⊢ (𝐶 ∈ ℝ → (0 ≤ 𝐶 ↔ (0 < 𝐶 ∨ 0 = 𝐶))) |
4 | 3 | pm5.32i 578 | . . . . 5 ⊢ ((𝐶 ∈ ℝ ∧ 0 ≤ 𝐶) ↔ (𝐶 ∈ ℝ ∧ (0 < 𝐶 ∨ 0 = 𝐶))) |
5 | lemul1 11570 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 ≤ 𝐵 ↔ (𝐴 · 𝐶) ≤ (𝐵 · 𝐶))) | |
6 | 5 | biimpd 232 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 < 𝐶)) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶))) |
7 | 6 | 3expia 1122 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
8 | 7 | com12 32 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 0 < 𝐶) → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
9 | 1 | leidi 11252 | . . . . . . . . . 10 ⊢ 0 ≤ 0 |
10 | recn 10705 | . . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
11 | 10 | mul01d 10917 | . . . . . . . . . . 11 ⊢ (𝐴 ∈ ℝ → (𝐴 · 0) = 0) |
12 | recn 10705 | . . . . . . . . . . . 12 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
13 | 12 | mul01d 10917 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ ℝ → (𝐵 · 0) = 0) |
14 | 11, 13 | breqan12d 5046 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 · 0) ≤ (𝐵 · 0) ↔ 0 ≤ 0)) |
15 | 9, 14 | mpbiri 261 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 · 0) ≤ (𝐵 · 0)) |
16 | oveq2 7178 | . . . . . . . . . 10 ⊢ (0 = 𝐶 → (𝐴 · 0) = (𝐴 · 𝐶)) | |
17 | oveq2 7178 | . . . . . . . . . 10 ⊢ (0 = 𝐶 → (𝐵 · 0) = (𝐵 · 𝐶)) | |
18 | 16, 17 | breq12d 5043 | . . . . . . . . 9 ⊢ (0 = 𝐶 → ((𝐴 · 0) ≤ (𝐵 · 0) ↔ (𝐴 · 𝐶) ≤ (𝐵 · 𝐶))) |
19 | 15, 18 | syl5ib 247 | . . . . . . . 8 ⊢ (0 = 𝐶 → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶))) |
20 | 19 | a1dd 50 | . . . . . . 7 ⊢ (0 = 𝐶 → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
21 | 20 | adantl 485 | . . . . . 6 ⊢ ((𝐶 ∈ ℝ ∧ 0 = 𝐶) → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
22 | 8, 21 | jaodan 957 | . . . . 5 ⊢ ((𝐶 ∈ ℝ ∧ (0 < 𝐶 ∨ 0 = 𝐶)) → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
23 | 4, 22 | sylbi 220 | . . . 4 ⊢ ((𝐶 ∈ ℝ ∧ 0 ≤ 𝐶) → ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
24 | 23 | com12 32 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐶 ∈ ℝ ∧ 0 ≤ 𝐶) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)))) |
25 | 24 | 3impia 1118 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 ≤ 𝐶)) → (𝐴 ≤ 𝐵 → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶))) |
26 | 25 | imp 410 | 1 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℝ ∧ 0 ≤ 𝐶)) ∧ 𝐴 ≤ 𝐵) → (𝐴 · 𝐶) ≤ (𝐵 · 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2114 class class class wbr 5030 (class class class)co 7170 ℝcr 10614 0cc0 10615 · cmul 10620 < clt 10753 ≤ cle 10754 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-op 4523 df-uni 4797 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5429 df-po 5442 df-so 5443 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-er 8320 df-en 8556 df-dom 8557 df-sdom 8558 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 |
This theorem is referenced by: lemul2a 11573 ltmul12a 11574 lemul12b 11575 lt2msq1 11602 lemul1ad 11657 faclbnd4lem1 13745 facavg 13753 mulcn2 15043 o1fsum 15261 eftlub 15554 bddmulibl 24591 cxpaddlelem 25492 dchrmusum2 26230 axcontlem7 26916 nmoub3i 28708 siilem1 28786 ubthlem3 28807 bcs2 29117 cnlnadjlem2 30003 leopnmid 30073 eulerpartlemgc 31899 rrntotbnd 35617 jm2.17a 40354 |
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