Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > o1mul | Structured version Visualization version GIF version |
Description: The product of two eventually bounded functions is eventually bounded. (Contributed by Mario Carneiro, 15-Sep-2014.) (Proof shortened by Fan Zheng, 14-Jul-2016.) |
Ref | Expression |
---|---|
o1mul | ⊢ ((𝐹 ∈ 𝑂(1) ∧ 𝐺 ∈ 𝑂(1)) → (𝐹 ∘f · 𝐺) ∈ 𝑂(1)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | remulcl 10624 | . 2 ⊢ ((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) → (𝑚 · 𝑛) ∈ ℝ) | |
2 | mulcl 10623 | . 2 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 · 𝑦) ∈ ℂ) | |
3 | simp2l 1195 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 𝑥 ∈ ℂ) | |
4 | simp2r 1196 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 𝑦 ∈ ℂ) | |
5 | 3, 4 | absmuld 14816 | . . . 4 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘(𝑥 · 𝑦)) = ((abs‘𝑥) · (abs‘𝑦))) |
6 | 3 | abscld 14798 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘𝑥) ∈ ℝ) |
7 | simp1l 1193 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 𝑚 ∈ ℝ) | |
8 | 4 | abscld 14798 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘𝑦) ∈ ℝ) |
9 | simp1r 1194 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 𝑛 ∈ ℝ) | |
10 | 3 | absge0d 14806 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 0 ≤ (abs‘𝑥)) |
11 | 4 | absge0d 14806 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → 0 ≤ (abs‘𝑦)) |
12 | simp3l 1197 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘𝑥) ≤ 𝑚) | |
13 | simp3r 1198 | . . . . 5 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘𝑦) ≤ 𝑛) | |
14 | 6, 7, 8, 9, 10, 11, 12, 13 | lemul12ad 11584 | . . . 4 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → ((abs‘𝑥) · (abs‘𝑦)) ≤ (𝑚 · 𝑛)) |
15 | 5, 14 | eqbrtrd 5090 | . . 3 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) ∧ ((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛)) → (abs‘(𝑥 · 𝑦)) ≤ (𝑚 · 𝑛)) |
16 | 15 | 3expia 1117 | . 2 ⊢ (((𝑚 ∈ ℝ ∧ 𝑛 ∈ ℝ) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ)) → (((abs‘𝑥) ≤ 𝑚 ∧ (abs‘𝑦) ≤ 𝑛) → (abs‘(𝑥 · 𝑦)) ≤ (𝑚 · 𝑛))) |
17 | 1, 2, 16 | o1of2 14971 | 1 ⊢ ((𝐹 ∈ 𝑂(1) ∧ 𝐺 ∈ 𝑂(1)) → (𝐹 ∘f · 𝐺) ∈ 𝑂(1)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∧ w3a 1083 ∈ wcel 2114 class class class wbr 5068 ‘cfv 6357 (class class class)co 7158 ∘f cof 7409 ℂcc 10537 ℝcr 10538 · cmul 10544 ≤ cle 10678 abscabs 14595 𝑂(1)co1 14845 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-of 7411 df-om 7583 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-pm 8411 df-en 8512 df-dom 8513 df-sdom 8514 df-sup 8908 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-n0 11901 df-z 11985 df-uz 12247 df-rp 12393 df-ico 12747 df-seq 13373 df-exp 13433 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-o1 14849 |
This theorem is referenced by: o1mul2 14983 chebbnd2 26055 chto1lb 26056 chpo1ub 26058 selberg2lem 26128 |
Copyright terms: Public domain | W3C validator |