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Mirrors > Home > MPE Home > Th. List > flo1 | Structured version Visualization version GIF version |
Description: The floor function satisfies ⌊(𝑥) = 𝑥 + 𝑂(1). (Contributed by Mario Carneiro, 21-May-2016.) |
Ref | Expression |
---|---|
flo1 | ⊢ (𝑥 ∈ ℝ ↦ (𝑥 − (⌊‘𝑥))) ∈ 𝑂(1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssidd 3939 | . . 3 ⊢ (⊤ → ℝ ⊆ ℝ) | |
2 | reflcl 13396 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℝ) | |
3 | resubcl 11167 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ (⌊‘𝑥) ∈ ℝ) → (𝑥 − (⌊‘𝑥)) ∈ ℝ) | |
4 | 2, 3 | mpdan 687 | . . . . 5 ⊢ (𝑥 ∈ ℝ → (𝑥 − (⌊‘𝑥)) ∈ ℝ) |
5 | 4 | recnd 10886 | . . . 4 ⊢ (𝑥 ∈ ℝ → (𝑥 − (⌊‘𝑥)) ∈ ℂ) |
6 | 5 | adantl 485 | . . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ) → (𝑥 − (⌊‘𝑥)) ∈ ℂ) |
7 | 1red 10859 | . . 3 ⊢ (⊤ → 1 ∈ ℝ) | |
8 | id 22 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ) | |
9 | flle 13399 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ≤ 𝑥) | |
10 | 2, 8, 9 | abssubge0d 15023 | . . . . 5 ⊢ (𝑥 ∈ ℝ → (abs‘(𝑥 − (⌊‘𝑥))) = (𝑥 − (⌊‘𝑥))) |
11 | fracle1 13403 | . . . . 5 ⊢ (𝑥 ∈ ℝ → (𝑥 − (⌊‘𝑥)) ≤ 1) | |
12 | 10, 11 | eqbrtrd 5090 | . . . 4 ⊢ (𝑥 ∈ ℝ → (abs‘(𝑥 − (⌊‘𝑥))) ≤ 1) |
13 | 12 | ad2antrl 728 | . . 3 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ ∧ 1 ≤ 𝑥)) → (abs‘(𝑥 − (⌊‘𝑥))) ≤ 1) |
14 | 1, 6, 7, 7, 13 | elo1d 15125 | . 2 ⊢ (⊤ → (𝑥 ∈ ℝ ↦ (𝑥 − (⌊‘𝑥))) ∈ 𝑂(1)) |
15 | 14 | mptru 1550 | 1 ⊢ (𝑥 ∈ ℝ ↦ (𝑥 − (⌊‘𝑥))) ∈ 𝑂(1) |
Colors of variables: wff setvar class |
Syntax hints: ⊤wtru 1544 ∈ wcel 2111 class class class wbr 5068 ↦ cmpt 5150 ‘cfv 6398 (class class class)co 7232 ℂcc 10752 ℝcr 10753 1c1 10755 ≤ cle 10893 − cmin 11087 ⌊cfl 13390 abscabs 14825 𝑂(1)co1 15075 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2159 ax-12 2176 ax-ext 2709 ax-sep 5207 ax-nul 5214 ax-pow 5273 ax-pr 5337 ax-un 7542 ax-cnex 10810 ax-resscn 10811 ax-1cn 10812 ax-icn 10813 ax-addcl 10814 ax-addrcl 10815 ax-mulcl 10816 ax-mulrcl 10817 ax-mulcom 10818 ax-addass 10819 ax-mulass 10820 ax-distr 10821 ax-i2m1 10822 ax-1ne0 10823 ax-1rid 10824 ax-rnegex 10825 ax-rrecex 10826 ax-cnre 10827 ax-pre-lttri 10828 ax-pre-lttrn 10829 ax-pre-ltadd 10830 ax-pre-mulgt0 10831 ax-pre-sup 10832 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2072 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3067 df-rex 3068 df-reu 3069 df-rmo 3070 df-rab 3071 df-v 3423 df-sbc 3710 df-csb 3827 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4253 df-if 4455 df-pw 4530 df-sn 4557 df-pr 4559 df-tp 4561 df-op 4563 df-uni 4835 df-iun 4921 df-br 5069 df-opab 5131 df-mpt 5151 df-tr 5177 df-id 5470 df-eprel 5475 df-po 5483 df-so 5484 df-fr 5524 df-we 5526 df-xp 5572 df-rel 5573 df-cnv 5574 df-co 5575 df-dm 5576 df-rn 5577 df-res 5578 df-ima 5579 df-pred 6176 df-ord 6234 df-on 6235 df-lim 6236 df-suc 6237 df-iota 6356 df-fun 6400 df-fn 6401 df-f 6402 df-f1 6403 df-fo 6404 df-f1o 6405 df-fv 6406 df-riota 7189 df-ov 7235 df-oprab 7236 df-mpo 7237 df-om 7664 df-2nd 7781 df-wrecs 8068 df-recs 8129 df-rdg 8167 df-er 8412 df-pm 8532 df-en 8648 df-dom 8649 df-sdom 8650 df-sup 9083 df-inf 9084 df-pnf 10894 df-mnf 10895 df-xr 10896 df-ltxr 10897 df-le 10898 df-sub 11089 df-neg 11090 df-div 11515 df-nn 11856 df-2 11918 df-3 11919 df-n0 12116 df-z 12202 df-uz 12464 df-rp 12612 df-ico 12966 df-fl 13392 df-seq 13602 df-exp 13663 df-cj 14690 df-re 14691 df-im 14692 df-sqrt 14826 df-abs 14827 df-o1 15079 df-lo1 15080 |
This theorem is referenced by: (None) |
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