chto1lb - Metamath Proof Explorer

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Theorem chto1lb 27217

Description: The θ function is lower bounded by a linear term. Corollary of chebbnd1 27211. (Contributed by Mario Carneiro, 8-Apr-2016.)

**Assertion**
Ref	Expression
chto1lb	⊢ (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / (θ‘𝑥))) ∈ 𝑂(1)

**Proof of Theorem chto1lb**
Step	Hyp	Ref	Expression
1		ovexd 7446	. . . . 5 ⊢ (⊤ → (2[,)+∞) ∈ V)
2		2re 12290	. . . . . . . . . . . 12 ⊢ 2 ∈ ℝ
3		elicopnf 13426	. . . . . . . . . . . 12 ⊢ (2 ∈ ℝ → (𝑥 ∈ (2[,)+∞) ↔ (𝑥 ∈ ℝ ∧ 2 ≤ 𝑥)))
4	2, 3	ax-mp 5	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (2[,)+∞) ↔ (𝑥 ∈ ℝ ∧ 2 ≤ 𝑥))
5	4	biimpi 215	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → (𝑥 ∈ ℝ ∧ 2 ≤ 𝑥))
6	5	simpld 493	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → 𝑥 ∈ ℝ)
7		0red 11221	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → 0 ∈ ℝ)
8	2	a1i 11	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → 2 ∈ ℝ)
9		2pos 12319	. . . . . . . . . . 11 ⊢ 0 < 2
10	9	a1i 11	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → 0 < 2)
11	5	simprd 494	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → 2 ≤ 𝑥)
12	7, 8, 6, 10, 11	ltletrd 11378	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → 0 < 𝑥)
13	6, 12	elrpd 13017	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → 𝑥 ∈ ℝ⁺)
14		ppinncl 26914	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℝ ∧ 2 ≤ 𝑥) → (π‘𝑥) ∈ ℕ)
15	14	nnrpd 13018	. . . . . . . . . 10 ⊢ ((𝑥 ∈ ℝ ∧ 2 ≤ 𝑥) → (π‘𝑥) ∈ ℝ⁺)
16	5, 15	syl 17	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (π‘𝑥) ∈ ℝ⁺)
17		1red 11219	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (2[,)+∞) → 1 ∈ ℝ)
18		1lt2 12387	. . . . . . . . . . . 12 ⊢ 1 < 2
19	18	a1i 11	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (2[,)+∞) → 1 < 2)
20	17, 8, 6, 19, 11	ltletrd 11378	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2[,)+∞) → 1 < 𝑥)
21	6, 20	rplogcld 26373	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (log‘𝑥) ∈ ℝ⁺)
22	16, 21	rpmulcld 13036	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → ((π‘𝑥) · (log‘𝑥)) ∈ ℝ⁺)
23	13, 22	rpdivcld 13037	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) → (𝑥 / ((π‘𝑥) · (log‘𝑥))) ∈ ℝ⁺)
24	23	rpcnd 13022	. . . . . 6 ⊢ (𝑥 ∈ (2[,)+∞) → (𝑥 / ((π‘𝑥) · (log‘𝑥))) ∈ ℂ)
25	24	adantl 480	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → (𝑥 / ((π‘𝑥) · (log‘𝑥))) ∈ ℂ)
26		chtrpcl 26915	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 2 ≤ 𝑥) → (θ‘𝑥) ∈ ℝ⁺)
27	5, 26	syl 17	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → (θ‘𝑥) ∈ ℝ⁺)
28	22, 27	rpdivcld 13037	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) → (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)) ∈ ℝ⁺)
29	28	rpcnd 13022	. . . . . 6 ⊢ (𝑥 ∈ (2[,)+∞) → (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)) ∈ ℂ)
30	29	adantl 480	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)) ∈ ℂ)
31	6	recnd 11246	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → 𝑥 ∈ ℂ)
32	21	rpcnd 13022	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (log‘𝑥) ∈ ℂ)
33	16	rpcnd 13022	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (π‘𝑥) ∈ ℂ)
34	21	rpne0d 13025	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (log‘𝑥) ≠ 0)
35	16	rpne0d 13025	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → (π‘𝑥) ≠ 0)
36	31, 32, 33, 34, 35	divdiv1d 12025	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → ((𝑥 / (log‘𝑥)) / (π‘𝑥)) = (𝑥 / ((log‘𝑥) · (π‘𝑥))))
37	32, 33	mulcomd 11239	. . . . . . . . 9 ⊢ (𝑥 ∈ (2[,)+∞) → ((log‘𝑥) · (π‘𝑥)) = ((π‘𝑥) · (log‘𝑥)))
38	37	oveq2d 7427	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → (𝑥 / ((log‘𝑥) · (π‘𝑥))) = (𝑥 / ((π‘𝑥) · (log‘𝑥))))
39	36, 38	eqtrd 2770	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) → ((𝑥 / (log‘𝑥)) / (π‘𝑥)) = (𝑥 / ((π‘𝑥) · (log‘𝑥))))
40	39	mpteq2ia 5250	. . . . . 6 ⊢ (𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) = (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / ((π‘𝑥) · (log‘𝑥))))
41	40	a1i 11	. . . . 5 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) = (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / ((π‘𝑥) · (log‘𝑥)))))
42	27	rpcnd 13022	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → (θ‘𝑥) ∈ ℂ)
43	22	rpcnd 13022	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → ((π‘𝑥) · (log‘𝑥)) ∈ ℂ)
44	27	rpne0d 13025	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → (θ‘𝑥) ≠ 0)
45	22	rpne0d 13025	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → ((π‘𝑥) · (log‘𝑥)) ≠ 0)
46	42, 43, 44, 45	recdivd 12011	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) → (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) = (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)))
47	46	mpteq2ia 5250	. . . . . 6 ⊢ (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) = (𝑥 ∈ (2[,)+∞) ↦ (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)))
48	47	a1i 11	. . . . 5 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) = (𝑥 ∈ (2[,)+∞) ↦ (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))))
49	1, 25, 30, 41, 48	offval2 7692	. . . 4 ⊢ (⊤ → ((𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∘_f · (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))))) = (𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / ((π‘𝑥) · (log‘𝑥))) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)))))
50	31, 43, 42, 45, 44	dmdcan2d 12024	. . . . 5 ⊢ (𝑥 ∈ (2[,)+∞) → ((𝑥 / ((π‘𝑥) · (log‘𝑥))) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))) = (𝑥 / (θ‘𝑥)))
51	50	mpteq2ia 5250	. . . 4 ⊢ (𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / ((π‘𝑥) · (log‘𝑥))) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)))) = (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / (θ‘𝑥)))
52	49, 51	eqtrdi 2786	. . 3 ⊢ (⊤ → ((𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∘_f · (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))))) = (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / (θ‘𝑥))))
53		chebbnd1 27211	. . . 4 ⊢ (𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∈ 𝑂(1)
54		ax-1cn 11170	. . . . . . 7 ⊢ 1 ∈ ℂ
55	54	a1i 11	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → 1 ∈ ℂ)
56	27, 22	rpdivcld 13037	. . . . . . . 8 ⊢ (𝑥 ∈ (2[,)+∞) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ∈ ℝ⁺)
57	56	adantl 480	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ∈ ℝ⁺)
58	57	rpcnd 13022	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ∈ ℂ)
59	6	ssriv 3985	. . . . . . . 8 ⊢ (2[,)+∞) ⊆ ℝ
60		rlimconst 15492	. . . . . . . 8 ⊢ (((2[,)+∞) ⊆ ℝ ∧ 1 ∈ ℂ) → (𝑥 ∈ (2[,)+∞) ↦ 1) ⇝_𝑟 1)
61	59, 54, 60	mp2an 688	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) ↦ 1) ⇝_𝑟 1
62	61	a1i 11	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ 1) ⇝_𝑟 1)
63		chtppilim 27214	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) ↦ ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) ⇝_𝑟 1
64	63	a1i 11	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) ⇝_𝑟 1)
65		ax-1ne0 11181	. . . . . . 7 ⊢ 1 ≠ 0
66	65	a1i 11	. . . . . 6 ⊢ (⊤ → 1 ≠ 0)
67	56	rpne0d 13025	. . . . . . 7 ⊢ (𝑥 ∈ (2[,)+∞) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ≠ 0)
68	67	adantl 480	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ≠ 0)
69	55, 58, 62, 64, 66, 68	rlimdiv 15596	. . . . 5 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ⇝_𝑟 (1 / 1))
70		rlimo1 15565	. . . . 5 ⊢ ((𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ⇝_𝑟 (1 / 1) → (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ∈ 𝑂(1))
71	69, 70	syl 17	. . . 4 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ∈ 𝑂(1))
72		o1mul 15563	. . . 4 ⊢ (((𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∈ 𝑂(1) ∧ (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ∈ 𝑂(1)) → ((𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∘_f · (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))))) ∈ 𝑂(1))
73	53, 71, 72	sylancr 585	. . 3 ⊢ (⊤ → ((𝑥 ∈ (2[,)+∞) ↦ ((𝑥 / (log‘𝑥)) / (π‘𝑥))) ∘_f · (𝑥 ∈ (2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))))) ∈ 𝑂(1))
74	52, 73	eqeltrrd 2832	. 2 ⊢ (⊤ → (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / (θ‘𝑥))) ∈ 𝑂(1))
75	74	mptru 1546	1 ⊢ (𝑥 ∈ (2[,)+∞) ↦ (𝑥 / (θ‘𝑥))) ∈ 𝑂(1)

Colors of variables: wff setvar class

Syntax hints: ↔ wb 205 ∧ wa 394 = wceq 1539 ⊤wtru 1540 ∈ wcel 2104 ≠ wne 2938 Vcvv 3472 ⊆ wss 3947 class class class wbr 5147 ↦ cmpt 5230 ‘cfv 6542 (class class class)co 7411 ∘_f cof 7670 ℂcc 11110 ℝcr 11111 0cc0 11112 1c1 11113 · cmul 11117 +∞cpnf 11249 < clt 11252 ≤ cle 11253 / cdiv 11875 2c2 12271 ℝ⁺crp 12978 [,)cico 13330 ⇝_𝑟 crli 15433 𝑂(1)co1 15434 logclog 26299 θccht 26831 πcppi 26834

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-oadd 8472 df-er 8705 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-xnn0 12549 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12979 df-xneg 13096 df-xadd 13097 df-xmul 13098 df-ioo 13332 df-ioc 13333 df-ico 13334 df-icc 13335 df-fz 13489 df-fzo 13632 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-fac 14238 df-bc 14267 df-hash 14295 df-shft 15018 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-limsup 15419 df-clim 15436 df-rlim 15437 df-o1 15438 df-lo1 15439 df-sum 15637 df-ef 16015 df-e 16016 df-sin 16017 df-cos 16018 df-pi 16020 df-dvds 16202 df-gcd 16440 df-prm 16613 df-pc 16774 df-struct 17084 df-sets 17101 df-slot 17119 df-ndx 17131 df-base 17149 df-ress 17178 df-plusg 17214 df-mulr 17215 df-starv 17216 df-sca 17217 df-vsca 17218 df-ip 17219 df-tset 17220 df-ple 17221 df-ds 17223 df-unif 17224 df-hom 17225 df-cco 17226 df-rest 17372 df-topn 17373 df-0g 17391 df-gsum 17392 df-topgen 17393 df-pt 17394 df-prds 17397 df-xrs 17452 df-qtop 17457 df-imas 17458 df-xps 17460 df-mre 17534 df-mrc 17535 df-acs 17537 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18706 df-mulg 18987 df-cntz 19222 df-cmn 19691 df-psmet 21136 df-xmet 21137 df-met 21138 df-bl 21139 df-mopn 21140 df-fbas 21141 df-fg 21142 df-cnfld 21145 df-top 22616 df-topon 22633 df-topsp 22655 df-bases 22669 df-cld 22743 df-ntr 22744 df-cls 22745 df-nei 22822 df-lp 22860 df-perf 22861 df-cn 22951 df-cnp 22952 df-haus 23039 df-tx 23286 df-hmeo 23479 df-fil 23570 df-fm 23662 df-flim 23663 df-flf 23664 df-xms 24046 df-ms 24047 df-tms 24048 df-cncf 24618 df-limc 25615 df-dv 25616 df-log 26301 df-cxp 26302 df-cht 26837 df-ppi 26840

This theorem is referenced by: chpchtlim 27218

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