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Theorem logfacrlim 26277

Description: Combine the estimates logfacubnd 26274 and logfaclbnd 26275, to get log(𝑥!) = 𝑥log𝑥 + 𝑂(𝑥). Equation 9.2.9 of [Shapiro], p. 329. This is a weak form of the even stronger statement, log(𝑥!) = 𝑥log𝑥 − 𝑥 + 𝑂(log𝑥). (Contributed by Mario Carneiro, 16-Apr-2016.) (Revised by Mario Carneiro, 21-May-2016.)

**Assertion**
Ref	Expression
logfacrlim	⊢ (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥))) ⇝_𝑟 1

**Proof of Theorem logfacrlim**
Step	Hyp	Ref	Expression
1		1red 10907	. . 3 ⊢ (⊤ → 1 ∈ ℝ)
2		1cnd 10901	. . 3 ⊢ (⊤ → 1 ∈ ℂ)
3		relogcl 25636	. . . . . . . . 9 ⊢ (𝑥 ∈ ℝ⁺ → (log‘𝑥) ∈ ℝ)
4	3	adantl 481	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℝ)
5	4	recnd 10934	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℂ)
6		1cnd 10901	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 1 ∈ ℂ)
7		rpcnne0 12677	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
8	7	adantl 481	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
9		divdir 11588	. . . . . . 7 ⊢ (((log‘𝑥) ∈ ℂ ∧ 1 ∈ ℂ ∧ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) → (((log‘𝑥) + 1) / 𝑥) = (((log‘𝑥) / 𝑥) + (1 / 𝑥)))
10	5, 6, 8, 9	syl3anc 1369	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) = (((log‘𝑥) / 𝑥) + (1 / 𝑥)))
11	10	mpteq2dva 5170	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) = (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) / 𝑥) + (1 / 𝑥))))
12		simpr 484	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 𝑥 ∈ ℝ⁺)
13	4, 12	rerpdivcld 12732	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / 𝑥) ∈ ℝ)
14		rpreccl 12685	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (1 / 𝑥) ∈ ℝ⁺)
15	14	adantl 481	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ⁺)
16	15	rpred 12701	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ)
17	8	simpld 494	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 𝑥 ∈ ℂ)
18	17	cxp1d 25766	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥↑_𝑐1) = 𝑥)
19	18	oveq2d 7271	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / (𝑥↑_𝑐1)) = ((log‘𝑥) / 𝑥))
20	19	mpteq2dva 5170	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / (𝑥↑_𝑐1))) = (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)))
21		1rp 12663	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
22		cxploglim 26032	. . . . . . . 8 ⊢ (1 ∈ ℝ⁺ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / (𝑥↑_𝑐1))) ⇝_𝑟 0)
23	21, 22	mp1i 13	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / (𝑥↑_𝑐1))) ⇝_𝑟 0)
24	20, 23	eqbrtrrd 5094	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)) ⇝_𝑟 0)
25		ax-1cn 10860	. . . . . . 7 ⊢ 1 ∈ ℂ
26		divrcnv 15492	. . . . . . 7 ⊢ (1 ∈ ℂ → (𝑥 ∈ ℝ⁺ ↦ (1 / 𝑥)) ⇝_𝑟 0)
27	25, 26	mp1i 13	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (1 / 𝑥)) ⇝_𝑟 0)
28	13, 16, 24, 27	rlimadd 15280	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) / 𝑥) + (1 / 𝑥))) ⇝_𝑟 (0 + 0))
29	11, 28	eqbrtrd 5092	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 (0 + 0))
30		00id 11080	. . . 4 ⊢ (0 + 0) = 0
31	29, 30	breqtrdi 5111	. . 3 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 0)
32		peano2re 11078	. . . . . 6 ⊢ ((log‘𝑥) ∈ ℝ → ((log‘𝑥) + 1) ∈ ℝ)
33	4, 32	syl 17	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) + 1) ∈ ℝ)
34	33, 12	rerpdivcld 12732	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ)
35	34	recnd 10934	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
36		rprege0 12674	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
37	36	adantl 481	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
38		flge0nn0 13468	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥) → (⌊‘𝑥) ∈ ℕ₀)
39		faccl 13925	. . . . . . . . 9 ⊢ ((⌊‘𝑥) ∈ ℕ₀ → (!‘(⌊‘𝑥)) ∈ ℕ)
40	37, 38, 39	3syl 18	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℕ)
41	40	nnrpd 12699	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℝ⁺)
42		relogcl 25636	. . . . . . 7 ⊢ ((!‘(⌊‘𝑥)) ∈ ℝ⁺ → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
43	41, 42	syl 17	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
44	43, 12	rerpdivcld 12732	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℝ)
45	44	recnd 10934	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
46	5, 45	subcld 11262	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) ∈ ℂ)
47		logfacbnd3 26276	. . . . . 6 ⊢ ((𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1))
48	47	adantl 481	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1))
49	43	recnd 10934	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
50	49	adantrr 713	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
51	7	ad2antrl 724	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
52	51	simpld 494	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℂ)
53	5	adantrr 713	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℂ)
54		subcl 11150	. . . . . . . . . 10 ⊢ (((log‘𝑥) ∈ ℂ ∧ 1 ∈ ℂ) → ((log‘𝑥) − 1) ∈ ℂ)
55	53, 25, 54	sylancl 585	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) − 1) ∈ ℂ)
56	52, 55	mulcld 10926	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 · ((log‘𝑥) − 1)) ∈ ℂ)
57	50, 56	subcld 11262	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1))) ∈ ℂ)
58	57	abscld 15076	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ∈ ℝ)
59	4	adantrr 713	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℝ)
60	59, 32	syl 17	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ)
61		rpregt0 12673	. . . . . . 7 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
62	61	ad2antrl 724	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
63		lediv1 11770	. . . . . 6 ⊢ (((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ∈ ℝ ∧ ((log‘𝑥) + 1) ∈ ℝ ∧ (𝑥 ∈ ℝ ∧ 0 < 𝑥)) → ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1) ↔ ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥) ≤ (((log‘𝑥) + 1) / 𝑥)))
64	58, 60, 62, 63	syl3anc 1369	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1) ↔ ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥) ≤ (((log‘𝑥) + 1) / 𝑥)))
65	48, 64	mpbid 231	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥) ≤ (((log‘𝑥) + 1) / 𝑥))
66	51	simprd 495	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ≠ 0)
67	55, 52, 66	divcan3d 11686	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) / 𝑥) = ((log‘𝑥) − 1))
68	67	oveq1d 7270	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
69		divsubdir 11599	. . . . . . . 8 ⊢ (((𝑥 · ((log‘𝑥) − 1)) ∈ ℂ ∧ (log‘(!‘(⌊‘𝑥))) ∈ ℂ ∧ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) → (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥) = (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
70	56, 50, 51, 69	syl3anc 1369	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥) = (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
71	45	adantrr 713	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
72		1cnd 10901	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ∈ ℂ)
73	53, 71, 72	sub32d 11294	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
74	68, 70, 73	3eqtr4rd 2789	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥))
75	74	fveq2d 6760	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = (abs‘(((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥)))
76	56, 50	subcld 11262	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) ∈ ℂ)
77	76, 52, 66	absdivd 15095	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥)) = ((abs‘((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥))))) / (abs‘𝑥)))
78	56, 50	abssubd 15093	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥))))) = (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))))
79	36	ad2antrl 724	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
80		absid 14936	. . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥) → (abs‘𝑥) = 𝑥)
81	79, 80	syl 17	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘𝑥) = 𝑥)
82	78, 81	oveq12d 7273	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((abs‘((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥))))) / (abs‘𝑥)) = ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥))
83	75, 77, 82	3eqtrd 2782	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥))
84	35	adantrr 713	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
85	84	subid1d 11251	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((((log‘𝑥) + 1) / 𝑥) − 0) = (((log‘𝑥) + 1) / 𝑥))
86	85	fveq2d 6760	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (abs‘(((log‘𝑥) + 1) / 𝑥)))
87		log1 25646	. . . . . . . . 9 ⊢ (log‘1) = 0
88		simprr 769	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ≤ 𝑥)
89	12	adantrr 713	. . . . . . . . . . 11 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℝ⁺)
90		logleb 25663	. . . . . . . . . . 11 ⊢ ((1 ∈ ℝ⁺ ∧ 𝑥 ∈ ℝ⁺) → (1 ≤ 𝑥 ↔ (log‘1) ≤ (log‘𝑥)))
91	21, 89, 90	sylancr 586	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (1 ≤ 𝑥 ↔ (log‘1) ≤ (log‘𝑥)))
92	88, 91	mpbid 231	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘1) ≤ (log‘𝑥))
93	87, 92	eqbrtrrid 5106	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 0 ≤ (log‘𝑥))
94	59, 93	ge0p1rpd 12731	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ⁺)
95	94, 89	rpdivcld 12718	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺)
96		rprege0 12674	. . . . . 6 ⊢ ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺ → ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ ∧ 0 ≤ (((log‘𝑥) + 1) / 𝑥)))
97		absid 14936	. . . . . 6 ⊢ (((((log‘𝑥) + 1) / 𝑥) ∈ ℝ ∧ 0 ≤ (((log‘𝑥) + 1) / 𝑥)) → (abs‘(((log‘𝑥) + 1) / 𝑥)) = (((log‘𝑥) + 1) / 𝑥))
98	95, 96, 97	3syl 18	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) + 1) / 𝑥)) = (((log‘𝑥) + 1) / 𝑥))
99	86, 98	eqtrd 2778	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (((log‘𝑥) + 1) / 𝑥))
100	65, 83, 99	3brtr4d 5102	. . 3 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) ≤ (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)))
101	1, 2, 31, 35, 46, 100	rlimsqzlem 15288	. 2 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥))) ⇝_𝑟 1)
102	101	mptru 1546	1 ⊢ (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥))) ⇝_𝑟 1

Colors of variables: wff setvar class

Syntax hints: ↔ wb 205 ∧ wa 395 = wceq 1539 ⊤wtru 1540 ∈ wcel 2108 ≠ wne 2942 class class class wbr 5070 ↦ cmpt 5153 ‘cfv 6418 (class class class)co 7255 ℂcc 10800 ℝcr 10801 0cc0 10802 1c1 10803 + caddc 10805 · cmul 10807 < clt 10940 ≤ cle 10941 − cmin 11135 / cdiv 11562 ℕcn 11903 ℕ₀cn0 12163 ℝ⁺crp 12659 ⌊cfl 13438 !cfa 13915 abscabs 14873 ⇝_𝑟 crli 15122 logclog 25615 ↑_𝑐ccxp 25616

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 ax-addf 10881 ax-mulf 10882

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-supp 7949 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-pm 8576 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fsupp 9059 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-ioo 13012 df-ioc 13013 df-ico 13014 df-icc 13015 df-fz 13169 df-fzo 13312 df-fl 13440 df-mod 13518 df-seq 13650 df-exp 13711 df-fac 13916 df-bc 13945 df-hash 13973 df-shft 14706 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-limsup 15108 df-clim 15125 df-rlim 15126 df-sum 15326 df-ef 15705 df-sin 15707 df-cos 15708 df-pi 15710 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-starv 16903 df-sca 16904 df-vsca 16905 df-ip 16906 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-hom 16912 df-cco 16913 df-rest 17050 df-topn 17051 df-0g 17069 df-gsum 17070 df-topgen 17071 df-pt 17072 df-prds 17075 df-xrs 17130 df-qtop 17135 df-imas 17136 df-xps 17138 df-mre 17212 df-mrc 17213 df-acs 17215 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-submnd 18346 df-mulg 18616 df-cntz 18838 df-cmn 19303 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-fbas 20507 df-fg 20508 df-cnfld 20511 df-top 21951 df-topon 21968 df-topsp 21990 df-bases 22004 df-cld 22078 df-ntr 22079 df-cls 22080 df-nei 22157 df-lp 22195 df-perf 22196 df-cn 22286 df-cnp 22287 df-haus 22374 df-cmp 22446 df-tx 22621 df-hmeo 22814 df-fil 22905 df-fm 22997 df-flim 22998 df-flf 22999 df-xms 23381 df-ms 23382 df-tms 23383 df-cncf 23947 df-limc 24935 df-dv 24936 df-log 25617 df-cxp 25618

This theorem is referenced by: vmadivsum 26535

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