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Theorem logfacrlim 26707

Description: Combine the estimates logfacubnd 26704 and logfaclbnd 26705, 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 11211	. . 3 ⊢ (⊤ → 1 ∈ ℝ)
2		1cnd 11205	. . 3 ⊢ (⊤ → 1 ∈ ℂ)
3		relogcl 26066	. . . . . . . . 9 ⊢ (𝑥 ∈ ℝ⁺ → (log‘𝑥) ∈ ℝ)
4	3	adantl 483	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℝ)
5	4	recnd 11238	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℂ)
6		1cnd 11205	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 1 ∈ ℂ)
7		rpcnne0 12988	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
8	7	adantl 483	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
9		divdir 11893	. . . . . . 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 1372	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) = (((log‘𝑥) / 𝑥) + (1 / 𝑥)))
11	10	mpteq2dva 5247	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) = (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) / 𝑥) + (1 / 𝑥))))
12		simpr 486	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 𝑥 ∈ ℝ⁺)
13	4, 12	rerpdivcld 13043	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / 𝑥) ∈ ℝ)
14		rpreccl 12996	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (1 / 𝑥) ∈ ℝ⁺)
15	14	adantl 483	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ⁺)
16	15	rpred 13012	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ)
17	8	simpld 496	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 𝑥 ∈ ℂ)
18	17	cxp1d 26196	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥↑_𝑐1) = 𝑥)
19	18	oveq2d 7420	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / (𝑥↑_𝑐1)) = ((log‘𝑥) / 𝑥))
20	19	mpteq2dva 5247	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / (𝑥↑_𝑐1))) = (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)))
21		1rp 12974	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
22		cxploglim 26462	. . . . . . . 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 5171	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)) ⇝_𝑟 0)
25		ax-1cn 11164	. . . . . . 7 ⊢ 1 ∈ ℂ
26		divrcnv 15794	. . . . . . 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 15583	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) / 𝑥) + (1 / 𝑥))) ⇝_𝑟 (0 + 0))
29	11, 28	eqbrtrd 5169	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 (0 + 0))
30		00id 11385	. . . 4 ⊢ (0 + 0) = 0
31	29, 30	breqtrdi 5188	. . 3 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 0)
32		peano2re 11383	. . . . . 6 ⊢ ((log‘𝑥) ∈ ℝ → ((log‘𝑥) + 1) ∈ ℝ)
33	4, 32	syl 17	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) + 1) ∈ ℝ)
34	33, 12	rerpdivcld 13043	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ)
35	34	recnd 11238	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
36		rprege0 12985	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
37	36	adantl 483	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
38		flge0nn0 13781	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥) → (⌊‘𝑥) ∈ ℕ₀)
39		faccl 14239	. . . . . . . . 9 ⊢ ((⌊‘𝑥) ∈ ℕ₀ → (!‘(⌊‘𝑥)) ∈ ℕ)
40	37, 38, 39	3syl 18	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℕ)
41	40	nnrpd 13010	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℝ⁺)
42		relogcl 26066	. . . . . . 7 ⊢ ((!‘(⌊‘𝑥)) ∈ ℝ⁺ → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
43	41, 42	syl 17	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
44	43, 12	rerpdivcld 13043	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℝ)
45	44	recnd 11238	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
46	5, 45	subcld 11567	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) ∈ ℂ)
47		logfacbnd3 26706	. . . . . 6 ⊢ ((𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1))
48	47	adantl 483	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ≤ ((log‘𝑥) + 1))
49	43	recnd 11238	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
50	49	adantrr 716	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
51	7	ad2antrl 727	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
52	51	simpld 496	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℂ)
53	5	adantrr 716	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℂ)
54		subcl 11455	. . . . . . . . . 10 ⊢ (((log‘𝑥) ∈ ℂ ∧ 1 ∈ ℂ) → ((log‘𝑥) − 1) ∈ ℂ)
55	53, 25, 54	sylancl 587	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) − 1) ∈ ℂ)
56	52, 55	mulcld 11230	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 · ((log‘𝑥) − 1)) ∈ ℂ)
57	50, 56	subcld 11567	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1))) ∈ ℂ)
58	57	abscld 15379	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ∈ ℝ)
59	4	adantrr 716	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℝ)
60	59, 32	syl 17	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ)
61		rpregt0 12984	. . . . . . 7 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
62	61	ad2antrl 727	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
63		lediv1 12075	. . . . . 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 1372	. . . . 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 497	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ≠ 0)
67	55, 52, 66	divcan3d 11991	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) / 𝑥) = ((log‘𝑥) − 1))
68	67	oveq1d 7419	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
69		divsubdir 11904	. . . . . . . 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 1372	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥) = (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
71	45	adantrr 716	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
72		1cnd 11205	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ∈ ℂ)
73	53, 71, 72	sub32d 11599	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
74	68, 70, 73	3eqtr4rd 2784	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥))
75	74	fveq2d 6892	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = (abs‘(((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥)))
76	56, 50	subcld 11567	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) ∈ ℂ)
77	76, 52, 66	absdivd 15398	. . . . 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 15396	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥))))) = (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))))
79	36	ad2antrl 727	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
80		absid 15239	. . . . . . 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 7422	. . . . 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 2777	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥))
84	35	adantrr 716	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
85	84	subid1d 11556	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((((log‘𝑥) + 1) / 𝑥) − 0) = (((log‘𝑥) + 1) / 𝑥))
86	85	fveq2d 6892	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (abs‘(((log‘𝑥) + 1) / 𝑥)))
87		log1 26076	. . . . . . . . 9 ⊢ (log‘1) = 0
88		simprr 772	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ≤ 𝑥)
89	12	adantrr 716	. . . . . . . . . . 11 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℝ⁺)
90		logleb 26093	. . . . . . . . . . 11 ⊢ ((1 ∈ ℝ⁺ ∧ 𝑥 ∈ ℝ⁺) → (1 ≤ 𝑥 ↔ (log‘1) ≤ (log‘𝑥)))
91	21, 89, 90	sylancr 588	. . . . . . . . . 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 5183	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 0 ≤ (log‘𝑥))
94	59, 93	ge0p1rpd 13042	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ⁺)
95	94, 89	rpdivcld 13029	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺)
96		rprege0 12985	. . . . . 6 ⊢ ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺ → ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ ∧ 0 ≤ (((log‘𝑥) + 1) / 𝑥)))
97		absid 15239	. . . . . 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 2773	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (((log‘𝑥) + 1) / 𝑥))
100	65, 83, 99	3brtr4d 5179	. . 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 15591	. 2 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥))) ⇝_𝑟 1)
102	101	mptru 1549	1 ⊢ (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥))) ⇝_𝑟 1

Colors of variables: wff setvar class

Syntax hints: ↔ wb 205 ∧ wa 397 = wceq 1542 ⊤wtru 1543 ∈ wcel 2107 ≠ wne 2941 class class class wbr 5147 ↦ cmpt 5230 ‘cfv 6540 (class class class)co 7404 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 + caddc 11109 · cmul 11111 < clt 11244 ≤ cle 11245 − cmin 11440 / cdiv 11867 ℕcn 12208 ℕ₀cn0 12468 ℝ⁺crp 12970 ⌊cfl 13751 !cfa 14229 abscabs 15177 ⇝_𝑟 crli 15425 logclog 26045 ↑_𝑐ccxp 26046

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7720 ax-inf2 9632 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 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 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-of 7665 df-om 7851 df-1st 7970 df-2nd 7971 df-supp 8142 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-1o 8461 df-2o 8462 df-er 8699 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-fi 9402 df-sup 9433 df-inf 9434 df-oi 9501 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ioc 13325 df-ico 13326 df-icc 13327 df-fz 13481 df-fzo 13624 df-fl 13753 df-mod 13831 df-seq 13963 df-exp 14024 df-fac 14230 df-bc 14259 df-hash 14287 df-shft 15010 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-limsup 15411 df-clim 15428 df-rlim 15429 df-sum 15629 df-ef 16007 df-sin 16009 df-cos 16010 df-pi 16012 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-hom 17217 df-cco 17218 df-rest 17364 df-topn 17365 df-0g 17383 df-gsum 17384 df-topgen 17385 df-pt 17386 df-prds 17389 df-xrs 17444 df-qtop 17449 df-imas 17450 df-xps 17452 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-submnd 18668 df-mulg 18945 df-cntz 19175 df-cmn 19643 df-psmet 20921 df-xmet 20922 df-met 20923 df-bl 20924 df-mopn 20925 df-fbas 20926 df-fg 20927 df-cnfld 20930 df-top 22378 df-topon 22395 df-topsp 22417 df-bases 22431 df-cld 22505 df-ntr 22506 df-cls 22507 df-nei 22584 df-lp 22622 df-perf 22623 df-cn 22713 df-cnp 22714 df-haus 22801 df-cmp 22873 df-tx 23048 df-hmeo 23241 df-fil 23332 df-fm 23424 df-flim 23425 df-flf 23426 df-xms 23808 df-ms 23809 df-tms 23810 df-cncf 24376 df-limc 25365 df-dv 25366 df-log 26047 df-cxp 26048

This theorem is referenced by: vmadivsum 26965

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