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Theorem logfacrlim 27203

Description: Combine the estimates logfacubnd 27200 and logfaclbnd 27201, 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 11145	. . 3 ⊢ (⊤ → 1 ∈ ℝ)
2		1cnd 11139	. . 3 ⊢ (⊤ → 1 ∈ ℂ)
3		relogcl 26552	. . . . . . . . 9 ⊢ (𝑥 ∈ ℝ⁺ → (log‘𝑥) ∈ ℝ)
4	3	adantl 481	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℝ)
5	4	recnd 11172	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘𝑥) ∈ ℂ)
6		1cnd 11139	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 1 ∈ ℂ)
7		rpcnne0 12936	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
8	7	adantl 481	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
9		divdir 11833	. . . . . . 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 1374	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) = (((log‘𝑥) / 𝑥) + (1 / 𝑥)))
11	10	mpteq2dva 5193	. . . . 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 12992	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / 𝑥) ∈ ℝ)
14		rpreccl 12945	. . . . . . . 8 ⊢ (𝑥 ∈ ℝ⁺ → (1 / 𝑥) ∈ ℝ⁺)
15	14	adantl 481	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ⁺)
16	15	rpred 12961	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (1 / 𝑥) ∈ ℝ)
17	8	simpld 494	. . . . . . . . . 10 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → 𝑥 ∈ ℂ)
18	17	cxp1d 26683	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥↑_𝑐1) = 𝑥)
19	18	oveq2d 7384	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) / (𝑥↑_𝑐1)) = ((log‘𝑥) / 𝑥))
20	19	mpteq2dva 5193	. . . . . . 7 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / (𝑥↑_𝑐1))) = (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)))
21		1rp 12921	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
22		cxploglim 26956	. . . . . . . 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 5124	. . . . . 6 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ ((log‘𝑥) / 𝑥)) ⇝_𝑟 0)
25		ax-1cn 11096	. . . . . . 7 ⊢ 1 ∈ ℂ
26		divrcnv 15787	. . . . . . 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 15578	. . . . 5 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) / 𝑥) + (1 / 𝑥))) ⇝_𝑟 (0 + 0))
29	11, 28	eqbrtrd 5122	. . . 4 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 (0 + 0))
30		00id 11320	. . . 4 ⊢ (0 + 0) = 0
31	29, 30	breqtrdi 5141	. . 3 ⊢ (⊤ → (𝑥 ∈ ℝ⁺ ↦ (((log‘𝑥) + 1) / 𝑥)) ⇝_𝑟 0)
32		peano2re 11318	. . . . . 6 ⊢ ((log‘𝑥) ∈ ℝ → ((log‘𝑥) + 1) ∈ ℝ)
33	4, 32	syl 17	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) + 1) ∈ ℝ)
34	33, 12	rerpdivcld 12992	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ)
35	34	recnd 11172	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
36		rprege0 12933	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
37	36	adantl 481	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
38		flge0nn0 13752	. . . . . . . . 9 ⊢ ((𝑥 ∈ ℝ ∧ 0 ≤ 𝑥) → (⌊‘𝑥) ∈ ℕ₀)
39		faccl 14218	. . . . . . . . 9 ⊢ ((⌊‘𝑥) ∈ ℕ₀ → (!‘(⌊‘𝑥)) ∈ ℕ)
40	37, 38, 39	3syl 18	. . . . . . . 8 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℕ)
41	40	nnrpd 12959	. . . . . . 7 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (!‘(⌊‘𝑥)) ∈ ℝ⁺)
42		relogcl 26552	. . . . . . 7 ⊢ ((!‘(⌊‘𝑥)) ∈ ℝ⁺ → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
43	41, 42	syl 17	. . . . . 6 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℝ)
44	43, 12	rerpdivcld 12992	. . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℝ)
45	44	recnd 11172	. . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
46	5, 45	subcld 11504	. . 3 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → ((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) ∈ ℂ)
47		logfacbnd3 27202	. . . . . 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 11172	. . . . . . . . 9 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ⁺) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
50	49	adantrr 718	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘(!‘(⌊‘𝑥))) ∈ ℂ)
51	7	ad2antrl 729	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
52	51	simpld 494	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℂ)
53	5	adantrr 718	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℂ)
54		subcl 11391	. . . . . . . . . 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 11164	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 · ((log‘𝑥) − 1)) ∈ ℂ)
57	50, 56	subcld 11504	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1))) ∈ ℂ)
58	57	abscld 15374	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) ∈ ℝ)
59	4	adantrr 718	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘𝑥) ∈ ℝ)
60	59, 32	syl 17	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ)
61		rpregt0 12932	. . . . . . 7 ⊢ (𝑥 ∈ ℝ⁺ → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
62	61	ad2antrl 729	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 < 𝑥))
63		lediv1 12019	. . . . . 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 1374	. . . . 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 232	. . . 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 11934	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) / 𝑥) = ((log‘𝑥) − 1))
68	67	oveq1d 7383	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
69		divsubdir 11847	. . . . . . . 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 1374	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥) = (((𝑥 · ((log‘𝑥) − 1)) / 𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
71	45	adantrr 718	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘(!‘(⌊‘𝑥))) / 𝑥) ∈ ℂ)
72		1cnd 11139	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ∈ ℂ)
73	53, 71, 72	sub32d 11536	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((log‘𝑥) − 1) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)))
74	68, 70, 73	3eqtr4rd 2783	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1) = (((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥))
75	74	fveq2d 6846	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = (abs‘(((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) / 𝑥)))
76	56, 50	subcld 11504	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥)))) ∈ ℂ)
77	76, 52, 66	absdivd 15393	. . . . 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 15391	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((𝑥 · ((log‘𝑥) − 1)) − (log‘(!‘(⌊‘𝑥))))) = (abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))))
79	36	ad2antrl 729	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (𝑥 ∈ ℝ ∧ 0 ≤ 𝑥))
80		absid 15231	. . . . . . 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 7386	. . . . 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 2776	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘(((log‘𝑥) − ((log‘(!‘(⌊‘𝑥))) / 𝑥)) − 1)) = ((abs‘((log‘(!‘(⌊‘𝑥))) − (𝑥 · ((log‘𝑥) − 1)))) / 𝑥))
84	35	adantrr 718	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℂ)
85	84	subid1d 11493	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((((log‘𝑥) + 1) / 𝑥) − 0) = (((log‘𝑥) + 1) / 𝑥))
86	85	fveq2d 6846	. . . . 5 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (abs‘(((log‘𝑥) + 1) / 𝑥)))
87		log1 26562	. . . . . . . . 9 ⊢ (log‘1) = 0
88		simprr 773	. . . . . . . . . 10 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 1 ≤ 𝑥)
89	12	adantrr 718	. . . . . . . . . . 11 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 𝑥 ∈ ℝ⁺)
90		logleb 26580	. . . . . . . . . . 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 232	. . . . . . . . 9 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (log‘1) ≤ (log‘𝑥))
93	87, 92	eqbrtrrid 5136	. . . . . . . 8 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → 0 ≤ (log‘𝑥))
94	59, 93	ge0p1rpd 12991	. . . . . . 7 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → ((log‘𝑥) + 1) ∈ ℝ⁺)
95	94, 89	rpdivcld 12978	. . . . . 6 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺)
96		rprege0 12933	. . . . . 6 ⊢ ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ⁺ → ((((log‘𝑥) + 1) / 𝑥) ∈ ℝ ∧ 0 ≤ (((log‘𝑥) + 1) / 𝑥)))
97		absid 15231	. . . . . 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 2772	. . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ⁺ ∧ 1 ≤ 𝑥)) → (abs‘((((log‘𝑥) + 1) / 𝑥) − 0)) = (((log‘𝑥) + 1) / 𝑥))
100	65, 83, 99	3brtr4d 5132	. . 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 15584	. 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 206 ∧ wa 395 = wceq 1542 ⊤wtru 1543 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5100 ↦ cmpt 5181 ‘cfv 6500 (class class class)co 7368 ℂcc 11036 ℝcr 11037 0cc0 11038 1c1 11039 + caddc 11041 · cmul 11043 < clt 11178 ≤ cle 11179 − cmin 11376 / cdiv 11806 ℕcn 12157 ℕ₀cn0 12413 ℝ⁺crp 12917 ⌊cfl 13722 !cfa 14208 abscabs 15169 ⇝_𝑟 crli 15420 logclog 26531 ↑_𝑐ccxp 26532

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-inf2 9562 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 ax-addf 11117

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-of 7632 df-om 7819 df-1st 7943 df-2nd 7944 df-supp 8113 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-2o 8408 df-er 8645 df-map 8777 df-pm 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9277 df-fi 9326 df-sup 9357 df-inf 9358 df-oi 9427 df-card 9863 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-q 12874 df-rp 12918 df-xneg 13038 df-xadd 13039 df-xmul 13040 df-ioo 13277 df-ioc 13278 df-ico 13279 df-icc 13280 df-fz 13436 df-fzo 13583 df-fl 13724 df-mod 13802 df-seq 13937 df-exp 13997 df-fac 14209 df-bc 14238 df-hash 14266 df-shft 15002 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-limsup 15406 df-clim 15423 df-rlim 15424 df-sum 15622 df-ef 16002 df-sin 16004 df-cos 16005 df-pi 16007 df-struct 17086 df-sets 17103 df-slot 17121 df-ndx 17133 df-base 17149 df-ress 17170 df-plusg 17202 df-mulr 17203 df-starv 17204 df-sca 17205 df-vsca 17206 df-ip 17207 df-tset 17208 df-ple 17209 df-ds 17211 df-unif 17212 df-hom 17213 df-cco 17214 df-rest 17354 df-topn 17355 df-0g 17373 df-gsum 17374 df-topgen 17375 df-pt 17376 df-prds 17379 df-xrs 17435 df-qtop 17440 df-imas 17441 df-xps 17443 df-mre 17517 df-mrc 17518 df-acs 17520 df-mgm 18577 df-sgrp 18656 df-mnd 18672 df-submnd 18721 df-mulg 19010 df-cntz 19258 df-cmn 19723 df-psmet 21313 df-xmet 21314 df-met 21315 df-bl 21316 df-mopn 21317 df-fbas 21318 df-fg 21319 df-cnfld 21322 df-top 22850 df-topon 22867 df-topsp 22889 df-bases 22902 df-cld 22975 df-ntr 22976 df-cls 22977 df-nei 23054 df-lp 23092 df-perf 23093 df-cn 23183 df-cnp 23184 df-haus 23271 df-cmp 23343 df-tx 23518 df-hmeo 23711 df-fil 23802 df-fm 23894 df-flim 23895 df-flf 23896 df-xms 24276 df-ms 24277 df-tms 24278 df-cncf 24839 df-limc 25835 df-dv 25836 df-log 26533 df-cxp 26534

This theorem is referenced by: vmadivsum 27461

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