stirlinglem14 - Mathbox for Glauco Siliprandi

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Theorem stirlinglem14 46102

Description: The sequence 𝐴 converges to a positive real. This proves that the Stirling's formula converges to the factorial, up to a constant. In another theorem, using Wallis' formula for π& , such constant is exactly determined, thus proving the Stirling's formula. (Contributed by Glauco Siliprandi, 29-Jun-2017.)

**Hypotheses**
Ref	Expression
stirlinglem14.1	⊢ 𝐴 = (𝑛 ∈ ℕ ↦ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))))
stirlinglem14.2	⊢ 𝐵 = (𝑛 ∈ ℕ ↦ (log‘(𝐴‘𝑛)))

**Assertion**
Ref	Expression
stirlinglem14	⊢ ∃𝑐 ∈ ℝ⁺ 𝐴 ⇝ 𝑐

Distinct variable group: 𝐴,𝑐 Allowed substitution hints: 𝐴(𝑛) 𝐵(𝑛,𝑐)

Proof of Theorem stirlinglem14 Dummy variables 𝑑 𝑘 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		stirlinglem14.1	. . 3 ⊢ 𝐴 = (𝑛 ∈ ℕ ↦ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))))
2		stirlinglem14.2	. . 3 ⊢ 𝐵 = (𝑛 ∈ ℕ ↦ (log‘(𝐴‘𝑛)))
3	1, 2	stirlinglem13 46101	. 2 ⊢ ∃𝑑 ∈ ℝ 𝐵 ⇝ 𝑑
4		simpl 482	. . . . 5 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 𝑑 ∈ ℝ)
5	4	rpefcld 16141	. . . 4 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → (exp‘𝑑) ∈ ℝ⁺)
6		nnuz 12921	. . . . . 6 ⊢ ℕ = (ℤ_≥‘1)
7		1zzd 12648	. . . . . 6 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 1 ∈ ℤ)
8		efcn 26487	. . . . . . 7 ⊢ exp ∈ (ℂ–cn→ℂ)
9	8	a1i 11	. . . . . 6 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → exp ∈ (ℂ–cn→ℂ))
10		nnnn0 12533	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℕ₀)
11		faccl 14322	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ₀ → (!‘𝑛) ∈ ℕ)
12		nncn 12274	. . . . . . . . . . . . 13 ⊢ ((!‘𝑛) ∈ ℕ → (!‘𝑛) ∈ ℂ)
13	10, 11, 12	3syl 18	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ → (!‘𝑛) ∈ ℂ)
14		2cnd 12344	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → 2 ∈ ℂ)
15		nncn 12274	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℂ)
16	14, 15	mulcld 11281	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → (2 · 𝑛) ∈ ℂ)
17	16	sqrtcld 15476	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → (√‘(2 · 𝑛)) ∈ ℂ)
18		epr 16244	. . . . . . . . . . . . . . . . 17 ⊢ e ∈ ℝ⁺
19		rpcn 13045	. . . . . . . . . . . . . . . . 17 ⊢ (e ∈ ℝ⁺ → e ∈ ℂ)
20	18, 19	ax-mp 5	. . . . . . . . . . . . . . . 16 ⊢ e ∈ ℂ
21	20	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → e ∈ ℂ)
22		0re 11263	. . . . . . . . . . . . . . . . 17 ⊢ 0 ∈ ℝ
23		epos 16243	. . . . . . . . . . . . . . . . 17 ⊢ 0 < e
24	22, 23	gtneii 11373	. . . . . . . . . . . . . . . 16 ⊢ e ≠ 0
25	24	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → e ≠ 0)
26	15, 21, 25	divcld 12043	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → (𝑛 / e) ∈ ℂ)
27	26, 10	expcld 14186	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → ((𝑛 / e)↑𝑛) ∈ ℂ)
28	17, 27	mulcld 11281	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ → ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛)) ∈ ℂ)
29		2rp 13039	. . . . . . . . . . . . . . . . 17 ⊢ 2 ∈ ℝ⁺
30	29	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ ℕ → 2 ∈ ℝ⁺)
31		nnrp 13046	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℝ⁺)
32	30, 31	rpmulcld 13093	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → (2 · 𝑛) ∈ ℝ⁺)
33	32	sqrtgt0d 15451	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → 0 < (√‘(2 · 𝑛)))
34	33	gt0ne0d 11827	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → (√‘(2 · 𝑛)) ≠ 0)
35		nnne0 12300	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ ℕ → 𝑛 ≠ 0)
36	15, 21, 35, 25	divne0d 12059	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → (𝑛 / e) ≠ 0)
37		nnz 12634	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℤ)
38	26, 36, 37	expne0d 14192	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → ((𝑛 / e)↑𝑛) ≠ 0)
39	17, 27, 34, 38	mulne0d 11915	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ → ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛)) ≠ 0)
40	13, 28, 39	divcld 12043	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))) ∈ ℂ)
41	1	fvmpt2 7027	. . . . . . . . . . 11 ⊢ ((𝑛 ∈ ℕ ∧ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))) ∈ ℂ) → (𝐴‘𝑛) = ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))))
42	40, 41	mpdan 687	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ → (𝐴‘𝑛) = ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))))
43	42, 40	eqeltrd 2841	. . . . . . . . 9 ⊢ (𝑛 ∈ ℕ → (𝐴‘𝑛) ∈ ℂ)
44		nnne0 12300	. . . . . . . . . . . 12 ⊢ ((!‘𝑛) ∈ ℕ → (!‘𝑛) ≠ 0)
45	10, 11, 44	3syl 18	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → (!‘𝑛) ≠ 0)
46	13, 28, 45, 39	divne0d 12059	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ → ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))) ≠ 0)
47	42, 46	eqnetrd 3008	. . . . . . . . 9 ⊢ (𝑛 ∈ ℕ → (𝐴‘𝑛) ≠ 0)
48	43, 47	logcld 26612	. . . . . . . 8 ⊢ (𝑛 ∈ ℕ → (log‘(𝐴‘𝑛)) ∈ ℂ)
49	2, 48	fmpti 7132	. . . . . . 7 ⊢ 𝐵:ℕ⟶ℂ
50	49	a1i 11	. . . . . 6 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 𝐵:ℕ⟶ℂ)
51		simpr 484	. . . . . 6 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 𝐵 ⇝ 𝑑)
52	4	recnd 11289	. . . . . 6 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 𝑑 ∈ ℂ)
53	6, 7, 9, 50, 51, 52	climcncf 24926	. . . . 5 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → (exp ∘ 𝐵) ⇝ (exp‘𝑑))
54	8	elexi 3503	. . . . . . . . 9 ⊢ exp ∈ V
55		nnex 12272	. . . . . . . . . . 11 ⊢ ℕ ∈ V
56	55	mptex 7243	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ ↦ (log‘(𝐴‘𝑛))) ∈ V
57	2, 56	eqeltri 2837	. . . . . . . . 9 ⊢ 𝐵 ∈ V
58	54, 57	coex 7952	. . . . . . . 8 ⊢ (exp ∘ 𝐵) ∈ V
59	58	a1i 11	. . . . . . 7 ⊢ (⊤ → (exp ∘ 𝐵) ∈ V)
60	55	mptex 7243	. . . . . . . . 9 ⊢ (𝑛 ∈ ℕ ↦ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛)))) ∈ V
61	1, 60	eqeltri 2837	. . . . . . . 8 ⊢ 𝐴 ∈ V
62	61	a1i 11	. . . . . . 7 ⊢ (⊤ → 𝐴 ∈ V)
63		1zzd 12648	. . . . . . 7 ⊢ (⊤ → 1 ∈ ℤ)
64	2	funmpt2 6605	. . . . . . . . . 10 ⊢ Fun 𝐵
65		id 22	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ)
66		rabid2 3470	. . . . . . . . . . . . 13 ⊢ (ℕ = {𝑛 ∈ ℕ ∣ (log‘(𝐴‘𝑛)) ∈ V} ↔ ∀𝑛 ∈ ℕ (log‘(𝐴‘𝑛)) ∈ V)
67	1	stirlinglem2 46090	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ → (𝐴‘𝑛) ∈ ℝ⁺)
68		relogcl 26617	. . . . . . . . . . . . . 14 ⊢ ((𝐴‘𝑛) ∈ ℝ⁺ → (log‘(𝐴‘𝑛)) ∈ ℝ)
69		elex 3501	. . . . . . . . . . . . . 14 ⊢ ((log‘(𝐴‘𝑛)) ∈ ℝ → (log‘(𝐴‘𝑛)) ∈ V)
70	67, 68, 69	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → (log‘(𝐴‘𝑛)) ∈ V)
71	66, 70	mprgbir 3068	. . . . . . . . . . . 12 ⊢ ℕ = {𝑛 ∈ ℕ ∣ (log‘(𝐴‘𝑛)) ∈ V}
72	2	dmmpt 6260	. . . . . . . . . . . 12 ⊢ dom 𝐵 = {𝑛 ∈ ℕ ∣ (log‘(𝐴‘𝑛)) ∈ V}
73	71, 72	eqtr4i 2768	. . . . . . . . . . 11 ⊢ ℕ = dom 𝐵
74	65, 73	eleqtrdi 2851	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ dom 𝐵)
75		fvco 7007	. . . . . . . . . 10 ⊢ ((Fun 𝐵 ∧ 𝑘 ∈ dom 𝐵) → ((exp ∘ 𝐵)‘𝑘) = (exp‘(𝐵‘𝑘)))
76	64, 74, 75	sylancr 587	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → ((exp ∘ 𝐵)‘𝑘) = (exp‘(𝐵‘𝑘)))
77	1	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ ℕ → 𝐴 = (𝑛 ∈ ℕ ↦ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛)))))
78		simpr 484	. . . . . . . . . . . . . . . 16 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → 𝑛 = 𝑘)
79	78	fveq2d 6910	. . . . . . . . . . . . . . 15 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → (!‘𝑛) = (!‘𝑘))
80	78	oveq2d 7447	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → (2 · 𝑛) = (2 · 𝑘))
81	80	fveq2d 6910	. . . . . . . . . . . . . . . 16 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → (√‘(2 · 𝑛)) = (√‘(2 · 𝑘)))
82	78	oveq1d 7446	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → (𝑛 / e) = (𝑘 / e))
83	82, 78	oveq12d 7449	. . . . . . . . . . . . . . . 16 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → ((𝑛 / e)↑𝑛) = ((𝑘 / e)↑𝑘))
84	81, 83	oveq12d 7449	. . . . . . . . . . . . . . 15 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛)) = ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘)))
85	79, 84	oveq12d 7449	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 = 𝑘) → ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))) = ((!‘𝑘) / ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘))))
86		nnnn0 12533	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ₀)
87		faccl 14322	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ₀ → (!‘𝑘) ∈ ℕ)
88		nncn 12274	. . . . . . . . . . . . . . . 16 ⊢ ((!‘𝑘) ∈ ℕ → (!‘𝑘) ∈ ℂ)
89	86, 87, 88	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ ℕ → (!‘𝑘) ∈ ℂ)
90		2cnd 12344	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℂ)
91		nncn 12274	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℂ)
92	90, 91	mulcld 11281	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ → (2 · 𝑘) ∈ ℂ)
93	92	sqrtcld 15476	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → (√‘(2 · 𝑘)) ∈ ℂ)
94	20	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → e ∈ ℂ)
95	24	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → e ≠ 0)
96	91, 94, 95	divcld 12043	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ → (𝑘 / e) ∈ ℂ)
97	96, 86	expcld 14186	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → ((𝑘 / e)↑𝑘) ∈ ℂ)
98	93, 97	mulcld 11281	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ ℕ → ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘)) ∈ ℂ)
99	29	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℝ⁺)
100		nnrp 13046	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℝ⁺)
101	99, 100	rpmulcld 13093	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → (2 · 𝑘) ∈ ℝ⁺)
102	101	sqrtgt0d 15451	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ → 0 < (√‘(2 · 𝑘)))
103	102	gt0ne0d 11827	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → (√‘(2 · 𝑘)) ≠ 0)
104		nnne0 12300	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ ℕ → 𝑘 ≠ 0)
105	91, 94, 104, 95	divne0d 12059	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ → (𝑘 / e) ≠ 0)
106		nnz 12634	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℤ)
107	96, 105, 106	expne0d 14192	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ → ((𝑘 / e)↑𝑘) ≠ 0)
108	93, 97, 103, 107	mulne0d 11915	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ ℕ → ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘)) ≠ 0)
109	89, 98, 108	divcld 12043	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ ℕ → ((!‘𝑘) / ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘))) ∈ ℂ)
110	77, 85, 65, 109	fvmptd 7023	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → (𝐴‘𝑘) = ((!‘𝑘) / ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘))))
111	110, 109	eqeltrd 2841	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → (𝐴‘𝑘) ∈ ℂ)
112		nnne0 12300	. . . . . . . . . . . . . . 15 ⊢ ((!‘𝑘) ∈ ℕ → (!‘𝑘) ≠ 0)
113	86, 87, 112	3syl 18	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ ℕ → (!‘𝑘) ≠ 0)
114	89, 98, 113, 108	divne0d 12059	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → ((!‘𝑘) / ((√‘(2 · 𝑘)) · ((𝑘 / e)↑𝑘))) ≠ 0)
115	110, 114	eqnetrd 3008	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → (𝐴‘𝑘) ≠ 0)
116	111, 115	logcld 26612	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → (log‘(𝐴‘𝑘)) ∈ ℂ)
117		nfcv 2905	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛𝑘
118		nfcv 2905	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑛log
119		nfmpt1 5250	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑛(𝑛 ∈ ℕ ↦ ((!‘𝑛) / ((√‘(2 · 𝑛)) · ((𝑛 / e)↑𝑛))))
120	1, 119	nfcxfr 2903	. . . . . . . . . . . . . 14 ⊢ Ⅎ𝑛𝐴
121	120, 117	nffv 6916	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑛(𝐴‘𝑘)
122	118, 121	nffv 6916	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛(log‘(𝐴‘𝑘))
123		2fveq3 6911	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑘 → (log‘(𝐴‘𝑛)) = (log‘(𝐴‘𝑘)))
124	117, 122, 123, 2	fvmptf 7037	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℕ ∧ (log‘(𝐴‘𝑘)) ∈ ℂ) → (𝐵‘𝑘) = (log‘(𝐴‘𝑘)))
125	116, 124	mpdan 687	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (𝐵‘𝑘) = (log‘(𝐴‘𝑘)))
126	125	fveq2d 6910	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (exp‘(𝐵‘𝑘)) = (exp‘(log‘(𝐴‘𝑘))))
127		eflog 26618	. . . . . . . . . 10 ⊢ (((𝐴‘𝑘) ∈ ℂ ∧ (𝐴‘𝑘) ≠ 0) → (exp‘(log‘(𝐴‘𝑘))) = (𝐴‘𝑘))
128	111, 115, 127	syl2anc 584	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (exp‘(log‘(𝐴‘𝑘))) = (𝐴‘𝑘))
129	76, 126, 128	3eqtrd 2781	. . . . . . . 8 ⊢ (𝑘 ∈ ℕ → ((exp ∘ 𝐵)‘𝑘) = (𝐴‘𝑘))
130	129	adantl 481	. . . . . . 7 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → ((exp ∘ 𝐵)‘𝑘) = (𝐴‘𝑘))
131	6, 59, 62, 63, 130	climeq 15603	. . . . . 6 ⊢ (⊤ → ((exp ∘ 𝐵) ⇝ (exp‘𝑑) ↔ 𝐴 ⇝ (exp‘𝑑)))
132	131	mptru 1547	. . . . 5 ⊢ ((exp ∘ 𝐵) ⇝ (exp‘𝑑) ↔ 𝐴 ⇝ (exp‘𝑑))
133	53, 132	sylib 218	. . . 4 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → 𝐴 ⇝ (exp‘𝑑))
134		breq2 5147	. . . . 5 ⊢ (𝑐 = (exp‘𝑑) → (𝐴 ⇝ 𝑐 ↔ 𝐴 ⇝ (exp‘𝑑)))
135	134	rspcev 3622	. . . 4 ⊢ (((exp‘𝑑) ∈ ℝ⁺ ∧ 𝐴 ⇝ (exp‘𝑑)) → ∃𝑐 ∈ ℝ⁺ 𝐴 ⇝ 𝑐)
136	5, 133, 135	syl2anc 584	. . 3 ⊢ ((𝑑 ∈ ℝ ∧ 𝐵 ⇝ 𝑑) → ∃𝑐 ∈ ℝ⁺ 𝐴 ⇝ 𝑐)
137	136	rexlimiva 3147	. 2 ⊢ (∃𝑑 ∈ ℝ 𝐵 ⇝ 𝑑 → ∃𝑐 ∈ ℝ⁺ 𝐴 ⇝ 𝑐)
138	3, 137	ax-mp 5	1 ⊢ ∃𝑐 ∈ ℝ⁺ 𝐴 ⇝ 𝑐

Colors of variables: wff setvar class

Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1540 ⊤wtru 1541 ∈ wcel 2108 ≠ wne 2940 ∃wrex 3070 {crab 3436 Vcvv 3480 class class class wbr 5143 ↦ cmpt 5225 dom cdm 5685 ∘ ccom 5689 Fun wfun 6555 ⟶wf 6557 ‘cfv 6561 (class class class)co 7431 ℂcc 11153 ℝcr 11154 0cc0 11155 1c1 11156 · cmul 11160 / cdiv 11920 ℕcn 12266 2c2 12321 ℕ₀cn0 12526 ℝ⁺crp 13034 ↑cexp 14102 !cfa 14312 √csqrt 15272 ⇝ cli 15520 expce 16097 eceu 16098 –cn→ccncf 24902 logclog 26596

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 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-inf2 9681 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233 ax-addf 11234

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-iin 4994 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-se 5638 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-isom 6570 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-of 7697 df-om 7888 df-1st 8014 df-2nd 8015 df-supp 8186 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-2o 8507 df-oadd 8510 df-er 8745 df-map 8868 df-pm 8869 df-ixp 8938 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-fsupp 9402 df-fi 9451 df-sup 9482 df-inf 9483 df-oi 9550 df-card 9979 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-xnn0 12600 df-z 12614 df-dec 12734 df-uz 12879 df-q 12991 df-rp 13035 df-xneg 13154 df-xadd 13155 df-xmul 13156 df-ioo 13391 df-ioc 13392 df-ico 13393 df-icc 13394 df-fz 13548 df-fzo 13695 df-fl 13832 df-mod 13910 df-seq 14043 df-exp 14103 df-fac 14313 df-bc 14342 df-hash 14370 df-shft 15106 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 df-limsup 15507 df-clim 15524 df-rlim 15525 df-sum 15723 df-ef 16103 df-e 16104 df-sin 16105 df-cos 16106 df-tan 16107 df-pi 16108 df-dvds 16291 df-struct 17184 df-sets 17201 df-slot 17219 df-ndx 17231 df-base 17248 df-ress 17275 df-plusg 17310 df-mulr 17311 df-starv 17312 df-sca 17313 df-vsca 17314 df-ip 17315 df-tset 17316 df-ple 17317 df-ds 17319 df-unif 17320 df-hom 17321 df-cco 17322 df-rest 17467 df-topn 17468 df-0g 17486 df-gsum 17487 df-topgen 17488 df-pt 17489 df-prds 17492 df-xrs 17547 df-qtop 17552 df-imas 17553 df-xps 17555 df-mre 17629 df-mrc 17630 df-acs 17632 df-mgm 18653 df-sgrp 18732 df-mnd 18748 df-submnd 18797 df-mulg 19086 df-cntz 19335 df-cmn 19800 df-psmet 21356 df-xmet 21357 df-met 21358 df-bl 21359 df-mopn 21360 df-fbas 21361 df-fg 21362 df-cnfld 21365 df-top 22900 df-topon 22917 df-topsp 22939 df-bases 22953 df-cld 23027 df-ntr 23028 df-cls 23029 df-nei 23106 df-lp 23144 df-perf 23145 df-cn 23235 df-cnp 23236 df-haus 23323 df-cmp 23395 df-tx 23570 df-hmeo 23763 df-fil 23854 df-fm 23946 df-flim 23947 df-flf 23948 df-xms 24330 df-ms 24331 df-tms 24332 df-cncf 24904 df-limc 25901 df-dv 25902 df-ulm 26420 df-log 26598 df-cxp 26599

This theorem is referenced by: stirling 46104

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