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Theorem iprodgam 34435

Description: An infinite product version of Euler's gamma function. (Contributed by Scott Fenton, 12-Feb-2018.)

**Hypothesis**
Ref	Expression
iprodgam.1	⊢ (𝜑 → 𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)))

**Assertion**
Ref	Expression
iprodgam	⊢ (𝜑 → (Γ‘𝐴) = (∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))) / 𝐴))

Distinct variable groups: 𝐴,𝑘 𝜑,𝑘

Proof of Theorem iprodgam Dummy variables 𝑗 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		iprodgam.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)))
2		eflgam 26446	. . 3 ⊢ (𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)) → (exp‘(log Γ‘𝐴)) = (Γ‘𝐴))
3	1, 2	syl 17	. 2 ⊢ (𝜑 → (exp‘(log Γ‘𝐴)) = (Γ‘𝐴))
4		oveq1 7384	. . . . . . . . 9 ⊢ (𝑧 = 𝐴 → (𝑧 · (log‘((𝑘 + 1) / 𝑘))) = (𝐴 · (log‘((𝑘 + 1) / 𝑘))))
5		oveq1 7384	. . . . . . . . . 10 ⊢ (𝑧 = 𝐴 → (𝑧 / 𝑘) = (𝐴 / 𝑘))
6	5	fvoveq1d 7399	. . . . . . . . 9 ⊢ (𝑧 = 𝐴 → (log‘((𝑧 / 𝑘) + 1)) = (log‘((𝐴 / 𝑘) + 1)))
7	4, 6	oveq12d 7395	. . . . . . . 8 ⊢ (𝑧 = 𝐴 → ((𝑧 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝑧 / 𝑘) + 1))) = ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))))
8	7	sumeq2sdv 15615	. . . . . . 7 ⊢ (𝑧 = 𝐴 → Σ𝑘 ∈ ℕ ((𝑧 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝑧 / 𝑘) + 1))) = Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))))
9		fveq2 6862	. . . . . . 7 ⊢ (𝑧 = 𝐴 → (log‘𝑧) = (log‘𝐴))
10	8, 9	oveq12d 7395	. . . . . 6 ⊢ (𝑧 = 𝐴 → (Σ𝑘 ∈ ℕ ((𝑧 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝑧 / 𝑘) + 1))) − (log‘𝑧)) = (Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴)))
11		df-lgam 26420	. . . . . 6 ⊢ log Γ = (𝑧 ∈ (ℂ ∖ (ℤ ∖ ℕ)) ↦ (Σ𝑘 ∈ ℕ ((𝑧 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝑧 / 𝑘) + 1))) − (log‘𝑧)))
12		ovex 7410	. . . . . 6 ⊢ (Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴)) ∈ V
13	10, 11, 12	fvmpt 6968	. . . . 5 ⊢ (𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)) → (log Γ‘𝐴) = (Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴)))
14	1, 13	syl 17	. . . 4 ⊢ (𝜑 → (log Γ‘𝐴) = (Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴)))
15	14	fveq2d 6866	. . 3 ⊢ (𝜑 → (exp‘(log Γ‘𝐴)) = (exp‘(Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴))))
16		nnuz 12830	. . . . . 6 ⊢ ℕ = (ℤ_≥‘1)
17		1zzd 12558	. . . . . 6 ⊢ (𝜑 → 1 ∈ ℤ)
18		oveq1 7384	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (𝑗 + 1) = (𝑘 + 1))
19		id 22	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → 𝑗 = 𝑘)
20	18, 19	oveq12d 7395	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝑗 + 1) / 𝑗) = ((𝑘 + 1) / 𝑘))
21	20	fveq2d 6866	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (log‘((𝑗 + 1) / 𝑗)) = (log‘((𝑘 + 1) / 𝑘)))
22	21	oveq2d 7393	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (𝐴 · (log‘((𝑗 + 1) / 𝑗))) = (𝐴 · (log‘((𝑘 + 1) / 𝑘))))
23		oveq2 7385	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (𝐴 / 𝑗) = (𝐴 / 𝑘))
24	23	fvoveq1d 7399	. . . . . . . . 9 ⊢ (𝑗 = 𝑘 → (log‘((𝐴 / 𝑗) + 1)) = (log‘((𝐴 / 𝑘) + 1)))
25	22, 24	oveq12d 7395	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))) = ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))))
26		eqid 2731	. . . . . . . 8 ⊢ (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1)))) = (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))
27		ovex 7410	. . . . . . . 8 ⊢ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) ∈ V
28	25, 26, 27	fvmpt 6968	. . . . . . 7 ⊢ (𝑘 ∈ ℕ → ((𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))‘𝑘) = ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))))
29	28	adantl 482	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))‘𝑘) = ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))))
30	1	eldifad 3940	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ∈ ℂ)
31	30	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐴 ∈ ℂ)
32		peano2nn 12189	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
33	32	adantl 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℕ)
34	33	nncnd 12193	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℂ)
35		nncn 12185	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℂ)
36	35	adantl 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℂ)
37		nnne0 12211	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ≠ 0)
38	37	adantl 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ≠ 0)
39	34, 36, 38	divcld 11955	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) / 𝑘) ∈ ℂ)
40	33	nnne0d 12227	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ≠ 0)
41	34, 36, 40, 38	divne0d 11971	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) / 𝑘) ≠ 0)
42	39, 41	logcld 25978	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (log‘((𝑘 + 1) / 𝑘)) ∈ ℂ)
43	31, 42	mulcld 11199	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐴 · (log‘((𝑘 + 1) / 𝑘))) ∈ ℂ)
44	31, 36, 38	divcld 11955	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐴 / 𝑘) ∈ ℂ)
45		1cnd 11174	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ∈ ℂ)
46	44, 45	addcld 11198	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴 / 𝑘) + 1) ∈ ℂ)
47	1	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)))
48		simpr 485	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
49	47, 48	dmgmdivn0 26429	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴 / 𝑘) + 1) ≠ 0)
50	46, 49	logcld 25978	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (log‘((𝐴 / 𝑘) + 1)) ∈ ℂ)
51	43, 50	subcld 11536	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) ∈ ℂ)
52	26, 1	lgamcvg 26455	. . . . . . 7 ⊢ (𝜑 → seq1( + , (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))) ⇝ ((log Γ‘𝐴) + (log‘𝐴)))
53		seqex 13933	. . . . . . . 8 ⊢ seq1( + , (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))) ∈ V
54		ovex 7410	. . . . . . . 8 ⊢ ((log Γ‘𝐴) + (log‘𝐴)) ∈ V
55	53, 54	breldm 5884	. . . . . . 7 ⊢ (seq1( + , (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))) ⇝ ((log Γ‘𝐴) + (log‘𝐴)) → seq1( + , (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))) ∈ dom ⇝ )
56	52, 55	syl 17	. . . . . 6 ⊢ (𝜑 → seq1( + , (𝑗 ∈ ℕ ↦ ((𝐴 · (log‘((𝑗 + 1) / 𝑗))) − (log‘((𝐴 / 𝑗) + 1))))) ∈ dom ⇝ )
57	16, 17, 29, 51, 56	isumcl 15672	. . . . 5 ⊢ (𝜑 → Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) ∈ ℂ)
58	1	dmgmn0 26427	. . . . . 6 ⊢ (𝜑 → 𝐴 ≠ 0)
59	30, 58	logcld 25978	. . . . 5 ⊢ (𝜑 → (log‘𝐴) ∈ ℂ)
60		efsub 16008	. . . . 5 ⊢ ((Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) ∈ ℂ ∧ (log‘𝐴) ∈ ℂ) → (exp‘(Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴))) = ((exp‘Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) / (exp‘(log‘𝐴))))
61	57, 59, 60	syl2anc 584	. . . 4 ⊢ (𝜑 → (exp‘(Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴))) = ((exp‘Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) / (exp‘(log‘𝐴))))
62	16, 17, 29, 51, 56	iprodefisum 34434	. . . . . 6 ⊢ (𝜑 → ∏𝑘 ∈ ℕ (exp‘((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = (exp‘Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))))
63		efsub 16008	. . . . . . . . 9 ⊢ (((𝐴 · (log‘((𝑘 + 1) / 𝑘))) ∈ ℂ ∧ (log‘((𝐴 / 𝑘) + 1)) ∈ ℂ) → (exp‘((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = ((exp‘(𝐴 · (log‘((𝑘 + 1) / 𝑘)))) / (exp‘(log‘((𝐴 / 𝑘) + 1)))))
64	43, 50, 63	syl2anc 584	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = ((exp‘(𝐴 · (log‘((𝑘 + 1) / 𝑘)))) / (exp‘(log‘((𝐴 / 𝑘) + 1)))))
65	36, 45, 36, 38	divdird 11993	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) / 𝑘) = ((𝑘 / 𝑘) + (1 / 𝑘)))
66	36, 38	dividd 11953	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 / 𝑘) = 1)
67	66	oveq1d 7392	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 / 𝑘) + (1 / 𝑘)) = (1 + (1 / 𝑘)))
68	65, 67	eqtrd 2771	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑘 + 1) / 𝑘) = (1 + (1 / 𝑘)))
69	68	fveq2d 6866	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (log‘((𝑘 + 1) / 𝑘)) = (log‘(1 + (1 / 𝑘))))
70	69	oveq2d 7393	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐴 · (log‘((𝑘 + 1) / 𝑘))) = (𝐴 · (log‘(1 + (1 / 𝑘)))))
71	70	fveq2d 6866	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘(𝐴 · (log‘((𝑘 + 1) / 𝑘)))) = (exp‘(𝐴 · (log‘(1 + (1 / 𝑘))))))
72		1rp 12943	. . . . . . . . . . . . . 14 ⊢ 1 ∈ ℝ⁺
73	72	a1i 11	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 1 ∈ ℝ⁺)
74	48	nnrpd 12979	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℝ⁺)
75	74	rpreccld 12991	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 / 𝑘) ∈ ℝ⁺)
76	73, 75	rpaddcld 12996	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 + (1 / 𝑘)) ∈ ℝ⁺)
77	76	rpcnd 12983	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 + (1 / 𝑘)) ∈ ℂ)
78	76	rpne0d 12986	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 + (1 / 𝑘)) ≠ 0)
79	77, 78, 31	cxpefd 26119	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((1 + (1 / 𝑘))↑_𝑐𝐴) = (exp‘(𝐴 · (log‘(1 + (1 / 𝑘))))))
80	71, 79	eqtr4d 2774	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘(𝐴 · (log‘((𝑘 + 1) / 𝑘)))) = ((1 + (1 / 𝑘))↑_𝑐𝐴))
81		eflog 25984	. . . . . . . . . . 11 ⊢ ((((𝐴 / 𝑘) + 1) ∈ ℂ ∧ ((𝐴 / 𝑘) + 1) ≠ 0) → (exp‘(log‘((𝐴 / 𝑘) + 1))) = ((𝐴 / 𝑘) + 1))
82	46, 49, 81	syl2anc 584	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘(log‘((𝐴 / 𝑘) + 1))) = ((𝐴 / 𝑘) + 1))
83	44, 45	addcomd 11381	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴 / 𝑘) + 1) = (1 + (𝐴 / 𝑘)))
84	82, 83	eqtrd 2771	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘(log‘((𝐴 / 𝑘) + 1))) = (1 + (𝐴 / 𝑘)))
85	80, 84	oveq12d 7395	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((exp‘(𝐴 · (log‘((𝑘 + 1) / 𝑘)))) / (exp‘(log‘((𝐴 / 𝑘) + 1)))) = (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))))
86	64, 85	eqtrd 2771	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (exp‘((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))))
87	86	prodeq2dv 15832	. . . . . 6 ⊢ (𝜑 → ∏𝑘 ∈ ℕ (exp‘((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = ∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))))
88	62, 87	eqtr3d 2773	. . . . 5 ⊢ (𝜑 → (exp‘Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) = ∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))))
89		eflog 25984	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (exp‘(log‘𝐴)) = 𝐴)
90	30, 58, 89	syl2anc 584	. . . . 5 ⊢ (𝜑 → (exp‘(log‘𝐴)) = 𝐴)
91	88, 90	oveq12d 7395	. . . 4 ⊢ (𝜑 → ((exp‘Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1)))) / (exp‘(log‘𝐴))) = (∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))) / 𝐴))
92	61, 91	eqtrd 2771	. . 3 ⊢ (𝜑 → (exp‘(Σ𝑘 ∈ ℕ ((𝐴 · (log‘((𝑘 + 1) / 𝑘))) − (log‘((𝐴 / 𝑘) + 1))) − (log‘𝐴))) = (∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))) / 𝐴))
93	15, 92	eqtrd 2771	. 2 ⊢ (𝜑 → (exp‘(log Γ‘𝐴)) = (∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))) / 𝐴))
94	3, 93	eqtr3d 2773	1 ⊢ (𝜑 → (Γ‘𝐴) = (∏𝑘 ∈ ℕ (((1 + (1 / 𝑘))↑_𝑐𝐴) / (1 + (𝐴 / 𝑘))) / 𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ≠ wne 2939 ∖ cdif 3925 class class class wbr 5125 ↦ cmpt 5208 dom cdm 5653 ‘cfv 6516 (class class class)co 7377 ℂcc 11073 0cc0 11075 1c1 11076 + caddc 11078 · cmul 11080 − cmin 11409 / cdiv 11836 ℕcn 12177 ℤcz 12523 ℝ⁺crp 12939 seqcseq 13931 ⇝ cli 15393 Σcsu 15597 ∏cprod 15814 expce 15970 logclog 25962 ↑_𝑐ccxp 25963 log Γclgam 26417 Γcgam 26418

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2702 ax-rep 5262 ax-sep 5276 ax-nul 5283 ax-pow 5340 ax-pr 5404 ax-un 7692 ax-inf2 9601 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 ax-addf 11154 ax-mulf 11155

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3364 df-reu 3365 df-rab 3419 df-v 3461 df-sbc 3758 df-csb 3874 df-dif 3931 df-un 3933 df-in 3935 df-ss 3945 df-pss 3947 df-nul 4303 df-if 4507 df-pw 4582 df-sn 4607 df-pr 4609 df-tp 4611 df-op 4613 df-uni 4886 df-int 4928 df-iun 4976 df-iin 4977 df-br 5126 df-opab 5188 df-mpt 5209 df-tr 5243 df-id 5551 df-eprel 5557 df-po 5565 df-so 5566 df-fr 5608 df-se 5609 df-we 5610 df-xp 5659 df-rel 5660 df-cnv 5661 df-co 5662 df-dm 5663 df-rn 5664 df-res 5665 df-ima 5666 df-pred 6273 df-ord 6340 df-on 6341 df-lim 6342 df-suc 6343 df-iota 6468 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-isom 6525 df-riota 7333 df-ov 7380 df-oprab 7381 df-mpo 7382 df-of 7637 df-om 7823 df-1st 7941 df-2nd 7942 df-supp 8113 df-frecs 8232 df-wrecs 8263 df-recs 8337 df-rdg 8376 df-1o 8432 df-2o 8433 df-oadd 8436 df-er 8670 df-map 8789 df-pm 8790 df-ixp 8858 df-en 8906 df-dom 8907 df-sdom 8908 df-fin 8909 df-fsupp 9328 df-fi 9371 df-sup 9402 df-inf 9403 df-oi 9470 df-dju 9861 df-card 9899 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11411 df-neg 11412 df-div 11837 df-nn 12178 df-2 12240 df-3 12241 df-4 12242 df-5 12243 df-6 12244 df-7 12245 df-8 12246 df-9 12247 df-n0 12438 df-z 12524 df-dec 12643 df-uz 12788 df-q 12898 df-rp 12940 df-xneg 13057 df-xadd 13058 df-xmul 13059 df-ioo 13293 df-ioc 13294 df-ico 13295 df-icc 13296 df-fz 13450 df-fzo 13593 df-fl 13722 df-mod 13800 df-seq 13932 df-exp 13993 df-fac 14199 df-bc 14228 df-hash 14256 df-shft 14979 df-cj 15011 df-re 15012 df-im 15013 df-sqrt 15147 df-abs 15148 df-limsup 15380 df-clim 15397 df-rlim 15398 df-sum 15598 df-prod 15815 df-ef 15976 df-sin 15978 df-cos 15979 df-tan 15980 df-pi 15981 df-struct 17045 df-sets 17062 df-slot 17080 df-ndx 17092 df-base 17110 df-ress 17139 df-plusg 17175 df-mulr 17176 df-starv 17177 df-sca 17178 df-vsca 17179 df-ip 17180 df-tset 17181 df-ple 17182 df-ds 17184 df-unif 17185 df-hom 17186 df-cco 17187 df-rest 17333 df-topn 17334 df-0g 17352 df-gsum 17353 df-topgen 17354 df-pt 17355 df-prds 17358 df-xrs 17413 df-qtop 17418 df-imas 17419 df-xps 17421 df-mre 17495 df-mrc 17496 df-acs 17498 df-mgm 18526 df-sgrp 18575 df-mnd 18586 df-submnd 18631 df-mulg 18902 df-cntz 19126 df-cmn 19593 df-psmet 20840 df-xmet 20841 df-met 20842 df-bl 20843 df-mopn 20844 df-fbas 20845 df-fg 20846 df-cnfld 20849 df-top 22295 df-topon 22312 df-topsp 22334 df-bases 22348 df-cld 22422 df-ntr 22423 df-cls 22424 df-nei 22501 df-lp 22539 df-perf 22540 df-cn 22630 df-cnp 22631 df-haus 22718 df-cmp 22790 df-tx 22965 df-hmeo 23158 df-fil 23249 df-fm 23341 df-flim 23342 df-flf 23343 df-xms 23725 df-ms 23726 df-tms 23727 df-cncf 24293 df-limc 25282 df-dv 25283 df-ulm 25788 df-log 25964 df-cxp 25965 df-lgam 26420 df-gam 26421

This theorem is referenced by: (None)

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