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Theorem ang180lem2 26658

Description: Lemma for ang180 26662. Show that the revolution number 𝑁 is strictly between -2 and 1. Both bounds are established by iterating using the bounds on the imaginary part of the logarithm, logimcl 26420, but the resulting bound gives only 𝑁 ≤ 1 for the upper bound. The case 𝑁 = 1 is not ruled out here, but it is in some sense an "edge case" that can only happen under very specific conditions; in particular we show that all the angle arguments 𝐴, 1 / (1 − 𝐴), (𝐴 − 1) / 𝐴 must lie on the negative real axis, which is a contradiction because clearly if 𝐴 is negative then the other two are positive real. (Contributed by Mario Carneiro, 23-Sep-2014.)

**Hypotheses**
Ref	Expression
ang.1	⊢ 𝐹 = (𝑥 ∈ (ℂ ∖ {0}), 𝑦 ∈ (ℂ ∖ {0}) ↦ (ℑ‘(log‘(𝑦 / 𝑥))))
ang180lem1.2	⊢ 𝑇 = (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))
ang180lem1.3	⊢ 𝑁 = (((𝑇 / i) / (2 · π)) − (1 / 2))

**Assertion**
Ref	Expression
ang180lem2	⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-2 < 𝑁 ∧ 𝑁 < 1))

Distinct variable group: 𝑥,𝑦,𝐴 Allowed substitution hints: 𝑇(𝑥,𝑦) 𝐹(𝑥,𝑦) 𝑁(𝑥,𝑦)

**Proof of Theorem ang180lem2**
Step	Hyp	Ref	Expression
1		2cn 12284	. . . . . . 7 ⊢ 2 ∈ ℂ
2		1re 11211	. . . . . . . . 9 ⊢ 1 ∈ ℝ
3	2	rehalfcli 12458	. . . . . . . 8 ⊢ (1 / 2) ∈ ℝ
4	3	recni 11225	. . . . . . 7 ⊢ (1 / 2) ∈ ℂ
5	1, 4	negsubdii 11542	. . . . . 6 ⊢ -(2 − (1 / 2)) = (-2 + (1 / 2))
6		4d2e2 12379	. . . . . . . . 9 ⊢ (4 / 2) = 2
7	6	oveq1i 7411	. . . . . . . 8 ⊢ ((4 / 2) − (1 / 2)) = (2 − (1 / 2))
8		4cn 12294	. . . . . . . . . 10 ⊢ 4 ∈ ℂ
9		ax-1cn 11164	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
10		2cnne0 12419	. . . . . . . . . 10 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0)
11		divsubdir 11905	. . . . . . . . . 10 ⊢ ((4 ∈ ℂ ∧ 1 ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((4 − 1) / 2) = ((4 / 2) − (1 / 2)))
12	8, 9, 10, 11	mp3an 1457	. . . . . . . . 9 ⊢ ((4 − 1) / 2) = ((4 / 2) − (1 / 2))
13		4m1e3 12338	. . . . . . . . . 10 ⊢ (4 − 1) = 3
14	13	oveq1i 7411	. . . . . . . . 9 ⊢ ((4 − 1) / 2) = (3 / 2)
15	12, 14	eqtr3i 2754	. . . . . . . 8 ⊢ ((4 / 2) − (1 / 2)) = (3 / 2)
16	7, 15	eqtr3i 2754	. . . . . . 7 ⊢ (2 − (1 / 2)) = (3 / 2)
17	16	negeqi 11450	. . . . . 6 ⊢ -(2 − (1 / 2)) = -(3 / 2)
18	5, 17	eqtr3i 2754	. . . . 5 ⊢ (-2 + (1 / 2)) = -(3 / 2)
19		3re 12289	. . . . . . . . . . . . 13 ⊢ 3 ∈ ℝ
20	19	rehalfcli 12458	. . . . . . . . . . . 12 ⊢ (3 / 2) ∈ ℝ
21	20	recni 11225	. . . . . . . . . . 11 ⊢ (3 / 2) ∈ ℂ
22		picn 26311	. . . . . . . . . . 11 ⊢ π ∈ ℂ
23	21, 1, 22	mulassi 11222	. . . . . . . . . 10 ⊢ (((3 / 2) · 2) · π) = ((3 / 2) · (2 · π))
24		3cn 12290	. . . . . . . . . . . 12 ⊢ 3 ∈ ℂ
25		2ne0 12313	. . . . . . . . . . . 12 ⊢ 2 ≠ 0
26	24, 1, 25	divcan1i 11955	. . . . . . . . . . 11 ⊢ ((3 / 2) · 2) = 3
27	26	oveq1i 7411	. . . . . . . . . 10 ⊢ (((3 / 2) · 2) · π) = (3 · π)
28	23, 27	eqtr3i 2754	. . . . . . . . 9 ⊢ ((3 / 2) · (2 · π)) = (3 · π)
29	28	negeqi 11450	. . . . . . . 8 ⊢ -((3 / 2) · (2 · π)) = -(3 · π)
30		2re 12283	. . . . . . . . . . 11 ⊢ 2 ∈ ℝ
31		pire 26310	. . . . . . . . . . 11 ⊢ π ∈ ℝ
32	30, 31	remulcli 11227	. . . . . . . . . 10 ⊢ (2 · π) ∈ ℝ
33	32	recni 11225	. . . . . . . . 9 ⊢ (2 · π) ∈ ℂ
34	21, 33	mulneg1i 11657	. . . . . . . 8 ⊢ (-(3 / 2) · (2 · π)) = -((3 / 2) · (2 · π))
35	24, 22	mulneg2i 11658	. . . . . . . 8 ⊢ (3 · -π) = -(3 · π)
36	29, 34, 35	3eqtr4i 2762	. . . . . . 7 ⊢ (-(3 / 2) · (2 · π)) = (3 · -π)
37	31	renegcli 11518	. . . . . . . . . . . 12 ⊢ -π ∈ ℝ
38	30, 37	remulcli 11227	. . . . . . . . . . 11 ⊢ (2 · -π) ∈ ℝ
39	38	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · -π) ∈ ℝ)
40	37	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -π ∈ ℝ)
41		simp1 1133	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ∈ ℂ)
42		subcl 11456	. . . . . . . . . . . . . . 15 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 − 𝐴) ∈ ℂ)
43	9, 41, 42	sylancr 586	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 − 𝐴) ∈ ℂ)
44		simp3 1135	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ≠ 1)
45	44	necomd 2988	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 1 ≠ 𝐴)
46		subeq0 11483	. . . . . . . . . . . . . . . . 17 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴))
47	9, 41, 46	sylancr 586	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴))
48	47	necon3bid 2977	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 − 𝐴) ≠ 0 ↔ 1 ≠ 𝐴))
49	45, 48	mpbird 257	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 − 𝐴) ≠ 0)
50	43, 49	reccld 11980	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ∈ ℂ)
51	43, 49	recne0d 11981	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ≠ 0)
52	50, 51	logcld 26421	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘(1 / (1 − 𝐴))) ∈ ℂ)
53		subcl 11456	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ)
54	41, 9, 53	sylancl 585	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝐴 − 1) ∈ ℂ)
55		simp2 1134	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ≠ 0)
56	54, 41, 55	divcld 11987	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ∈ ℂ)
57		subeq0 11483	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1))
58	41, 9, 57	sylancl 585	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1))
59	58	necon3bid 2977	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) ≠ 0 ↔ 𝐴 ≠ 1))
60	44, 59	mpbird 257	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝐴 − 1) ≠ 0)
61	54, 41, 60, 55	divne0d 12003	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ≠ 0)
62	56, 61	logcld 26421	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘((𝐴 − 1) / 𝐴)) ∈ ℂ)
63	52, 62	addcld 11230	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℂ)
64	63	imcld 15139	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℝ)
65		logcl 26419	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (log‘𝐴) ∈ ℂ)
66	65	3adant3 1129	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘𝐴) ∈ ℂ)
67	66	imcld 15139	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘𝐴)) ∈ ℝ)
68	52	imcld 15139	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘(1 / (1 − 𝐴)))) ∈ ℝ)
69	62	imcld 15139	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘((𝐴 − 1) / 𝐴))) ∈ ℝ)
70	50, 51	logimcld 26422	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-π < (ℑ‘(log‘(1 / (1 − 𝐴)))) ∧ (ℑ‘(log‘(1 / (1 − 𝐴)))) ≤ π))
71	70	simpld 494	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -π < (ℑ‘(log‘(1 / (1 − 𝐴)))))
72	56, 61	logimcld 26422	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-π < (ℑ‘(log‘((𝐴 − 1) / 𝐴))) ∧ (ℑ‘(log‘((𝐴 − 1) / 𝐴))) ≤ π))
73	72	simpld 494	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -π < (ℑ‘(log‘((𝐴 − 1) / 𝐴))))
74	40, 40, 68, 69, 71, 73	lt2addd 11834	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-π + -π) < ((ℑ‘(log‘(1 / (1 − 𝐴)))) + (ℑ‘(log‘((𝐴 − 1) / 𝐴)))))
75		negpicn 26314	. . . . . . . . . . . . 13 ⊢ -π ∈ ℂ
76	75	2timesi 12347	. . . . . . . . . . . 12 ⊢ (2 · -π) = (-π + -π)
77	76	a1i 11	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · -π) = (-π + -π))
78	52, 62	imaddd 15159	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = ((ℑ‘(log‘(1 / (1 − 𝐴)))) + (ℑ‘(log‘((𝐴 − 1) / 𝐴)))))
79	74, 77, 78	3brtr4d 5170	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · -π) < (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))))
80		logimcl 26420	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (-π < (ℑ‘(log‘𝐴)) ∧ (ℑ‘(log‘𝐴)) ≤ π))
81	80	3adant3 1129	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-π < (ℑ‘(log‘𝐴)) ∧ (ℑ‘(log‘𝐴)) ≤ π))
82	81	simpld 494	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -π < (ℑ‘(log‘𝐴)))
83	39, 40, 64, 67, 79, 82	lt2addd 11834	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((2 · -π) + -π) < ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))))
84		df-3 12273	. . . . . . . . . . . 12 ⊢ 3 = (2 + 1)
85	84	oveq1i 7411	. . . . . . . . . . 11 ⊢ (3 · -π) = ((2 + 1) · -π)
86	1, 9, 75	adddiri 11224	. . . . . . . . . . 11 ⊢ ((2 + 1) · -π) = ((2 · -π) + (1 · -π))
87	75	mullidi 11216	. . . . . . . . . . . 12 ⊢ (1 · -π) = -π
88	87	oveq2i 7412	. . . . . . . . . . 11 ⊢ ((2 · -π) + (1 · -π)) = ((2 · -π) + -π)
89	85, 86, 88	3eqtri 2756	. . . . . . . . . 10 ⊢ (3 · -π) = ((2 · -π) + -π)
90	89	a1i 11	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · -π) = ((2 · -π) + -π))
91		ang180lem1.2	. . . . . . . . . . 11 ⊢ 𝑇 = (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))
92	91	fveq2i 6884	. . . . . . . . . 10 ⊢ (ℑ‘𝑇) = (ℑ‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)))
93	63, 66	imaddd 15159	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))) = ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))))
94	92, 93	eqtrid 2776	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘𝑇) = ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))))
95	83, 90, 94	3brtr4d 5170	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · -π) < (ℑ‘𝑇))
96	63, 66	addcld 11230	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)) ∈ ℂ)
97	91, 96	eqeltrid 2829	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑇 ∈ ℂ)
98		imval 15051	. . . . . . . . . 10 ⊢ (𝑇 ∈ ℂ → (ℑ‘𝑇) = (ℜ‘(𝑇 / i)))
99	97, 98	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘𝑇) = (ℜ‘(𝑇 / i)))
100		ang.1	. . . . . . . . . . . 12 ⊢ 𝐹 = (𝑥 ∈ (ℂ ∖ {0}), 𝑦 ∈ (ℂ ∖ {0}) ↦ (ℑ‘(log‘(𝑦 / 𝑥))))
101		ang180lem1.3	. . . . . . . . . . . 12 ⊢ 𝑁 = (((𝑇 / i) / (2 · π)) − (1 / 2))
102	100, 91, 101	ang180lem1 26657	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑁 ∈ ℤ ∧ (𝑇 / i) ∈ ℝ))
103	102	simprd 495	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ∈ ℝ)
104	103	rered 15168	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℜ‘(𝑇 / i)) = (𝑇 / i))
105	99, 104	eqtrd 2764	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘𝑇) = (𝑇 / i))
106	95, 105	breqtrd 5164	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · -π) < (𝑇 / i))
107	36, 106	eqbrtrid 5173	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(3 / 2) · (2 · π)) < (𝑇 / i))
108	20	renegcli 11518	. . . . . . . 8 ⊢ -(3 / 2) ∈ ℝ
109	108	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -(3 / 2) ∈ ℝ)
110	32	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ∈ ℝ)
111		2pos 12312	. . . . . . . . 9 ⊢ 0 < 2
112		pipos 26312	. . . . . . . . 9 ⊢ 0 < π
113	30, 31, 111, 112	mulgt0ii 11344	. . . . . . . 8 ⊢ 0 < (2 · π)
114	113	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 0 < (2 · π))
115		ltmuldiv 12084	. . . . . . 7 ⊢ ((-(3 / 2) ∈ ℝ ∧ (𝑇 / i) ∈ ℝ ∧ ((2 · π) ∈ ℝ ∧ 0 < (2 · π))) → ((-(3 / 2) · (2 · π)) < (𝑇 / i) ↔ -(3 / 2) < ((𝑇 / i) / (2 · π))))
116	109, 103, 110, 114, 115	syl112anc 1371	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((-(3 / 2) · (2 · π)) < (𝑇 / i) ↔ -(3 / 2) < ((𝑇 / i) / (2 · π))))
117	107, 116	mpbid 231	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -(3 / 2) < ((𝑇 / i) / (2 · π)))
118	18, 117	eqbrtrid 5173	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-2 + (1 / 2)) < ((𝑇 / i) / (2 · π)))
119	30	renegcli 11518	. . . . . 6 ⊢ -2 ∈ ℝ
120	119	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -2 ∈ ℝ)
121	3	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / 2) ∈ ℝ)
122	32, 113	gt0ne0ii 11747	. . . . . . 7 ⊢ (2 · π) ≠ 0
123	122	a1i 11	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ≠ 0)
124	103, 110, 123	redivcld 12039	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) ∈ ℝ)
125	120, 121, 124	ltaddsubd 11811	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((-2 + (1 / 2)) < ((𝑇 / i) / (2 · π)) ↔ -2 < (((𝑇 / i) / (2 · π)) − (1 / 2))))
126	118, 125	mpbid 231	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -2 < (((𝑇 / i) / (2 · π)) − (1 / 2)))
127	126, 101	breqtrrdi 5180	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -2 < 𝑁)
128	31	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → π ∈ ℝ)
129	70	simprd 495	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘(1 / (1 − 𝐴)))) ≤ π)
130	72	simprd 495	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘((𝐴 − 1) / 𝐴))) ≤ π)
131	68, 69, 128, 128, 129, 130	le2addd 11830	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((ℑ‘(log‘(1 / (1 − 𝐴)))) + (ℑ‘(log‘((𝐴 − 1) / 𝐴)))) ≤ (π + π))
132	22	2timesi 12347	. . . . . . . . . . . 12 ⊢ (2 · π) = (π + π)
133	132	a1i 11	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) = (π + π))
134	131, 78, 133	3brtr4d 5170	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ≤ (2 · π))
135	81	simprd 495	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘𝐴)) ≤ π)
136	64, 67, 110, 128, 134, 135	le2addd 11830	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))) ≤ ((2 · π) + π))
137	105, 94	eqtr3d 2766	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) = ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))))
138	84	oveq1i 7411	. . . . . . . . . . 11 ⊢ (3 · π) = ((2 + 1) · π)
139	1, 9, 22	adddiri 11224	. . . . . . . . . . 11 ⊢ ((2 + 1) · π) = ((2 · π) + (1 · π))
140	22	mullidi 11216	. . . . . . . . . . . 12 ⊢ (1 · π) = π
141	140	oveq2i 7412	. . . . . . . . . . 11 ⊢ ((2 · π) + (1 · π)) = ((2 · π) + π)
142	138, 139, 141	3eqtri 2756	. . . . . . . . . 10 ⊢ (3 · π) = ((2 · π) + π)
143	142	a1i 11	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · π) = ((2 · π) + π))
144	136, 137, 143	3brtr4d 5170	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ≤ (3 · π))
145	33	subid1i 11529	. . . . . . . . . 10 ⊢ ((2 · π) − 0) = (2 · π)
146	145, 122	eqnetri 3003	. . . . . . . . 9 ⊢ ((2 · π) − 0) ≠ 0
147		negsub 11505	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 + -𝐴) = (1 − 𝐴))
148	9, 41, 147	sylancr 586	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 + -𝐴) = (1 − 𝐴))
149	148	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 + -𝐴) = (1 − 𝐴))
150		1rp 12975	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 ∈ ℝ⁺
151	143, 137	oveq12d 7419	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((3 · π) − (𝑇 / i)) = (((2 · π) + π) − ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴)))))
152	33	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ∈ ℂ)
153	22	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → π ∈ ℂ)
154	64	recnd 11239	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℂ)
155	67	recnd 11239	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘𝐴)) ∈ ℂ)
156	152, 153, 154, 155	addsub4d 11615	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((2 · π) + π) − ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴)))) = (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))))
157	151, 156	eqtrd 2764	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((3 · π) − (𝑇 / i)) = (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))))
158	157	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((3 · π) − (𝑇 / i)) = (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))))
159	19, 31	remulcli 11227	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (3 · π) ∈ ℝ
160	159	recni 11225	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (3 · π) ∈ ℂ
161		ax-icn 11165	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ i ∈ ℂ
162	161	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ∈ ℂ)
163		ine0 11646	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ i ≠ 0
164	163	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ≠ 0)
165	97, 162, 164	divcld 11987	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ∈ ℂ)
166		subeq0 11483	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((3 · π) ∈ ℂ ∧ (𝑇 / i) ∈ ℂ) → (((3 · π) − (𝑇 / i)) = 0 ↔ (3 · π) = (𝑇 / i)))
167	160, 165, 166	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((3 · π) − (𝑇 / i)) = 0 ↔ (3 · π) = (𝑇 / i)))
168	167	biimpar 477	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((3 · π) − (𝑇 / i)) = 0)
169	158, 168	eqtr3d 2766	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))) = 0)
170		resubcl 11521	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((2 · π) ∈ ℝ ∧ (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℝ) → ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) ∈ ℝ)
171	32, 64, 170	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) ∈ ℝ)
172		subge0 11724	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((2 · π) ∈ ℝ ∧ (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℝ) → (0 ≤ ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) ↔ (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ≤ (2 · π)))
173	32, 64, 172	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (0 ≤ ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) ↔ (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ≤ (2 · π)))
174	134, 173	mpbird 257	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 0 ≤ ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))))
175		resubcl 11521	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((π ∈ ℝ ∧ (ℑ‘(log‘𝐴)) ∈ ℝ) → (π − (ℑ‘(log‘𝐴))) ∈ ℝ)
176	31, 67, 175	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (π − (ℑ‘(log‘𝐴))) ∈ ℝ)
177		subge0 11724	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((π ∈ ℝ ∧ (ℑ‘(log‘𝐴)) ∈ ℝ) → (0 ≤ (π − (ℑ‘(log‘𝐴))) ↔ (ℑ‘(log‘𝐴)) ≤ π))
178	31, 67, 177	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (0 ≤ (π − (ℑ‘(log‘𝐴))) ↔ (ℑ‘(log‘𝐴)) ≤ π))
179	135, 178	mpbird 257	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 0 ≤ (π − (ℑ‘(log‘𝐴))))
180		add20 11723	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) ∈ ℝ ∧ 0 ≤ ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))))) ∧ ((π − (ℑ‘(log‘𝐴))) ∈ ℝ ∧ 0 ≤ (π − (ℑ‘(log‘𝐴))))) → ((((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))) = 0 ↔ (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = 0 ∧ (π − (ℑ‘(log‘𝐴))) = 0)))
181	171, 174, 176, 179, 180	syl22anc 836	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))) = 0 ↔ (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = 0 ∧ (π − (ℑ‘(log‘𝐴))) = 0)))
182	181	biimpa 476	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) + (π − (ℑ‘(log‘𝐴)))) = 0) → (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = 0 ∧ (π − (ℑ‘(log‘𝐴))) = 0))
183	169, 182	syldan 590	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = 0 ∧ (π − (ℑ‘(log‘𝐴))) = 0))
184	183	simprd 495	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (π − (ℑ‘(log‘𝐴))) = 0)
185	155	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (ℑ‘(log‘𝐴)) ∈ ℂ)
186		subeq0 11483	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((π ∈ ℂ ∧ (ℑ‘(log‘𝐴)) ∈ ℂ) → ((π − (ℑ‘(log‘𝐴))) = 0 ↔ π = (ℑ‘(log‘𝐴))))
187	22, 185, 186	sylancr 586	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((π − (ℑ‘(log‘𝐴))) = 0 ↔ π = (ℑ‘(log‘𝐴))))
188	184, 187	mpbid 231	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → π = (ℑ‘(log‘𝐴)))
189	188	eqcomd 2730	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (ℑ‘(log‘𝐴)) = π)
190		lognegb 26440	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (-𝐴 ∈ ℝ⁺ ↔ (ℑ‘(log‘𝐴)) = π))
191	190	3adant3 1129	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-𝐴 ∈ ℝ⁺ ↔ (ℑ‘(log‘𝐴)) = π))
192	191	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (-𝐴 ∈ ℝ⁺ ↔ (ℑ‘(log‘𝐴)) = π))
193	189, 192	mpbird 257	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → -𝐴 ∈ ℝ⁺)
194		rpaddcl 12993	. . . . . . . . . . . . . . . . . . 19 ⊢ ((1 ∈ ℝ⁺ ∧ -𝐴 ∈ ℝ⁺) → (1 + -𝐴) ∈ ℝ⁺)
195	150, 193, 194	sylancr 586	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 + -𝐴) ∈ ℝ⁺)
196	149, 195	eqeltrrd 2826	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 − 𝐴) ∈ ℝ⁺)
197	196	rpreccld 13023	. . . . . . . . . . . . . . . 16 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 / (1 − 𝐴)) ∈ ℝ⁺)
198	197	relogcld 26473	. . . . . . . . . . . . . . 15 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (log‘(1 / (1 − 𝐴))) ∈ ℝ)
199		negsubdi2 11516	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → -(𝐴 − 1) = (1 − 𝐴))
200	41, 9, 199	sylancl 585	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -(𝐴 − 1) = (1 − 𝐴))
201	200	oveq1d 7416	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(𝐴 − 1) / -𝐴) = ((1 − 𝐴) / -𝐴))
202	54, 41, 55	div2negd 12002	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(𝐴 − 1) / -𝐴) = ((𝐴 − 1) / 𝐴))
203	201, 202	eqtr3d 2766	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 − 𝐴) / -𝐴) = ((𝐴 − 1) / 𝐴))
204	203	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((1 − 𝐴) / -𝐴) = ((𝐴 − 1) / 𝐴))
205	196, 193	rpdivcld 13030	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((1 − 𝐴) / -𝐴) ∈ ℝ⁺)
206	204, 205	eqeltrrd 2826	. . . . . . . . . . . . . . . 16 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((𝐴 − 1) / 𝐴) ∈ ℝ⁺)
207	206	relogcld 26473	. . . . . . . . . . . . . . 15 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (log‘((𝐴 − 1) / 𝐴)) ∈ ℝ)
208	198, 207	readdcld 11240	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℝ)
209	208	reim0d 15169	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = 0)
210	209	oveq2d 7417	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = ((2 · π) − 0))
211	183	simpld 494	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((2 · π) − (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))))) = 0)
212	210, 211	eqtr3d 2766	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((2 · π) − 0) = 0)
213	212	ex 412	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((3 · π) = (𝑇 / i) → ((2 · π) − 0) = 0))
214	213	necon3d 2953	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((2 · π) − 0) ≠ 0 → (3 · π) ≠ (𝑇 / i)))
215	146, 214	mpi 20	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · π) ≠ (𝑇 / i))
216		ltlen 11312	. . . . . . . . 9 ⊢ (((𝑇 / i) ∈ ℝ ∧ (3 · π) ∈ ℝ) → ((𝑇 / i) < (3 · π) ↔ ((𝑇 / i) ≤ (3 · π) ∧ (3 · π) ≠ (𝑇 / i))))
217	103, 159, 216	sylancl 585	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) < (3 · π) ↔ ((𝑇 / i) ≤ (3 · π) ∧ (3 · π) ≠ (𝑇 / i))))
218	144, 215, 217	mpbir2and 710	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) < (3 · π))
219	218, 28	breqtrrdi 5180	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) < ((3 / 2) · (2 · π)))
220	20	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 / 2) ∈ ℝ)
221		ltdivmul2 12088	. . . . . . 7 ⊢ (((𝑇 / i) ∈ ℝ ∧ (3 / 2) ∈ ℝ ∧ ((2 · π) ∈ ℝ ∧ 0 < (2 · π))) → (((𝑇 / i) / (2 · π)) < (3 / 2) ↔ (𝑇 / i) < ((3 / 2) · (2 · π))))
222	103, 220, 110, 114, 221	syl112anc 1371	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝑇 / i) / (2 · π)) < (3 / 2) ↔ (𝑇 / i) < ((3 / 2) · (2 · π))))
223	219, 222	mpbird 257	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) < (3 / 2))
224	84	oveq1i 7411	. . . . . 6 ⊢ (3 / 2) = ((2 + 1) / 2)
225	1, 9, 1, 25	divdiri 11968	. . . . . 6 ⊢ ((2 + 1) / 2) = ((2 / 2) + (1 / 2))
226		2div2e1 12350	. . . . . . 7 ⊢ (2 / 2) = 1
227	226	oveq1i 7411	. . . . . 6 ⊢ ((2 / 2) + (1 / 2)) = (1 + (1 / 2))
228	224, 225, 227	3eqtri 2756	. . . . 5 ⊢ (3 / 2) = (1 + (1 / 2))
229	223, 228	breqtrdi 5179	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) < (1 + (1 / 2)))
230	2	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 1 ∈ ℝ)
231	124, 121, 230	ltsubaddd 11807	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((((𝑇 / i) / (2 · π)) − (1 / 2)) < 1 ↔ ((𝑇 / i) / (2 · π)) < (1 + (1 / 2))))
232	229, 231	mpbird 257	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝑇 / i) / (2 · π)) − (1 / 2)) < 1)
233	101, 232	eqbrtrid 5173	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑁 < 1)
234	127, 233	jca 511	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-2 < 𝑁 ∧ 𝑁 < 1))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2932 ∖ cdif 3937 {csn 4620 class class class wbr 5138 ‘cfv 6533 (class class class)co 7401 ∈ cmpo 7403 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 ici 11108 + caddc 11109 · cmul 11111 < clt 11245 ≤ cle 11246 − cmin 11441 -cneg 11442 / cdiv 11868 2c2 12264 3c3 12265 4c4 12266 ℤcz 12555 ℝ⁺crp 12971 ℜcre 15041 ℑcim 15042 πcpi 16007 logclog 26405

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-rep 5275 ax-sep 5289 ax-nul 5296 ax-pow 5353 ax-pr 5417 ax-un 7718 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

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3770 df-csb 3886 df-dif 3943 df-un 3945 df-in 3947 df-ss 3957 df-pss 3959 df-nul 4315 df-if 4521 df-pw 4596 df-sn 4621 df-pr 4623 df-tp 4625 df-op 4627 df-uni 4900 df-int 4941 df-iun 4989 df-iin 4990 df-br 5139 df-opab 5201 df-mpt 5222 df-tr 5256 df-id 5564 df-eprel 5570 df-po 5578 df-so 5579 df-fr 5621 df-se 5622 df-we 5623 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6290 df-ord 6357 df-on 6358 df-lim 6359 df-suc 6360 df-iota 6485 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7357 df-ov 7404 df-oprab 7405 df-mpo 7406 df-of 7663 df-om 7849 df-1st 7968 df-2nd 7969 df-supp 8141 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 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-div 11869 df-nn 12210 df-2 12272 df-3 12273 df-4 12274 df-5 12275 df-6 12276 df-7 12277 df-8 12278 df-9 12279 df-n0 12470 df-z 12556 df-dec 12675 df-uz 12820 df-q 12930 df-rp 12972 df-xneg 13089 df-xadd 13090 df-xmul 13091 df-ioo 13325 df-ioc 13326 df-ico 13327 df-icc 13328 df-fz 13482 df-fzo 13625 df-fl 13754 df-mod 13832 df-seq 13964 df-exp 14025 df-fac 14231 df-bc 14260 df-hash 14288 df-shft 15011 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-limsup 15412 df-clim 15429 df-rlim 15430 df-sum 15630 df-ef 16008 df-sin 16010 df-cos 16011 df-pi 16013 df-struct 17079 df-sets 17096 df-slot 17114 df-ndx 17126 df-base 17144 df-ress 17173 df-plusg 17209 df-mulr 17210 df-starv 17211 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-hom 17220 df-cco 17221 df-rest 17367 df-topn 17368 df-0g 17386 df-gsum 17387 df-topgen 17388 df-pt 17389 df-prds 17392 df-xrs 17447 df-qtop 17452 df-imas 17453 df-xps 17455 df-mre 17529 df-mrc 17530 df-acs 17532 df-mgm 18563 df-sgrp 18642 df-mnd 18658 df-submnd 18704 df-mulg 18986 df-cntz 19223 df-cmn 19692 df-psmet 21220 df-xmet 21221 df-met 21222 df-bl 21223 df-mopn 21224 df-fbas 21225 df-fg 21226 df-cnfld 21229 df-top 22718 df-topon 22735 df-topsp 22757 df-bases 22771 df-cld 22845 df-ntr 22846 df-cls 22847 df-nei 22924 df-lp 22962 df-perf 22963 df-cn 23053 df-cnp 23054 df-haus 23141 df-tx 23388 df-hmeo 23581 df-fil 23672 df-fm 23764 df-flim 23765 df-flf 23766 df-xms 24148 df-ms 24149 df-tms 24150 df-cncf 24720 df-limc 25717 df-dv 25718 df-log 26407

This theorem is referenced by: ang180lem3 26659

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