ang180lem2 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > ang180lem2		Structured version Visualization version GIF version

Theorem ang180lem2 26697

Description: Lemma for ang180 26701. 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 26458, 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 12291	. . . . . . 7 ⊢ 2 ∈ ℂ
2		1re 11218	. . . . . . . . 9 ⊢ 1 ∈ ℝ
3	2	rehalfcli 12465	. . . . . . . 8 ⊢ (1 / 2) ∈ ℝ
4	3	recni 11232	. . . . . . 7 ⊢ (1 / 2) ∈ ℂ
5	1, 4	negsubdii 11549	. . . . . 6 ⊢ -(2 − (1 / 2)) = (-2 + (1 / 2))
6		4d2e2 12386	. . . . . . . . 9 ⊢ (4 / 2) = 2
7	6	oveq1i 7415	. . . . . . . 8 ⊢ ((4 / 2) − (1 / 2)) = (2 − (1 / 2))
8		4cn 12301	. . . . . . . . . 10 ⊢ 4 ∈ ℂ
9		ax-1cn 11170	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
10		2cnne0 12426	. . . . . . . . . 10 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0)
11		divsubdir 11912	. . . . . . . . . 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 12345	. . . . . . . . . 10 ⊢ (4 − 1) = 3
14	13	oveq1i 7415	. . . . . . . . 9 ⊢ ((4 − 1) / 2) = (3 / 2)
15	12, 14	eqtr3i 2756	. . . . . . . 8 ⊢ ((4 / 2) − (1 / 2)) = (3 / 2)
16	7, 15	eqtr3i 2756	. . . . . . 7 ⊢ (2 − (1 / 2)) = (3 / 2)
17	16	negeqi 11457	. . . . . 6 ⊢ -(2 − (1 / 2)) = -(3 / 2)
18	5, 17	eqtr3i 2756	. . . . 5 ⊢ (-2 + (1 / 2)) = -(3 / 2)
19		3re 12296	. . . . . . . . . . . . 13 ⊢ 3 ∈ ℝ
20	19	rehalfcli 12465	. . . . . . . . . . . 12 ⊢ (3 / 2) ∈ ℝ
21	20	recni 11232	. . . . . . . . . . 11 ⊢ (3 / 2) ∈ ℂ
22		picn 26349	. . . . . . . . . . 11 ⊢ π ∈ ℂ
23	21, 1, 22	mulassi 11229	. . . . . . . . . 10 ⊢ (((3 / 2) · 2) · π) = ((3 / 2) · (2 · π))
24		3cn 12297	. . . . . . . . . . . 12 ⊢ 3 ∈ ℂ
25		2ne0 12320	. . . . . . . . . . . 12 ⊢ 2 ≠ 0
26	24, 1, 25	divcan1i 11962	. . . . . . . . . . 11 ⊢ ((3 / 2) · 2) = 3
27	26	oveq1i 7415	. . . . . . . . . 10 ⊢ (((3 / 2) · 2) · π) = (3 · π)
28	23, 27	eqtr3i 2756	. . . . . . . . 9 ⊢ ((3 / 2) · (2 · π)) = (3 · π)
29	28	negeqi 11457	. . . . . . . 8 ⊢ -((3 / 2) · (2 · π)) = -(3 · π)
30		2re 12290	. . . . . . . . . . 11 ⊢ 2 ∈ ℝ
31		pire 26348	. . . . . . . . . . 11 ⊢ π ∈ ℝ
32	30, 31	remulcli 11234	. . . . . . . . . 10 ⊢ (2 · π) ∈ ℝ
33	32	recni 11232	. . . . . . . . 9 ⊢ (2 · π) ∈ ℂ
34	21, 33	mulneg1i 11664	. . . . . . . 8 ⊢ (-(3 / 2) · (2 · π)) = -((3 / 2) · (2 · π))
35	24, 22	mulneg2i 11665	. . . . . . . 8 ⊢ (3 · -π) = -(3 · π)
36	29, 34, 35	3eqtr4i 2764	. . . . . . 7 ⊢ (-(3 / 2) · (2 · π)) = (3 · -π)
37	31	renegcli 11525	. . . . . . . . . . . 12 ⊢ -π ∈ ℝ
38	30, 37	remulcli 11234	. . . . . . . . . . 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 11463	. . . . . . . . . . . . . . 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 2990	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 1 ≠ 𝐴)
46		subeq0 11490	. . . . . . . . . . . . . . . . 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 2979	. . . . . . . . . . . . . . 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 11987	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ∈ ℂ)
51	43, 49	recne0d 11988	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ≠ 0)
52	50, 51	logcld 26459	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘(1 / (1 − 𝐴))) ∈ ℂ)
53		subcl 11463	. . . . . . . . . . . . . . 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 11994	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ∈ ℂ)
57		subeq0 11490	. . . . . . . . . . . . . . . . 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 2979	. . . . . . . . . . . . . . 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 12010	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ≠ 0)
62	56, 61	logcld 26459	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘((𝐴 − 1) / 𝐴)) ∈ ℂ)
63	52, 62	addcld 11237	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℂ)
64	63	imcld 15148	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℝ)
65		logcl 26457	. . . . . . . . . . . 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 15148	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘𝐴)) ∈ ℝ)
68	52	imcld 15148	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘(1 / (1 − 𝐴)))) ∈ ℝ)
69	62	imcld 15148	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘((𝐴 − 1) / 𝐴))) ∈ ℝ)
70	50, 51	logimcld 26460	. . . . . . . . . . . . 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 26460	. . . . . . . . . . . . 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 11841	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-π + -π) < ((ℑ‘(log‘(1 / (1 − 𝐴)))) + (ℑ‘(log‘((𝐴 − 1) / 𝐴)))))
75		negpicn 26352	. . . . . . . . . . . . 13 ⊢ -π ∈ ℂ
76	75	2timesi 12354	. . . . . . . . . . . 12 ⊢ (2 · -π) = (-π + -π)
77	76	a1i 11	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · -π) = (-π + -π))
78	52, 62	imaddd 15168	. . . . . . . . . . 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 5173	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · -π) < (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))))
80		logimcl 26458	. . . . . . . . . . . 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 11841	. . . . . . . . 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 12280	. . . . . . . . . . . 12 ⊢ 3 = (2 + 1)
85	84	oveq1i 7415	. . . . . . . . . . 11 ⊢ (3 · -π) = ((2 + 1) · -π)
86	1, 9, 75	adddiri 11231	. . . . . . . . . . 11 ⊢ ((2 + 1) · -π) = ((2 · -π) + (1 · -π))
87	75	mullidi 11223	. . . . . . . . . . . 12 ⊢ (1 · -π) = -π
88	87	oveq2i 7416	. . . . . . . . . . 11 ⊢ ((2 · -π) + (1 · -π)) = ((2 · -π) + -π)
89	85, 86, 88	3eqtri 2758	. . . . . . . . . 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 6888	. . . . . . . . . 10 ⊢ (ℑ‘𝑇) = (ℑ‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)))
93	63, 66	imaddd 15168	. . . . . . . . . 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 2778	. . . . . . . . 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 5173	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · -π) < (ℑ‘𝑇))
96	63, 66	addcld 11237	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)) ∈ ℂ)
97	91, 96	eqeltrid 2831	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑇 ∈ ℂ)
98		imval 15060	. . . . . . . . . 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 26696	. . . . . . . . . . 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 15177	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℜ‘(𝑇 / i)) = (𝑇 / i))
105	99, 104	eqtrd 2766	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘𝑇) = (𝑇 / i))
106	95, 105	breqtrd 5167	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (3 · -π) < (𝑇 / i))
107	36, 106	eqbrtrid 5176	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(3 / 2) · (2 · π)) < (𝑇 / i))
108	20	renegcli 11525	. . . . . . . 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 12319	. . . . . . . . 9 ⊢ 0 < 2
112		pipos 26350	. . . . . . . . 9 ⊢ 0 < π
113	30, 31, 111, 112	mulgt0ii 11351	. . . . . . . 8 ⊢ 0 < (2 · π)
114	113	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 0 < (2 · π))
115		ltmuldiv 12091	. . . . . . 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 5176	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-2 + (1 / 2)) < ((𝑇 / i) / (2 · π)))
119	30	renegcli 11525	. . . . . 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 11754	. . . . . . 7 ⊢ (2 · π) ≠ 0
123	122	a1i 11	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ≠ 0)
124	103, 110, 123	redivcld 12046	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) ∈ ℝ)
125	120, 121, 124	ltaddsubd 11818	. . . 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 5183	. 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 11837	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((ℑ‘(log‘(1 / (1 − 𝐴)))) + (ℑ‘(log‘((𝐴 − 1) / 𝐴)))) ≤ (π + π))
132	22	2timesi 12354	. . . . . . . . . . . 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 5173	. . . . . . . . . 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 11837	. . . . . . . . 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 2768	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) = ((ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) + (ℑ‘(log‘𝐴))))
138	84	oveq1i 7415	. . . . . . . . . . 11 ⊢ (3 · π) = ((2 + 1) · π)
139	1, 9, 22	adddiri 11231	. . . . . . . . . . 11 ⊢ ((2 + 1) · π) = ((2 · π) + (1 · π))
140	22	mullidi 11223	. . . . . . . . . . . 12 ⊢ (1 · π) = π
141	140	oveq2i 7416	. . . . . . . . . . 11 ⊢ ((2 · π) + (1 · π)) = ((2 · π) + π)
142	138, 139, 141	3eqtri 2758	. . . . . . . . . 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 5173	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ≤ (3 · π))
145	33	subid1i 11536	. . . . . . . . . 10 ⊢ ((2 · π) − 0) = (2 · π)
146	145, 122	eqnetri 3005	. . . . . . . . 9 ⊢ ((2 · π) − 0) ≠ 0
147		negsub 11512	. . . . . . . . . . . . . . . . . . . 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 12984	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 ∈ ℝ⁺
151	143, 137	oveq12d 7423	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 11246	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) ∈ ℂ)
155	67	recnd 11246	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (ℑ‘(log‘𝐴)) ∈ ℂ)
156	152, 153, 154, 155	addsub4d 11622	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 2766	. . . . . . . . . . . . . . . . . . . . . . . . . 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 11234	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (3 · π) ∈ ℝ
160	159	recni 11232	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (3 · π) ∈ ℂ
161		ax-icn 11171	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ i ∈ ℂ
162	161	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ∈ ℂ)
163		ine0 11653	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ i ≠ 0
164	163	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ≠ 0)
165	97, 162, 164	divcld 11994	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ∈ ℂ)
166		subeq0 11490	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 2768	. . . . . . . . . . . . . . . . . . . . . . . 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 11528	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 11731	. . . . . . . . . . . . . . . . . . . . . . . . . . . 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 11528	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 11731	. . . . . . . . . . . . . . . . . . . . . . . . . . . 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 11730	. . . . . . . . . . . . . . . . . . . . . . . . . 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 11490	. . . . . . . . . . . . . . . . . . . . . . 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 2732	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (ℑ‘(log‘𝐴)) = π)
190		lognegb 26479	. . . . . . . . . . . . . . . . . . . . . 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 13002	. . . . . . . . . . . . . . . . . . 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 2828	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 − 𝐴) ∈ ℝ⁺)
197	196	rpreccld 13032	. . . . . . . . . . . . . . . 16 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (1 / (1 − 𝐴)) ∈ ℝ⁺)
198	197	relogcld 26512	. . . . . . . . . . . . . . 15 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (log‘(1 / (1 − 𝐴))) ∈ ℝ)
199		negsubdi2 11523	. . . . . . . . . . . . . . . . . . . . 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 7420	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(𝐴 − 1) / -𝐴) = ((1 − 𝐴) / -𝐴))
202	54, 41, 55	div2negd 12009	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-(𝐴 − 1) / -𝐴) = ((𝐴 − 1) / 𝐴))
203	201, 202	eqtr3d 2768	. . . . . . . . . . . . . . . . . 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 13039	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((1 − 𝐴) / -𝐴) ∈ ℝ⁺)
206	204, 205	eqeltrrd 2828	. . . . . . . . . . . . . . . 16 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((𝐴 − 1) / 𝐴) ∈ ℝ⁺)
207	206	relogcld 26512	. . . . . . . . . . . . . . 15 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (log‘((𝐴 − 1) / 𝐴)) ∈ ℝ)
208	198, 207	readdcld 11247	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → ((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℝ)
209	208	reim0d 15178	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) ∧ (3 · π) = (𝑇 / i)) → (ℑ‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = 0)
210	209	oveq2d 7421	. . . . . . . . . . . 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 2768	. . . . . . . . . . 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 2955	. . . . . . . . 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 11319	. . . . . . . . 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 5183	. . . . . 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 12095	. . . . . . 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 7415	. . . . . 6 ⊢ (3 / 2) = ((2 + 1) / 2)
225	1, 9, 1, 25	divdiri 11975	. . . . . 6 ⊢ ((2 + 1) / 2) = ((2 / 2) + (1 / 2))
226		2div2e1 12357	. . . . . . 7 ⊢ (2 / 2) = 1
227	226	oveq1i 7415	. . . . . 6 ⊢ ((2 / 2) + (1 / 2)) = (1 + (1 / 2))
228	224, 225, 227	3eqtri 2758	. . . . 5 ⊢ (3 / 2) = (1 + (1 / 2))
229	223, 228	breqtrdi 5182	. . . 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 11814	. . . 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 5176	. 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 2934 ∖ cdif 3940 {csn 4623 class class class wbr 5141 ‘cfv 6537 (class class class)co 7405 ∈ cmpo 7407 ℂcc 11110 ℝcr 11111 0cc0 11112 1c1 11113 ici 11114 + caddc 11115 · cmul 11117 < clt 11252 ≤ cle 11253 − cmin 11448 -cneg 11449 / cdiv 11875 2c2 12271 3c3 12272 4c4 12273 ℤcz 12562 ℝ⁺crp 12980 ℜcre 15050 ℑcim 15051 πcpi 16016 logclog 26443

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 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191

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 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7667 df-om 7853 df-1st 7974 df-2nd 7975 df-supp 8147 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-2o 8468 df-er 8705 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12981 df-xneg 13098 df-xadd 13099 df-xmul 13100 df-ioo 13334 df-ioc 13335 df-ico 13336 df-icc 13337 df-fz 13491 df-fzo 13634 df-fl 13763 df-mod 13841 df-seq 13973 df-exp 14033 df-fac 14239 df-bc 14268 df-hash 14296 df-shft 15020 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-limsup 15421 df-clim 15438 df-rlim 15439 df-sum 15639 df-ef 16017 df-sin 16019 df-cos 16020 df-pi 16022 df-struct 17089 df-sets 17106 df-slot 17124 df-ndx 17136 df-base 17154 df-ress 17183 df-plusg 17219 df-mulr 17220 df-starv 17221 df-sca 17222 df-vsca 17223 df-ip 17224 df-tset 17225 df-ple 17226 df-ds 17228 df-unif 17229 df-hom 17230 df-cco 17231 df-rest 17377 df-topn 17378 df-0g 17396 df-gsum 17397 df-topgen 17398 df-pt 17399 df-prds 17402 df-xrs 17457 df-qtop 17462 df-imas 17463 df-xps 17465 df-mre 17539 df-mrc 17540 df-acs 17542 df-mgm 18573 df-sgrp 18652 df-mnd 18668 df-submnd 18714 df-mulg 18996 df-cntz 19233 df-cmn 19702 df-psmet 21232 df-xmet 21233 df-met 21234 df-bl 21235 df-mopn 21236 df-fbas 21237 df-fg 21238 df-cnfld 21241 df-top 22751 df-topon 22768 df-topsp 22790 df-bases 22804 df-cld 22878 df-ntr 22879 df-cls 22880 df-nei 22957 df-lp 22995 df-perf 22996 df-cn 23086 df-cnp 23087 df-haus 23174 df-tx 23421 df-hmeo 23614 df-fil 23705 df-fm 23797 df-flim 23798 df-flf 23799 df-xms 24181 df-ms 24182 df-tms 24183 df-cncf 24753 df-limc 25750 df-dv 25751 df-log 26445

This theorem is referenced by: ang180lem3 26698

W3C validator