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Theorem ang180lem1 25664

Description: Lemma for ang180 25669. Show that the "revolution number" 𝑁 is an integer, using efeq1 25389 to show that since the product of the three arguments 𝐴, 1 / (1 − 𝐴), (𝐴 − 1) / 𝐴 is -1, the sum of the logarithms must be an integer multiple of 2πi away from πi = log(-1). (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
ang180lem1	⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑁 ∈ ℤ ∧ (𝑇 / i) ∈ ℝ))

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

**Proof of Theorem ang180lem1**
Step	Hyp	Ref	Expression
1		picn 25321	. . . . . . 7 ⊢ π ∈ ℂ
2		2re 11887	. . . . . . . . . 10 ⊢ 2 ∈ ℝ
3		pire 25320	. . . . . . . . . 10 ⊢ π ∈ ℝ
4	2, 3	remulcli 10832	. . . . . . . . 9 ⊢ (2 · π) ∈ ℝ
5	4	recni 10830	. . . . . . . 8 ⊢ (2 · π) ∈ ℂ
6		2pos 11916	. . . . . . . . . 10 ⊢ 0 < 2
7		pipos 25322	. . . . . . . . . 10 ⊢ 0 < π
8	2, 3, 6, 7	mulgt0ii 10948	. . . . . . . . 9 ⊢ 0 < (2 · π)
9	4, 8	gt0ne0ii 11351	. . . . . . . 8 ⊢ (2 · π) ≠ 0
10	5, 9	pm3.2i 474	. . . . . . 7 ⊢ ((2 · π) ∈ ℂ ∧ (2 · π) ≠ 0)
11		ax-icn 10771	. . . . . . . 8 ⊢ i ∈ ℂ
12		ine0 11250	. . . . . . . 8 ⊢ i ≠ 0
13	11, 12	pm3.2i 474	. . . . . . 7 ⊢ (i ∈ ℂ ∧ i ≠ 0)
14		divcan5 11517	. . . . . . 7 ⊢ ((π ∈ ℂ ∧ ((2 · π) ∈ ℂ ∧ (2 · π) ≠ 0) ∧ (i ∈ ℂ ∧ i ≠ 0)) → ((i · π) / (i · (2 · π))) = (π / (2 · π)))
15	1, 10, 13, 14	mp3an 1463	. . . . . 6 ⊢ ((i · π) / (i · (2 · π))) = (π / (2 · π))
16	3, 7	gt0ne0ii 11351	. . . . . . 7 ⊢ π ≠ 0
17		recdiv 11521	. . . . . . 7 ⊢ ((((2 · π) ∈ ℂ ∧ (2 · π) ≠ 0) ∧ (π ∈ ℂ ∧ π ≠ 0)) → (1 / ((2 · π) / π)) = (π / (2 · π)))
18	5, 9, 1, 16, 17	mp4an 693	. . . . . 6 ⊢ (1 / ((2 · π) / π)) = (π / (2 · π))
19	2	recni 10830	. . . . . . . 8 ⊢ 2 ∈ ℂ
20	19, 1, 16	divcan4i 11562	. . . . . . 7 ⊢ ((2 · π) / π) = 2
21	20	oveq2i 7213	. . . . . 6 ⊢ (1 / ((2 · π) / π)) = (1 / 2)
22	15, 18, 21	3eqtr2i 2768	. . . . 5 ⊢ ((i · π) / (i · (2 · π))) = (1 / 2)
23	22	oveq2i 7213	. . . 4 ⊢ ((𝑇 / (i · (2 · π))) − ((i · π) / (i · (2 · π)))) = ((𝑇 / (i · (2 · π))) − (1 / 2))
24		ang180lem1.2	. . . . . 6 ⊢ 𝑇 = (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))
25		ax-1cn 10770	. . . . . . . . . . 11 ⊢ 1 ∈ ℂ
26		simp1 1138	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ∈ ℂ)
27		subcl 11060	. . . . . . . . . . 11 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 − 𝐴) ∈ ℂ)
28	25, 26, 27	sylancr 590	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 − 𝐴) ∈ ℂ)
29		simp3 1140	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ≠ 1)
30	29	necomd 2990	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 1 ≠ 𝐴)
31		subeq0 11087	. . . . . . . . . . . . 13 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴))
32	25, 26, 31	sylancr 590	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴))
33	32	necon3bid 2979	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 − 𝐴) ≠ 0 ↔ 1 ≠ 𝐴))
34	30, 33	mpbird 260	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 − 𝐴) ≠ 0)
35	28, 34	reccld 11584	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ∈ ℂ)
36	28, 34	recne0d 11585	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) ≠ 0)
37	35, 36	logcld 25431	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘(1 / (1 − 𝐴))) ∈ ℂ)
38		subcl 11060	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ)
39	26, 25, 38	sylancl 589	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝐴 − 1) ∈ ℂ)
40		simp2 1139	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝐴 ≠ 0)
41	39, 26, 40	divcld 11591	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ∈ ℂ)
42		subeq0 11087	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1))
43	26, 25, 42	sylancl 589	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1))
44	43	necon3bid 2979	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) ≠ 0 ↔ 𝐴 ≠ 1))
45	29, 44	mpbird 260	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝐴 − 1) ≠ 0)
46	39, 26, 45, 40	divne0d 11607	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝐴 − 1) / 𝐴) ≠ 0)
47	41, 46	logcld 25431	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘((𝐴 − 1) / 𝐴)) ∈ ℂ)
48	37, 47	addcld 10835	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℂ)
49	26, 40	logcld 25431	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (log‘𝐴) ∈ ℂ)
50	48, 49	addcld 10835	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)) ∈ ℂ)
51	24, 50	eqeltrid 2838	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑇 ∈ ℂ)
52	11, 1	mulcli 10823	. . . . . 6 ⊢ (i · π) ∈ ℂ
53	52	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (i · π) ∈ ℂ)
54	11, 5	mulcli 10823	. . . . . 6 ⊢ (i · (2 · π)) ∈ ℂ
55	54	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (i · (2 · π)) ∈ ℂ)
56	11, 5, 12, 9	mulne0i 11458	. . . . . 6 ⊢ (i · (2 · π)) ≠ 0
57	56	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (i · (2 · π)) ≠ 0)
58	51, 53, 55, 57	divsubdird 11630	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 − (i · π)) / (i · (2 · π))) = ((𝑇 / (i · (2 · π))) − ((i · π) / (i · (2 · π)))))
59		ang180lem1.3	. . . . 5 ⊢ 𝑁 = (((𝑇 / i) / (2 · π)) − (1 / 2))
60	13	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (i ∈ ℂ ∧ i ≠ 0))
61	10	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((2 · π) ∈ ℂ ∧ (2 · π) ≠ 0))
62		divdiv1 11526	. . . . . . 7 ⊢ ((𝑇 ∈ ℂ ∧ (i ∈ ℂ ∧ i ≠ 0) ∧ ((2 · π) ∈ ℂ ∧ (2 · π) ≠ 0)) → ((𝑇 / i) / (2 · π)) = (𝑇 / (i · (2 · π))))
63	51, 60, 61, 62	syl3anc 1373	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) = (𝑇 / (i · (2 · π))))
64	63	oveq1d 7217	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝑇 / i) / (2 · π)) − (1 / 2)) = ((𝑇 / (i · (2 · π))) − (1 / 2)))
65	59, 64	syl5eq 2786	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑁 = ((𝑇 / (i · (2 · π))) − (1 / 2)))
66	23, 58, 65	3eqtr4a 2800	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 − (i · π)) / (i · (2 · π))) = 𝑁)
67		efsub 15642	. . . . . 6 ⊢ ((𝑇 ∈ ℂ ∧ (i · π) ∈ ℂ) → (exp‘(𝑇 − (i · π))) = ((exp‘𝑇) / (exp‘(i · π))))
68	51, 52, 67	sylancl 589	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(𝑇 − (i · π))) = ((exp‘𝑇) / (exp‘(i · π))))
69		efipi 25335	. . . . . . 7 ⊢ (exp‘(i · π)) = -1
70	69	oveq2i 7213	. . . . . 6 ⊢ ((exp‘𝑇) / (exp‘(i · π))) = ((exp‘𝑇) / -1)
71	24	fveq2i 6709	. . . . . . . . 9 ⊢ (exp‘𝑇) = (exp‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴)))
72		efadd 15636	. . . . . . . . . . 11 ⊢ ((((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) ∈ ℂ ∧ (log‘𝐴) ∈ ℂ) → (exp‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))) = ((exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) · (exp‘(log‘𝐴))))
73	48, 49, 72	syl2anc 587	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))) = ((exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) · (exp‘(log‘𝐴))))
74		efadd 15636	. . . . . . . . . . . . 13 ⊢ (((log‘(1 / (1 − 𝐴))) ∈ ℂ ∧ (log‘((𝐴 − 1) / 𝐴)) ∈ ℂ) → (exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = ((exp‘(log‘(1 / (1 − 𝐴)))) · (exp‘(log‘((𝐴 − 1) / 𝐴)))))
75	37, 47, 74	syl2anc 587	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = ((exp‘(log‘(1 / (1 − 𝐴)))) · (exp‘(log‘((𝐴 − 1) / 𝐴)))))
76		eflog 25437	. . . . . . . . . . . . . 14 ⊢ (((1 / (1 − 𝐴)) ∈ ℂ ∧ (1 / (1 − 𝐴)) ≠ 0) → (exp‘(log‘(1 / (1 − 𝐴)))) = (1 / (1 − 𝐴)))
77	35, 36, 76	syl2anc 587	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(log‘(1 / (1 − 𝐴)))) = (1 / (1 − 𝐴)))
78		eflog 25437	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 − 1) / 𝐴) ∈ ℂ ∧ ((𝐴 − 1) / 𝐴) ≠ 0) → (exp‘(log‘((𝐴 − 1) / 𝐴))) = ((𝐴 − 1) / 𝐴))
79	41, 46, 78	syl2anc 587	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(log‘((𝐴 − 1) / 𝐴))) = ((𝐴 − 1) / 𝐴))
80	77, 79	oveq12d 7220	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘(log‘(1 / (1 − 𝐴)))) · (exp‘(log‘((𝐴 − 1) / 𝐴)))) = ((1 / (1 − 𝐴)) · ((𝐴 − 1) / 𝐴)))
81	35, 41	mulcomd 10837	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 / (1 − 𝐴)) · ((𝐴 − 1) / 𝐴)) = (((𝐴 − 1) / 𝐴) · (1 / (1 − 𝐴))))
82	25	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 1 ∈ ℂ)
83	82, 28, 34	div2negd 11606	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-1 / -(1 − 𝐴)) = (1 / (1 − 𝐴)))
84		negsubdi2 11120	. . . . . . . . . . . . . . . . 17 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → -(1 − 𝐴) = (𝐴 − 1))
85	25, 26, 84	sylancr 590	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -(1 − 𝐴) = (𝐴 − 1))
86	85	oveq2d 7218	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (-1 / -(1 − 𝐴)) = (-1 / (𝐴 − 1)))
87	83, 86	eqtr3d 2776	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (1 / (1 − 𝐴)) = (-1 / (𝐴 − 1)))
88	87	oveq2d 7218	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝐴 − 1) / 𝐴) · (1 / (1 − 𝐴))) = (((𝐴 − 1) / 𝐴) · (-1 / (𝐴 − 1))))
89		neg1cn 11927	. . . . . . . . . . . . . . 15 ⊢ -1 ∈ ℂ
90	89	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → -1 ∈ ℂ)
91	90, 39, 26, 45, 40	dmdcand 11620	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝐴 − 1) / 𝐴) · (-1 / (𝐴 − 1))) = (-1 / 𝐴))
92	81, 88, 91	3eqtrd 2778	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((1 / (1 − 𝐴)) · ((𝐴 − 1) / 𝐴)) = (-1 / 𝐴))
93	75, 80, 92	3eqtrd 2778	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) = (-1 / 𝐴))
94		eflog 25437	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (exp‘(log‘𝐴)) = 𝐴)
95	26, 40, 94	syl2anc 587	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(log‘𝐴)) = 𝐴)
96	93, 95	oveq12d 7220	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴)))) · (exp‘(log‘𝐴))) = ((-1 / 𝐴) · 𝐴))
97	90, 26, 40	divcan1d 11592	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((-1 / 𝐴) · 𝐴) = -1)
98	73, 96, 97	3eqtrd 2778	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(((log‘(1 / (1 − 𝐴))) + (log‘((𝐴 − 1) / 𝐴))) + (log‘𝐴))) = -1)
99	71, 98	syl5eq 2786	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘𝑇) = -1)
100	99	oveq1d 7217	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘𝑇) / -1) = (-1 / -1))
101		neg1ne0 11929	. . . . . . . 8 ⊢ -1 ≠ 0
102	89, 101	dividi 11548	. . . . . . 7 ⊢ (-1 / -1) = 1
103	100, 102	eqtrdi 2790	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘𝑇) / -1) = 1)
104	70, 103	syl5eq 2786	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘𝑇) / (exp‘(i · π))) = 1)
105	68, 104	eqtrd 2774	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (exp‘(𝑇 − (i · π))) = 1)
106		subcl 11060	. . . . . 6 ⊢ ((𝑇 ∈ ℂ ∧ (i · π) ∈ ℂ) → (𝑇 − (i · π)) ∈ ℂ)
107	51, 52, 106	sylancl 589	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 − (i · π)) ∈ ℂ)
108		efeq1 25389	. . . . 5 ⊢ ((𝑇 − (i · π)) ∈ ℂ → ((exp‘(𝑇 − (i · π))) = 1 ↔ ((𝑇 − (i · π)) / (i · (2 · π))) ∈ ℤ))
109	107, 108	syl 17	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((exp‘(𝑇 − (i · π))) = 1 ↔ ((𝑇 − (i · π)) / (i · (2 · π))) ∈ ℤ))
110	105, 109	mpbid 235	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 − (i · π)) / (i · (2 · π))) ∈ ℤ)
111	66, 110	eqeltrrd 2835	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑁 ∈ ℤ)
112	11	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ∈ ℂ)
113	12	a1i 11	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → i ≠ 0)
114	51, 112, 113	divcld 11591	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ∈ ℂ)
115	5	a1i 11	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ∈ ℂ)
116	9	a1i 11	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (2 · π) ≠ 0)
117	114, 115, 116	divcan1d 11592	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝑇 / i) / (2 · π)) · (2 · π)) = (𝑇 / i))
118	59	oveq1i 7212	. . . . . 6 ⊢ (𝑁 + (1 / 2)) = ((((𝑇 / i) / (2 · π)) − (1 / 2)) + (1 / 2))
119	114, 115, 116	divcld 11591	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) ∈ ℂ)
120		halfre 12027	. . . . . . . 8 ⊢ (1 / 2) ∈ ℝ
121	120	recni 10830	. . . . . . 7 ⊢ (1 / 2) ∈ ℂ
122		npcan 11070	. . . . . . 7 ⊢ ((((𝑇 / i) / (2 · π)) ∈ ℂ ∧ (1 / 2) ∈ ℂ) → ((((𝑇 / i) / (2 · π)) − (1 / 2)) + (1 / 2)) = ((𝑇 / i) / (2 · π)))
123	119, 121, 122	sylancl 589	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((((𝑇 / i) / (2 · π)) − (1 / 2)) + (1 / 2)) = ((𝑇 / i) / (2 · π)))
124	118, 123	syl5eq 2786	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑁 + (1 / 2)) = ((𝑇 / i) / (2 · π)))
125	111	zred 12265	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → 𝑁 ∈ ℝ)
126		readdcl 10795	. . . . . 6 ⊢ ((𝑁 ∈ ℝ ∧ (1 / 2) ∈ ℝ) → (𝑁 + (1 / 2)) ∈ ℝ)
127	125, 120, 126	sylancl 589	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑁 + (1 / 2)) ∈ ℝ)
128	124, 127	eqeltrrd 2835	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → ((𝑇 / i) / (2 · π)) ∈ ℝ)
129		remulcl 10797	. . . 4 ⊢ ((((𝑇 / i) / (2 · π)) ∈ ℝ ∧ (2 · π) ∈ ℝ) → (((𝑇 / i) / (2 · π)) · (2 · π)) ∈ ℝ)
130	128, 4, 129	sylancl 589	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (((𝑇 / i) / (2 · π)) · (2 · π)) ∈ ℝ)
131	117, 130	eqeltrrd 2835	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑇 / i) ∈ ℝ)
132	111, 131	jca 515	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐴 ≠ 1) → (𝑁 ∈ ℤ ∧ (𝑇 / i) ∈ ℝ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ≠ wne 2935 ∖ cdif 3854 {csn 4531 ‘cfv 6369 (class class class)co 7202 ∈ cmpo 7204 ℂcc 10710 ℝcr 10711 0cc0 10712 1c1 10713 ici 10714 + caddc 10715 · cmul 10717 − cmin 11045 -cneg 11046 / cdiv 11472 2c2 11868 ℤcz 12159 ℑcim 14644 expce 15604 πcpi 15609 logclog 25415

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2706 ax-rep 5168 ax-sep 5181 ax-nul 5188 ax-pow 5247 ax-pr 5311 ax-un 7512 ax-inf2 9245 ax-cnex 10768 ax-resscn 10769 ax-1cn 10770 ax-icn 10771 ax-addcl 10772 ax-addrcl 10773 ax-mulcl 10774 ax-mulrcl 10775 ax-mulcom 10776 ax-addass 10777 ax-mulass 10778 ax-distr 10779 ax-i2m1 10780 ax-1ne0 10781 ax-1rid 10782 ax-rnegex 10783 ax-rrecex 10784 ax-cnre 10785 ax-pre-lttri 10786 ax-pre-lttrn 10787 ax-pre-ltadd 10788 ax-pre-mulgt0 10789 ax-pre-sup 10790 ax-addf 10791 ax-mulf 10792

This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2537 df-eu 2566 df-clab 2713 df-cleq 2726 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3403 df-sbc 3688 df-csb 3803 df-dif 3860 df-un 3862 df-in 3864 df-ss 3874 df-pss 3876 df-nul 4228 df-if 4430 df-pw 4505 df-sn 4532 df-pr 4534 df-tp 4536 df-op 4538 df-uni 4810 df-int 4850 df-iun 4896 df-iin 4897 df-br 5044 df-opab 5106 df-mpt 5125 df-tr 5151 df-id 5444 df-eprel 5449 df-po 5457 df-so 5458 df-fr 5498 df-se 5499 df-we 5500 df-xp 5546 df-rel 5547 df-cnv 5548 df-co 5549 df-dm 5550 df-rn 5551 df-res 5552 df-ima 5553 df-pred 6149 df-ord 6205 df-on 6206 df-lim 6207 df-suc 6208 df-iota 6327 df-fun 6371 df-fn 6372 df-f 6373 df-f1 6374 df-fo 6375 df-f1o 6376 df-fv 6377 df-isom 6378 df-riota 7159 df-ov 7205 df-oprab 7206 df-mpo 7207 df-of 7458 df-om 7634 df-1st 7750 df-2nd 7751 df-supp 7893 df-wrecs 8036 df-recs 8097 df-rdg 8135 df-1o 8191 df-2o 8192 df-er 8380 df-map 8499 df-pm 8500 df-ixp 8568 df-en 8616 df-dom 8617 df-sdom 8618 df-fin 8619 df-fsupp 8975 df-fi 9016 df-sup 9047 df-inf 9048 df-oi 9115 df-card 9538 df-pnf 10852 df-mnf 10853 df-xr 10854 df-ltxr 10855 df-le 10856 df-sub 11047 df-neg 11048 df-div 11473 df-nn 11814 df-2 11876 df-3 11877 df-4 11878 df-5 11879 df-6 11880 df-7 11881 df-8 11882 df-9 11883 df-n0 12074 df-z 12160 df-dec 12277 df-uz 12422 df-q 12528 df-rp 12570 df-xneg 12687 df-xadd 12688 df-xmul 12689 df-ioo 12922 df-ioc 12923 df-ico 12924 df-icc 12925 df-fz 13079 df-fzo 13222 df-fl 13350 df-mod 13426 df-seq 13558 df-exp 13619 df-fac 13823 df-bc 13852 df-hash 13880 df-shft 14613 df-cj 14645 df-re 14646 df-im 14647 df-sqrt 14781 df-abs 14782 df-limsup 15015 df-clim 15032 df-rlim 15033 df-sum 15233 df-ef 15610 df-sin 15612 df-cos 15613 df-pi 15615 df-struct 16686 df-ndx 16687 df-slot 16688 df-base 16690 df-sets 16691 df-ress 16692 df-plusg 16780 df-mulr 16781 df-starv 16782 df-sca 16783 df-vsca 16784 df-ip 16785 df-tset 16786 df-ple 16787 df-ds 16789 df-unif 16790 df-hom 16791 df-cco 16792 df-rest 16899 df-topn 16900 df-0g 16918 df-gsum 16919 df-topgen 16920 df-pt 16921 df-prds 16924 df-xrs 16979 df-qtop 16984 df-imas 16985 df-xps 16987 df-mre 17061 df-mrc 17062 df-acs 17064 df-mgm 18086 df-sgrp 18135 df-mnd 18146 df-submnd 18191 df-mulg 18461 df-cntz 18683 df-cmn 19144 df-psmet 20327 df-xmet 20328 df-met 20329 df-bl 20330 df-mopn 20331 df-fbas 20332 df-fg 20333 df-cnfld 20336 df-top 21763 df-topon 21780 df-topsp 21802 df-bases 21815 df-cld 21888 df-ntr 21889 df-cls 21890 df-nei 21967 df-lp 22005 df-perf 22006 df-cn 22096 df-cnp 22097 df-haus 22184 df-tx 22431 df-hmeo 22624 df-fil 22715 df-fm 22807 df-flim 22808 df-flf 22809 df-xms 23190 df-ms 23191 df-tms 23192 df-cncf 23747 df-limc 24735 df-dv 24736 df-log 25417

This theorem is referenced by: ang180lem2 25665 ang180lem3 25666

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