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Theorem dchrinv 27181

Description: The inverse of a Dirichlet character is the conjugate (which is also the multiplicative inverse, because the values of 𝑋 are unimodular). (Contributed by Mario Carneiro, 28-Apr-2016.)

**Hypotheses**
Ref	Expression
dchrabs.g	⊢ 𝐺 = (DChr‘𝑁)
dchrabs.d	⊢ 𝐷 = (Base‘𝐺)
dchrabs.x	⊢ (𝜑 → 𝑋 ∈ 𝐷)
dchrinv.i	⊢ 𝐼 = (inv_g‘𝐺)

**Assertion**
Ref	Expression
dchrinv	⊢ (𝜑 → (𝐼‘𝑋) = (∗ ∘ 𝑋))

Proof of Theorem dchrinv Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		dchrabs.g	. . . . . . . 8 ⊢ 𝐺 = (DChr‘𝑁)
2		eqid 2727	. . . . . . . 8 ⊢ (ℤ/nℤ‘𝑁) = (ℤ/nℤ‘𝑁)
3		dchrabs.d	. . . . . . . 8 ⊢ 𝐷 = (Base‘𝐺)
4		eqid 2727	. . . . . . . 8 ⊢ (+_g‘𝐺) = (+_g‘𝐺)
5		dchrabs.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐷)
6		cjf 15075	. . . . . . . . . 10 ⊢ ∗:ℂ⟶ℂ
7		eqid 2727	. . . . . . . . . . 11 ⊢ (Base‘(ℤ/nℤ‘𝑁)) = (Base‘(ℤ/nℤ‘𝑁))
8	1, 2, 3, 7, 5	dchrf 27162	. . . . . . . . . 10 ⊢ (𝜑 → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
9		fco 6741	. . . . . . . . . 10 ⊢ ((∗:ℂ⟶ℂ ∧ 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ) → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
10	6, 8, 9	sylancr 586	. . . . . . . . 9 ⊢ (𝜑 → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
11		eqid 2727	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) = (Unit‘(ℤ/nℤ‘𝑁))
12	1, 3	dchrrcl 27160	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 ∈ 𝐷 → 𝑁 ∈ ℕ)
13	5, 12	syl 17	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝑁 ∈ ℕ)
14	1, 2, 7, 11, 13, 3	dchrelbas3 27158	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (𝑋 ∈ 𝐷 ↔ (𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ (∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)) ∧ (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1 ∧ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))))
15	5, 14	mpbid 231	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → (𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ (∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)) ∧ (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1 ∧ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))))
16	15	simprd 495	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)) ∧ (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1 ∧ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))
17	16	simp1d 1140	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)))
18	17	r19.21bi 3243	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)))
19	18	r19.21bi 3243	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)))
20	19	anasss 466	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = ((𝑋‘𝑥) · (𝑋‘𝑦)))
21	20	fveq2d 6895	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦))) = (∗‘((𝑋‘𝑥) · (𝑋‘𝑦))))
22	8	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
23	7, 11	unitss 20304	. . . . . . . . . . . . . . . 16 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) ⊆ (Base‘(ℤ/nℤ‘𝑁))
24		simprl 770	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
25	23, 24	sselid 3976	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
26	22, 25	ffvelcdmd 7089	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑥) ∈ ℂ)
27		simprr 772	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
28	23, 27	sselid 3976	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁)))
29	22, 28	ffvelcdmd 7089	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑦) ∈ ℂ)
30	26, 29	cjmuld 15192	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘((𝑋‘𝑥) · (𝑋‘𝑦))) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
31	21, 30	eqtrd 2767	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦))) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
32	13	nnnn0d 12554	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
33	2	zncrng 21465	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ → (ℤ/nℤ‘𝑁) ∈ CRing)
34		crngring 20176	. . . . . . . . . . . . . . . 16 ⊢ ((ℤ/nℤ‘𝑁) ∈ CRing → (ℤ/nℤ‘𝑁) ∈ Ring)
35	32, 33, 34	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℤ/nℤ‘𝑁) ∈ Ring)
36	35	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (ℤ/nℤ‘𝑁) ∈ Ring)
37		eqid 2727	. . . . . . . . . . . . . . 15 ⊢ (._r‘(ℤ/nℤ‘𝑁)) = (._r‘(ℤ/nℤ‘𝑁))
38	7, 37	ringcl 20181	. . . . . . . . . . . . . 14 ⊢ (((ℤ/nℤ‘𝑁) ∈ Ring ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦) ∈ (Base‘(ℤ/nℤ‘𝑁)))
39	36, 25, 28, 38	syl3anc 1369	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦) ∈ (Base‘(ℤ/nℤ‘𝑁)))
40		fvco3 6991	. . . . . . . . . . . . 13 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ (𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦) ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (∗‘(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦))))
41	22, 39, 40	syl2anc 583	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (∗‘(𝑋‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦))))
42		fvco3 6991	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
43	22, 25, 42	syl2anc 583	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
44		fvco3 6991	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
45	22, 28, 44	syl2anc 583	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
46	43, 45	oveq12d 7432	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (((∗ ∘ 𝑋)‘𝑥) · ((∗ ∘ 𝑋)‘𝑦)) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
47	31, 41, 46	3eqtr4d 2777	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (((∗ ∘ 𝑋)‘𝑥) · ((∗ ∘ 𝑋)‘𝑦)))
48	47	ralrimivva 3195	. . . . . . . . . 10 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (((∗ ∘ 𝑋)‘𝑥) · ((∗ ∘ 𝑋)‘𝑦)))
49		eqid 2727	. . . . . . . . . . . . . 14 ⊢ (1_r‘(ℤ/nℤ‘𝑁)) = (1_r‘(ℤ/nℤ‘𝑁))
50	7, 49	ringidcl 20191	. . . . . . . . . . . . 13 ⊢ ((ℤ/nℤ‘𝑁) ∈ Ring → (1_r‘(ℤ/nℤ‘𝑁)) ∈ (Base‘(ℤ/nℤ‘𝑁)))
51	35, 50	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → (1_r‘(ℤ/nℤ‘𝑁)) ∈ (Base‘(ℤ/nℤ‘𝑁)))
52		fvco3 6991	. . . . . . . . . . . 12 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ (1_r‘(ℤ/nℤ‘𝑁)) ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))))
53	8, 51, 52	syl2anc 583	. . . . . . . . . . 11 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))))
54	16	simp2d 1141	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
55	54	fveq2d 6895	. . . . . . . . . . . 12 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = (∗‘1))
56		1re 11236	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ
57		cjre 15110	. . . . . . . . . . . . 13 ⊢ (1 ∈ ℝ → (∗‘1) = 1)
58	56, 57	ax-mp 5	. . . . . . . . . . . 12 ⊢ (∗‘1) = 1
59	55, 58	eqtrdi 2783	. . . . . . . . . . 11 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = 1)
60	53, 59	eqtrd 2767	. . . . . . . . . 10 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
61	16	simp3d 1142	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
62	8, 42	sylan 579	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
63		cj0 15129	. . . . . . . . . . . . . . . . . 18 ⊢ (∗‘0) = 0
64	63	eqcomi 2736	. . . . . . . . . . . . . . . . 17 ⊢ 0 = (∗‘0)
65	64	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → 0 = (∗‘0))
66	62, 65	eqeq12d 2743	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (∗‘(𝑋‘𝑥)) = (∗‘0)))
67	8	ffvelcdmda 7088	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
68		0cn 11228	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℂ
69		cj11 15133	. . . . . . . . . . . . . . . 16 ⊢ (((𝑋‘𝑥) ∈ ℂ ∧ 0 ∈ ℂ) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
70	67, 68, 69	sylancl 585	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
71	66, 70	bitrd 279	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (𝑋‘𝑥) = 0))
72	71	necon3bid 2980	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) ≠ 0 ↔ (𝑋‘𝑥) ≠ 0))
73	72	imbi1d 341	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) ↔ ((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))
74	73	ralbidva 3170	. . . . . . . . . . 11 ⊢ (𝜑 → (∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))(((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) ↔ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))
75	61, 74	mpbird 257	. . . . . . . . . 10 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))(((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
76	48, 60, 75	3jca 1126	. . . . . . . . 9 ⊢ (𝜑 → (∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (((∗ ∘ 𝑋)‘𝑥) · ((∗ ∘ 𝑋)‘𝑦)) ∧ ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1 ∧ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))(((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))
77	1, 2, 7, 11, 13, 3	dchrelbas3 27158	. . . . . . . . 9 ⊢ (𝜑 → ((∗ ∘ 𝑋) ∈ 𝐷 ↔ ((∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ (∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))∀𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁))((∗ ∘ 𝑋)‘(𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦)) = (((∗ ∘ 𝑋)‘𝑥) · ((∗ ∘ 𝑋)‘𝑦)) ∧ ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1 ∧ ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))(((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))))))
78	10, 76, 77	mpbir2and 712	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) ∈ 𝐷)
79	1, 2, 3, 4, 5, 78	dchrmul 27168	. . . . . . 7 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
80	79	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
81	80	fveq1d 6893	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥))
82	23	sseli 3974	. . . . . . . . 9 ⊢ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
83	82, 62	sylan2 592	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
84	83	oveq2d 7430	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
85	82, 67	sylan2 592	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
86	85	absvalsqd 15413	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
87	5	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 ∈ 𝐷)
88		simpr 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
89	1, 3, 87, 2, 11, 88	dchrabs 27180	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (abs‘(𝑋‘𝑥)) = 1)
90	89	oveq1d 7429	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = (1↑2))
91		sq1 14182	. . . . . . . 8 ⊢ (1↑2) = 1
92	90, 91	eqtrdi 2783	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = 1)
93	84, 86, 92	3eqtr2d 2773	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = 1)
94	8	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
95	94	ffnd 6717	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)))
96	10	ffnd 6717	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
97	96	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
98		fvexd 6906	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (Base‘(ℤ/nℤ‘𝑁)) ∈ V)
99	82	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
100		fnfvof 7696	. . . . . . 7 ⊢ (((𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)) ∧ (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁))) ∧ ((Base‘(ℤ/nℤ‘𝑁)) ∈ V ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)))
101	95, 97, 98, 99, 100	syl22anc 838	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)))
102		eqid 2727	. . . . . . 7 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
103	13	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑁 ∈ ℕ)
104	1, 2, 102, 11, 103, 88	dchr1 27177	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((0_g‘𝐺)‘𝑥) = 1)
105	93, 101, 104	3eqtr4d 2777	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
106	81, 105	eqtrd 2767	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
107	106	ralrimiva 3141	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
108	1, 2, 3, 4, 5, 78	dchrmulcl 27169	. . . 4 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) ∈ 𝐷)
109	1	dchrabl 27174	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝐺 ∈ Abel)
110		ablgrp 19731	. . . . . 6 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
111	13, 109, 110	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp)
112	3, 102	grpidcl 18913	. . . . 5 ⊢ (𝐺 ∈ Grp → (0_g‘𝐺) ∈ 𝐷)
113	111, 112	syl 17	. . . 4 ⊢ (𝜑 → (0_g‘𝐺) ∈ 𝐷)
114	1, 2, 3, 11, 108, 113	dchreq 27178	. . 3 ⊢ (𝜑 → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺) ↔ ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥)))
115	107, 114	mpbird 257	. 2 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺))
116		dchrinv.i	. . . 4 ⊢ 𝐼 = (inv_g‘𝐺)
117	3, 4, 102, 116	grpinvid1 18939	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐷 ∧ (∗ ∘ 𝑋) ∈ 𝐷) → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
118	111, 5, 78, 117	syl3anc 1369	. 2 ⊢ (𝜑 → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
119	115, 118	mpbird 257	1 ⊢ (𝜑 → (𝐼‘𝑋) = (∗ ∘ 𝑋))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ≠ wne 2935 ∀wral 3056 Vcvv 3469 ∘ ccom 5676 Fn wfn 6537 ⟶wf 6538 ‘cfv 6542 (class class class)co 7414 ∘_f cof 7677 ℂcc 11128 ℝcr 11129 0cc0 11130 1c1 11131 · cmul 11135 ℕcn 12234 2c2 12289 ℕ₀cn0 12494 ↑cexp 14050 ∗ccj 15067 abscabs 15205 Basecbs 17171 +_gcplusg 17224 ._rcmulr 17225 0_gc0g 17412 Grpcgrp 18881 inv_gcminusg 18882 Abelcabl 19727 1_rcur 20112 Ringcrg 20164 CRingccrg 20165 Unitcui 20283 ℤ/nℤczn 21415 DChrcdchr 27152

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-inf2 9656 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207 ax-pre-sup 11208 ax-addf 11209 ax-mulf 11210

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-tp 4629 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-iin 4994 df-disj 5108 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-se 5628 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-of 7679 df-om 7865 df-1st 7987 df-2nd 7988 df-supp 8160 df-tpos 8225 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-2o 8481 df-oadd 8484 df-omul 8485 df-er 8718 df-ec 8720 df-qs 8724 df-map 8838 df-pm 8839 df-ixp 8908 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-fsupp 9378 df-fi 9426 df-sup 9457 df-inf 9458 df-oi 9525 df-card 9954 df-acn 9957 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-div 11894 df-nn 12235 df-2 12297 df-3 12298 df-4 12299 df-5 12300 df-6 12301 df-7 12302 df-8 12303 df-9 12304 df-n0 12495 df-z 12581 df-dec 12700 df-uz 12845 df-q 12955 df-rp 12999 df-xneg 13116 df-xadd 13117 df-xmul 13118 df-ioo 13352 df-ioc 13353 df-ico 13354 df-icc 13355 df-fz 13509 df-fzo 13652 df-fl 13781 df-mod 13859 df-seq 13991 df-exp 14051 df-fac 14257 df-bc 14286 df-hash 14314 df-shft 15038 df-cj 15070 df-re 15071 df-im 15072 df-sqrt 15206 df-abs 15207 df-limsup 15439 df-clim 15456 df-rlim 15457 df-sum 15657 df-ef 16035 df-sin 16037 df-cos 16038 df-pi 16040 df-dvds 16223 df-struct 17107 df-sets 17124 df-slot 17142 df-ndx 17154 df-base 17172 df-ress 17201 df-plusg 17237 df-mulr 17238 df-starv 17239 df-sca 17240 df-vsca 17241 df-ip 17242 df-tset 17243 df-ple 17244 df-ds 17246 df-unif 17247 df-hom 17248 df-cco 17249 df-rest 17395 df-topn 17396 df-0g 17414 df-gsum 17415 df-topgen 17416 df-pt 17417 df-prds 17420 df-xrs 17475 df-qtop 17480 df-imas 17481 df-qus 17482 df-xps 17483 df-mre 17557 df-mrc 17558 df-acs 17560 df-mgm 18591 df-sgrp 18670 df-mnd 18686 df-mhm 18731 df-submnd 18732 df-grp 18884 df-minusg 18885 df-sbg 18886 df-mulg 19015 df-subg 19069 df-nsg 19070 df-eqg 19071 df-ghm 19159 df-cntz 19259 df-od 19474 df-cmn 19728 df-abl 19729 df-mgp 20066 df-rng 20084 df-ur 20113 df-ring 20166 df-cring 20167 df-oppr 20262 df-dvdsr 20285 df-unit 20286 df-invr 20316 df-dvr 20329 df-rhm 20400 df-subrng 20472 df-subrg 20497 df-drng 20615 df-lmod 20734 df-lss 20805 df-lsp 20845 df-sra 21047 df-rgmod 21048 df-lidl 21093 df-rsp 21094 df-2idl 21133 df-psmet 21258 df-xmet 21259 df-met 21260 df-bl 21261 df-mopn 21262 df-fbas 21263 df-fg 21264 df-cnfld 21267 df-zring 21360 df-zrh 21416 df-zn 21419 df-top 22783 df-topon 22800 df-topsp 22822 df-bases 22836 df-cld 22910 df-ntr 22911 df-cls 22912 df-nei 22989 df-lp 23027 df-perf 23028 df-cn 23118 df-cnp 23119 df-haus 23206 df-tx 23453 df-hmeo 23646 df-fil 23737 df-fm 23829 df-flim 23830 df-flf 23831 df-xms 24213 df-ms 24214 df-tms 24215 df-cncf 24785 df-limc 25782 df-dv 25783 df-log 26477 df-cxp 26478 df-dchr 27153

This theorem is referenced by: dchr2sum 27193 dchrisum0re 27433

W3C validator