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Theorem dchrinv 26764

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 2733	. . . . . . . 8 ⊢ (ℤ/nℤ‘𝑁) = (ℤ/nℤ‘𝑁)
3		dchrabs.d	. . . . . . . 8 ⊢ 𝐷 = (Base‘𝐺)
4		eqid 2733	. . . . . . . 8 ⊢ (+_g‘𝐺) = (+_g‘𝐺)
5		dchrabs.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐷)
6		cjf 15051	. . . . . . . . . 10 ⊢ ∗:ℂ⟶ℂ
7		eqid 2733	. . . . . . . . . . 11 ⊢ (Base‘(ℤ/nℤ‘𝑁)) = (Base‘(ℤ/nℤ‘𝑁))
8	1, 2, 3, 7, 5	dchrf 26745	. . . . . . . . . 10 ⊢ (𝜑 → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
9		fco 6742	. . . . . . . . . 10 ⊢ ((∗:ℂ⟶ℂ ∧ 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ) → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
10	6, 8, 9	sylancr 588	. . . . . . . . 9 ⊢ (𝜑 → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
11		eqid 2733	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) = (Unit‘(ℤ/nℤ‘𝑁))
12	1, 3	dchrrcl 26743	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 ∈ 𝐷 → 𝑁 ∈ ℕ)
13	5, 12	syl 17	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝑁 ∈ ℕ)
14	1, 2, 7, 11, 13, 3	dchrelbas3 26741	. . . . . . . . . . . . . . . . . . . 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 497	. . . . . . . . . . . . . . . . . 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 1143	. . . . . . . . . . . . . . . . 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 3249	. . . . . . . . . . . . . . . 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 3249	. . . . . . . . . . . . . . 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 468	. . . . . . . . . . . . . 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 6896	. . . . . . . . . . . . 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 482	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
23	7, 11	unitss 20190	. . . . . . . . . . . . . . . 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 3981	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
26	22, 25	ffvelcdmd 7088	. . . . . . . . . . . . . 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 3981	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁)))
29	22, 28	ffvelcdmd 7088	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑦) ∈ ℂ)
30	26, 29	cjmuld 15168	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘((𝑋‘𝑥) · (𝑋‘𝑦))) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
31	21, 30	eqtrd 2773	. . . . . . . . . . . 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 12532	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
33	2	zncrng 21100	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ → (ℤ/nℤ‘𝑁) ∈ CRing)
34		crngring 20068	. . . . . . . . . . . . . . . 16 ⊢ ((ℤ/nℤ‘𝑁) ∈ CRing → (ℤ/nℤ‘𝑁) ∈ Ring)
35	32, 33, 34	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℤ/nℤ‘𝑁) ∈ Ring)
36	35	adantr 482	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (ℤ/nℤ‘𝑁) ∈ Ring)
37		eqid 2733	. . . . . . . . . . . . . . 15 ⊢ (._r‘(ℤ/nℤ‘𝑁)) = (._r‘(ℤ/nℤ‘𝑁))
38	7, 37	ringcl 20073	. . . . . . . . . . . . . 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 1372	. . . . . . . . . . . . 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 585	. . . . . . . . . . . 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 585	. . . . . . . . . . . . 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 585	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
46	43, 45	oveq12d 7427	. . . . . . . . . . . 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 2783	. . . . . . . . . . 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 3201	. . . . . . . . . 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 2733	. . . . . . . . . . . . . 14 ⊢ (1_r‘(ℤ/nℤ‘𝑁)) = (1_r‘(ℤ/nℤ‘𝑁))
50	7, 49	ringidcl 20083	. . . . . . . . . . . . 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 585	. . . . . . . . . . 11 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))))
54	16	simp2d 1144	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
55	54	fveq2d 6896	. . . . . . . . . . . 12 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = (∗‘1))
56		1re 11214	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ
57		cjre 15086	. . . . . . . . . . . . 13 ⊢ (1 ∈ ℝ → (∗‘1) = 1)
58	56, 57	ax-mp 5	. . . . . . . . . . . 12 ⊢ (∗‘1) = 1
59	55, 58	eqtrdi 2789	. . . . . . . . . . 11 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = 1)
60	53, 59	eqtrd 2773	. . . . . . . . . 10 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
61	16	simp3d 1145	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
62	8, 42	sylan 581	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
63		cj0 15105	. . . . . . . . . . . . . . . . . 18 ⊢ (∗‘0) = 0
64	63	eqcomi 2742	. . . . . . . . . . . . . . . . 17 ⊢ 0 = (∗‘0)
65	64	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → 0 = (∗‘0))
66	62, 65	eqeq12d 2749	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (∗‘(𝑋‘𝑥)) = (∗‘0)))
67	8	ffvelcdmda 7087	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
68		0cn 11206	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℂ
69		cj11 15109	. . . . . . . . . . . . . . . 16 ⊢ (((𝑋‘𝑥) ∈ ℂ ∧ 0 ∈ ℂ) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
70	67, 68, 69	sylancl 587	. . . . . . . . . . . . . . 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 2986	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) ≠ 0 ↔ (𝑋‘𝑥) ≠ 0))
73	72	imbi1d 342	. . . . . . . . . . . 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 3176	. . . . . . . . . . 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 1129	. . . . . . . . 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 26741	. . . . . . . . 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 26751	. . . . . . 7 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
80	79	adantr 482	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
81	80	fveq1d 6894	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥))
82	23	sseli 3979	. . . . . . . . 9 ⊢ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
83	82, 62	sylan2 594	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
84	83	oveq2d 7425	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
85	82, 67	sylan2 594	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
86	85	absvalsqd 15389	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
87	5	adantr 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 ∈ 𝐷)
88		simpr 486	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
89	1, 3, 87, 2, 11, 88	dchrabs 26763	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (abs‘(𝑋‘𝑥)) = 1)
90	89	oveq1d 7424	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = (1↑2))
91		sq1 14159	. . . . . . . 8 ⊢ (1↑2) = 1
92	90, 91	eqtrdi 2789	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = 1)
93	84, 86, 92	3eqtr2d 2779	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = 1)
94	8	adantr 482	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
95	94	ffnd 6719	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)))
96	10	ffnd 6719	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
97	96	adantr 482	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
98		fvexd 6907	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (Base‘(ℤ/nℤ‘𝑁)) ∈ V)
99	82	adantl 483	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
100		fnfvof 7687	. . . . . . 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 2733	. . . . . . 7 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
103	13	adantr 482	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑁 ∈ ℕ)
104	1, 2, 102, 11, 103, 88	dchr1 26760	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((0_g‘𝐺)‘𝑥) = 1)
105	93, 101, 104	3eqtr4d 2783	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
106	81, 105	eqtrd 2773	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
107	106	ralrimiva 3147	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
108	1, 2, 3, 4, 5, 78	dchrmulcl 26752	. . . 4 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) ∈ 𝐷)
109	1	dchrabl 26757	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝐺 ∈ Abel)
110		ablgrp 19653	. . . . . 6 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
111	13, 109, 110	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp)
112	3, 102	grpidcl 18850	. . . . 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 26761	. . 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 18876	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐷 ∧ (∗ ∘ 𝑋) ∈ 𝐷) → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
118	111, 5, 78, 117	syl3anc 1372	. 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 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 Vcvv 3475 ∘ ccom 5681 Fn wfn 6539 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ∘_f cof 7668 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 · cmul 11115 ℕcn 12212 2c2 12267 ℕ₀cn0 12472 ↑cexp 14027 ∗ccj 15043 abscabs 15181 Basecbs 17144 +_gcplusg 17197 ._rcmulr 17198 0_gc0g 17385 Grpcgrp 18819 inv_gcminusg 18820 Abelcabl 19649 1_rcur 20004 Ringcrg 20056 CRingccrg 20057 Unitcui 20169 ℤ/nℤczn 21052 DChrcdchr 26735

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188 ax-addf 11189 ax-mulf 11190

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-iin 5001 df-disj 5115 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-of 7670 df-om 7856 df-1st 7975 df-2nd 7976 df-supp 8147 df-tpos 8211 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-2o 8467 df-oadd 8470 df-omul 8471 df-er 8703 df-ec 8705 df-qs 8709 df-map 8822 df-pm 8823 df-ixp 8892 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fsupp 9362 df-fi 9406 df-sup 9437 df-inf 9438 df-oi 9505 df-card 9934 df-acn 9937 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-5 12278 df-6 12279 df-7 12280 df-8 12281 df-9 12282 df-n0 12473 df-z 12559 df-dec 12678 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ioc 13329 df-ico 13330 df-icc 13331 df-fz 13485 df-fzo 13628 df-fl 13757 df-mod 13835 df-seq 13967 df-exp 14028 df-fac 14234 df-bc 14263 df-hash 14291 df-shft 15014 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-limsup 15415 df-clim 15432 df-rlim 15433 df-sum 15633 df-ef 16011 df-sin 16013 df-cos 16014 df-pi 16016 df-dvds 16198 df-struct 17080 df-sets 17097 df-slot 17115 df-ndx 17127 df-base 17145 df-ress 17174 df-plusg 17210 df-mulr 17211 df-starv 17212 df-sca 17213 df-vsca 17214 df-ip 17215 df-tset 17216 df-ple 17217 df-ds 17219 df-unif 17220 df-hom 17221 df-cco 17222 df-rest 17368 df-topn 17369 df-0g 17387 df-gsum 17388 df-topgen 17389 df-pt 17390 df-prds 17393 df-xrs 17448 df-qtop 17453 df-imas 17454 df-qus 17455 df-xps 17456 df-mre 17530 df-mrc 17531 df-acs 17533 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-mhm 18671 df-submnd 18672 df-grp 18822 df-minusg 18823 df-sbg 18824 df-mulg 18951 df-subg 19003 df-nsg 19004 df-eqg 19005 df-ghm 19090 df-cntz 19181 df-od 19396 df-cmn 19650 df-abl 19651 df-mgp 19988 df-ur 20005 df-ring 20058 df-cring 20059 df-oppr 20150 df-dvdsr 20171 df-unit 20172 df-invr 20202 df-dvr 20215 df-rnghom 20251 df-subrg 20317 df-drng 20359 df-lmod 20473 df-lss 20543 df-lsp 20583 df-sra 20785 df-rgmod 20786 df-lidl 20787 df-rsp 20788 df-2idl 20857 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-fbas 20941 df-fg 20942 df-cnfld 20945 df-zring 21018 df-zrh 21053 df-zn 21056 df-top 22396 df-topon 22413 df-topsp 22435 df-bases 22449 df-cld 22523 df-ntr 22524 df-cls 22525 df-nei 22602 df-lp 22640 df-perf 22641 df-cn 22731 df-cnp 22732 df-haus 22819 df-tx 23066 df-hmeo 23259 df-fil 23350 df-fm 23442 df-flim 23443 df-flf 23444 df-xms 23826 df-ms 23827 df-tms 23828 df-cncf 24394 df-limc 25383 df-dv 25384 df-log 26065 df-cxp 26066 df-dchr 26736

This theorem is referenced by: dchr2sum 26776 dchrisum0re 27016

W3C validator