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Theorem dchrinv 27225

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 2725	. . . . . . . 8 ⊢ (ℤ/nℤ‘𝑁) = (ℤ/nℤ‘𝑁)
3		dchrabs.d	. . . . . . . 8 ⊢ 𝐷 = (Base‘𝐺)
4		eqid 2725	. . . . . . . 8 ⊢ (+_g‘𝐺) = (+_g‘𝐺)
5		dchrabs.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐷)
6		cjf 15084	. . . . . . . . . 10 ⊢ ∗:ℂ⟶ℂ
7		eqid 2725	. . . . . . . . . . 11 ⊢ (Base‘(ℤ/nℤ‘𝑁)) = (Base‘(ℤ/nℤ‘𝑁))
8	1, 2, 3, 7, 5	dchrf 27206	. . . . . . . . . 10 ⊢ (𝜑 → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
9		fco 6745	. . . . . . . . . 10 ⊢ ((∗:ℂ⟶ℂ ∧ 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ) → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
10	6, 8, 9	sylancr 585	. . . . . . . . 9 ⊢ (𝜑 → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
11		eqid 2725	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) = (Unit‘(ℤ/nℤ‘𝑁))
12	1, 3	dchrrcl 27204	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 ∈ 𝐷 → 𝑁 ∈ ℕ)
13	5, 12	syl 17	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝑁 ∈ ℕ)
14	1, 2, 7, 11, 13, 3	dchrelbas3 27202	. . . . . . . . . . . . . . . . . . . 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 494	. . . . . . . . . . . . . . . . . 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 1139	. . . . . . . . . . . . . . . . 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 3239	. . . . . . . . . . . . . . . 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 3239	. . . . . . . . . . . . . . 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 465	. . . . . . . . . . . . . 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 6898	. . . . . . . . . . . . 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 479	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
23	7, 11	unitss 20320	. . . . . . . . . . . . . . . 16 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) ⊆ (Base‘(ℤ/nℤ‘𝑁))
24		simprl 769	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
25	23, 24	sselid 3975	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
26	22, 25	ffvelcdmd 7092	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑥) ∈ ℂ)
27		simprr 771	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
28	23, 27	sselid 3975	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁)))
29	22, 28	ffvelcdmd 7092	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑦) ∈ ℂ)
30	26, 29	cjmuld 15201	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘((𝑋‘𝑥) · (𝑋‘𝑦))) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
31	21, 30	eqtrd 2765	. . . . . . . . . . . 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 12562	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
33	2	zncrng 21483	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ → (ℤ/nℤ‘𝑁) ∈ CRing)
34		crngring 20190	. . . . . . . . . . . . . . . 16 ⊢ ((ℤ/nℤ‘𝑁) ∈ CRing → (ℤ/nℤ‘𝑁) ∈ Ring)
35	32, 33, 34	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℤ/nℤ‘𝑁) ∈ Ring)
36	35	adantr 479	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (ℤ/nℤ‘𝑁) ∈ Ring)
37		eqid 2725	. . . . . . . . . . . . . . 15 ⊢ (._r‘(ℤ/nℤ‘𝑁)) = (._r‘(ℤ/nℤ‘𝑁))
38	7, 37	ringcl 20195	. . . . . . . . . . . . . 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 1368	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦) ∈ (Base‘(ℤ/nℤ‘𝑁)))
40		fvco3 6994	. . . . . . . . . . . . 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 582	. . . . . . . . . . . 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 6994	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
43	22, 25, 42	syl2anc 582	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
44		fvco3 6994	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
45	22, 28, 44	syl2anc 582	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
46	43, 45	oveq12d 7435	. . . . . . . . . . . 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 2775	. . . . . . . . . . 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 3191	. . . . . . . . . 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 2725	. . . . . . . . . . . . . 14 ⊢ (1_r‘(ℤ/nℤ‘𝑁)) = (1_r‘(ℤ/nℤ‘𝑁))
50	7, 49	ringidcl 20207	. . . . . . . . . . . . 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 6994	. . . . . . . . . . . 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 582	. . . . . . . . . . 11 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))))
54	16	simp2d 1140	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
55	54	fveq2d 6898	. . . . . . . . . . . 12 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = (∗‘1))
56		1re 11244	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ
57		cjre 15119	. . . . . . . . . . . . 13 ⊢ (1 ∈ ℝ → (∗‘1) = 1)
58	56, 57	ax-mp 5	. . . . . . . . . . . 12 ⊢ (∗‘1) = 1
59	55, 58	eqtrdi 2781	. . . . . . . . . . 11 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = 1)
60	53, 59	eqtrd 2765	. . . . . . . . . 10 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
61	16	simp3d 1141	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
62	8, 42	sylan 578	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
63		cj0 15138	. . . . . . . . . . . . . . . . . 18 ⊢ (∗‘0) = 0
64	63	eqcomi 2734	. . . . . . . . . . . . . . . . 17 ⊢ 0 = (∗‘0)
65	64	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → 0 = (∗‘0))
66	62, 65	eqeq12d 2741	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (∗‘(𝑋‘𝑥)) = (∗‘0)))
67	8	ffvelcdmda 7091	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
68		0cn 11236	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℂ
69		cj11 15142	. . . . . . . . . . . . . . . 16 ⊢ (((𝑋‘𝑥) ∈ ℂ ∧ 0 ∈ ℂ) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
70	67, 68, 69	sylancl 584	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
71	66, 70	bitrd 278	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (𝑋‘𝑥) = 0))
72	71	necon3bid 2975	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) ≠ 0 ↔ (𝑋‘𝑥) ≠ 0))
73	72	imbi1d 340	. . . . . . . . . . . 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 3166	. . . . . . . . . . 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 256	. . . . . . . . . 10 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))(((∗ ∘ 𝑋)‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
76	48, 60, 75	3jca 1125	. . . . . . . . 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 27202	. . . . . . . . 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 711	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) ∈ 𝐷)
79	1, 2, 3, 4, 5, 78	dchrmul 27212	. . . . . . 7 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
80	79	adantr 479	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
81	80	fveq1d 6896	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥))
82	23	sseli 3973	. . . . . . . . 9 ⊢ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
83	82, 62	sylan2 591	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
84	83	oveq2d 7433	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
85	82, 67	sylan2 591	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
86	85	absvalsqd 15422	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
87	5	adantr 479	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 ∈ 𝐷)
88		simpr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
89	1, 3, 87, 2, 11, 88	dchrabs 27224	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (abs‘(𝑋‘𝑥)) = 1)
90	89	oveq1d 7432	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = (1↑2))
91		sq1 14191	. . . . . . . 8 ⊢ (1↑2) = 1
92	90, 91	eqtrdi 2781	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = 1)
93	84, 86, 92	3eqtr2d 2771	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = 1)
94	8	adantr 479	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
95	94	ffnd 6722	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)))
96	10	ffnd 6722	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
97	96	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
98		fvexd 6909	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (Base‘(ℤ/nℤ‘𝑁)) ∈ V)
99	82	adantl 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
100		fnfvof 7700	. . . . . . 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 837	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)))
102		eqid 2725	. . . . . . 7 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
103	13	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑁 ∈ ℕ)
104	1, 2, 102, 11, 103, 88	dchr1 27221	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((0_g‘𝐺)‘𝑥) = 1)
105	93, 101, 104	3eqtr4d 2775	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
106	81, 105	eqtrd 2765	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
107	106	ralrimiva 3136	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
108	1, 2, 3, 4, 5, 78	dchrmulcl 27213	. . . 4 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) ∈ 𝐷)
109	1	dchrabl 27218	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝐺 ∈ Abel)
110		ablgrp 19745	. . . . . 6 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
111	13, 109, 110	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp)
112	3, 102	grpidcl 18927	. . . . 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 27222	. . 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 256	. 2 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺))
116		dchrinv.i	. . . 4 ⊢ 𝐼 = (inv_g‘𝐺)
117	3, 4, 102, 116	grpinvid1 18953	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐷 ∧ (∗ ∘ 𝑋) ∈ 𝐷) → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
118	111, 5, 78, 117	syl3anc 1368	. 2 ⊢ (𝜑 → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
119	115, 118	mpbird 256	1 ⊢ (𝜑 → (𝐼‘𝑋) = (∗ ∘ 𝑋))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2930 ∀wral 3051 Vcvv 3463 ∘ ccom 5681 Fn wfn 6542 ⟶wf 6543 ‘cfv 6547 (class class class)co 7417 ∘_f cof 7681 ℂcc 11136 ℝcr 11137 0cc0 11138 1c1 11139 · cmul 11143 ℕcn 12242 2c2 12297 ℕ₀cn0 12502 ↑cexp 14059 ∗ccj 15076 abscabs 15214 Basecbs 17180 +_gcplusg 17233 ._rcmulr 17234 0_gc0g 17421 Grpcgrp 18895 inv_gcminusg 18896 Abelcabl 19741 1_rcur 20126 Ringcrg 20178 CRingccrg 20179 Unitcui 20299 ℤ/nℤczn 21433 DChrcdchr 27196

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 2166 ax-ext 2696 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5364 ax-pr 5428 ax-un 7739 ax-inf2 9664 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216 ax-addf 11217 ax-mulf 11218

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 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 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3775 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-pss 3965 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4909 df-int 4950 df-iun 4998 df-iin 4999 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 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 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6499 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-isom 6556 df-riota 7373 df-ov 7420 df-oprab 7421 df-mpo 7422 df-of 7683 df-om 7870 df-1st 7992 df-2nd 7993 df-supp 8164 df-tpos 8230 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-2o 8486 df-oadd 8489 df-omul 8490 df-er 8723 df-ec 8725 df-qs 8729 df-map 8845 df-pm 8846 df-ixp 8915 df-en 8963 df-dom 8964 df-sdom 8965 df-fin 8966 df-fsupp 9386 df-fi 9434 df-sup 9465 df-inf 9466 df-oi 9533 df-card 9962 df-acn 9965 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-4 12307 df-5 12308 df-6 12309 df-7 12310 df-8 12311 df-9 12312 df-n0 12503 df-z 12589 df-dec 12708 df-uz 12853 df-q 12963 df-rp 13007 df-xneg 13124 df-xadd 13125 df-xmul 13126 df-ioo 13360 df-ioc 13361 df-ico 13362 df-icc 13363 df-fz 13517 df-fzo 13660 df-fl 13790 df-mod 13868 df-seq 14000 df-exp 14060 df-fac 14266 df-bc 14295 df-hash 14323 df-shft 15047 df-cj 15079 df-re 15080 df-im 15081 df-sqrt 15215 df-abs 15216 df-limsup 15448 df-clim 15465 df-rlim 15466 df-sum 15666 df-ef 16044 df-sin 16046 df-cos 16047 df-pi 16049 df-dvds 16232 df-struct 17116 df-sets 17133 df-slot 17151 df-ndx 17163 df-base 17181 df-ress 17210 df-plusg 17246 df-mulr 17247 df-starv 17248 df-sca 17249 df-vsca 17250 df-ip 17251 df-tset 17252 df-ple 17253 df-ds 17255 df-unif 17256 df-hom 17257 df-cco 17258 df-rest 17404 df-topn 17405 df-0g 17423 df-gsum 17424 df-topgen 17425 df-pt 17426 df-prds 17429 df-xrs 17484 df-qtop 17489 df-imas 17490 df-qus 17491 df-xps 17492 df-mre 17566 df-mrc 17567 df-acs 17569 df-mgm 18600 df-sgrp 18679 df-mnd 18695 df-mhm 18740 df-submnd 18741 df-grp 18898 df-minusg 18899 df-sbg 18900 df-mulg 19029 df-subg 19083 df-nsg 19084 df-eqg 19085 df-ghm 19173 df-cntz 19273 df-od 19488 df-cmn 19742 df-abl 19743 df-mgp 20080 df-rng 20098 df-ur 20127 df-ring 20180 df-cring 20181 df-oppr 20278 df-dvdsr 20301 df-unit 20302 df-invr 20332 df-dvr 20345 df-rhm 20416 df-subrng 20488 df-subrg 20513 df-drng 20631 df-lmod 20750 df-lss 20821 df-lsp 20861 df-sra 21063 df-rgmod 21064 df-lidl 21109 df-rsp 21110 df-2idl 21149 df-psmet 21276 df-xmet 21277 df-met 21278 df-bl 21279 df-mopn 21280 df-fbas 21281 df-fg 21282 df-cnfld 21285 df-zring 21378 df-zrh 21434 df-zn 21437 df-top 22827 df-topon 22844 df-topsp 22866 df-bases 22880 df-cld 22954 df-ntr 22955 df-cls 22956 df-nei 23033 df-lp 23071 df-perf 23072 df-cn 23162 df-cnp 23163 df-haus 23250 df-tx 23497 df-hmeo 23690 df-fil 23781 df-fm 23873 df-flim 23874 df-flf 23875 df-xms 24257 df-ms 24258 df-tms 24259 df-cncf 24829 df-limc 25826 df-dv 25827 df-log 26521 df-cxp 26522 df-dchr 27197

This theorem is referenced by: dchr2sum 27237 dchrisum0re 27477

W3C validator