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Theorem dchrinv 26988

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 2732	. . . . . . . 8 ⊢ (ℤ/nℤ‘𝑁) = (ℤ/nℤ‘𝑁)
3		dchrabs.d	. . . . . . . 8 ⊢ 𝐷 = (Base‘𝐺)
4		eqid 2732	. . . . . . . 8 ⊢ (+_g‘𝐺) = (+_g‘𝐺)
5		dchrabs.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐷)
6		cjf 15055	. . . . . . . . . 10 ⊢ ∗:ℂ⟶ℂ
7		eqid 2732	. . . . . . . . . . 11 ⊢ (Base‘(ℤ/nℤ‘𝑁)) = (Base‘(ℤ/nℤ‘𝑁))
8	1, 2, 3, 7, 5	dchrf 26969	. . . . . . . . . 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 587	. . . . . . . . 9 ⊢ (𝜑 → (∗ ∘ 𝑋):(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
11		eqid 2732	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (Unit‘(ℤ/nℤ‘𝑁)) = (Unit‘(ℤ/nℤ‘𝑁))
12	1, 3	dchrrcl 26967	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 ∈ 𝐷 → 𝑁 ∈ ℕ)
13	5, 12	syl 17	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝑁 ∈ ℕ)
14	1, 2, 7, 11, 13, 3	dchrelbas3 26965	. . . . . . . . . . . . . . . . . . . 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 496	. . . . . . . . . . . . . . . . . 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 1142	. . . . . . . . . . . . . . . . 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 3248	. . . . . . . . . . . . . . . 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 3248	. . . . . . . . . . . . . . 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 467	. . . . . . . . . . . . . 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 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
23	7, 11	unitss 20267	. . . . . . . . . . . . . . . 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 3980	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
26	22, 25	ffvelcdmd 7087	. . . . . . . . . . . . . 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 3980	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁)))
29	22, 28	ffvelcdmd 7087	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑦) ∈ ℂ)
30	26, 29	cjmuld 15172	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (∗‘((𝑋‘𝑥) · (𝑋‘𝑦))) = ((∗‘(𝑋‘𝑥)) · (∗‘(𝑋‘𝑦))))
31	21, 30	eqtrd 2772	. . . . . . . . . . . 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 12536	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
33	2	zncrng 21319	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ → (ℤ/nℤ‘𝑁) ∈ CRing)
34		crngring 20139	. . . . . . . . . . . . . . . 16 ⊢ ((ℤ/nℤ‘𝑁) ∈ CRing → (ℤ/nℤ‘𝑁) ∈ Ring)
35	32, 33, 34	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℤ/nℤ‘𝑁) ∈ Ring)
36	35	adantr 481	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (ℤ/nℤ‘𝑁) ∈ Ring)
37		eqid 2732	. . . . . . . . . . . . . . 15 ⊢ (._r‘(ℤ/nℤ‘𝑁)) = (._r‘(ℤ/nℤ‘𝑁))
38	7, 37	ringcl 20144	. . . . . . . . . . . . . 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 1371	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑥(._r‘(ℤ/nℤ‘𝑁))𝑦) ∈ (Base‘(ℤ/nℤ‘𝑁)))
40		fvco3 6990	. . . . . . . . . . . . 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 584	. . . . . . . . . . . 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 6990	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
43	22, 25, 42	syl2anc 584	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
44		fvco3 6990	. . . . . . . . . . . . . 14 ⊢ ((𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ ∧ 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
45	22, 28, 44	syl2anc 584	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → ((∗ ∘ 𝑋)‘𝑦) = (∗‘(𝑋‘𝑦)))
46	43, 45	oveq12d 7429	. . . . . . . . . . . 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 2782	. . . . . . . . . . 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 3200	. . . . . . . . . 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 2732	. . . . . . . . . . . . . 14 ⊢ (1_r‘(ℤ/nℤ‘𝑁)) = (1_r‘(ℤ/nℤ‘𝑁))
50	7, 49	ringidcl 20154	. . . . . . . . . . . . 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 6990	. . . . . . . . . . . 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 584	. . . . . . . . . . 11 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))))
54	16	simp2d 1143	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
55	54	fveq2d 6895	. . . . . . . . . . . 12 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = (∗‘1))
56		1re 11218	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ
57		cjre 15090	. . . . . . . . . . . . 13 ⊢ (1 ∈ ℝ → (∗‘1) = 1)
58	56, 57	ax-mp 5	. . . . . . . . . . . 12 ⊢ (∗‘1) = 1
59	55, 58	eqtrdi 2788	. . . . . . . . . . 11 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = 1)
60	53, 59	eqtrd 2772	. . . . . . . . . 10 ⊢ (𝜑 → ((∗ ∘ 𝑋)‘(1_r‘(ℤ/nℤ‘𝑁))) = 1)
61	16	simp3d 1144	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))((𝑋‘𝑥) ≠ 0 → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))))
62	8, 42	sylan 580	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
63		cj0 15109	. . . . . . . . . . . . . . . . . 18 ⊢ (∗‘0) = 0
64	63	eqcomi 2741	. . . . . . . . . . . . . . . . 17 ⊢ 0 = (∗‘0)
65	64	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → 0 = (∗‘0))
66	62, 65	eqeq12d 2748	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (((∗ ∘ 𝑋)‘𝑥) = 0 ↔ (∗‘(𝑋‘𝑥)) = (∗‘0)))
67	8	ffvelcdmda 7086	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
68		0cn 11210	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℂ
69		cj11 15113	. . . . . . . . . . . . . . . 16 ⊢ (((𝑋‘𝑥) ∈ ℂ ∧ 0 ∈ ℂ) → ((∗‘(𝑋‘𝑥)) = (∗‘0) ↔ (𝑋‘𝑥) = 0))
70	67, 68, 69	sylancl 586	. . . . . . . . . . . . . . 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 2985	. . . . . . . . . . . . 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 3175	. . . . . . . . . . 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 1128	. . . . . . . . 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 26965	. . . . . . . . 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 26975	. . . . . . 7 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (𝑋 ∘_f · (∗ ∘ 𝑋)))
80	79	adantr 481	. . . . . 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 3978	. . . . . . . . 9 ⊢ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
83	82, 62	sylan2 593	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((∗ ∘ 𝑋)‘𝑥) = (∗‘(𝑋‘𝑥)))
84	83	oveq2d 7427	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
85	82, 67	sylan2 593	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
86	85	absvalsqd 15393	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = ((𝑋‘𝑥) · (∗‘(𝑋‘𝑥))))
87	5	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 ∈ 𝐷)
88		simpr 485	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)))
89	1, 3, 87, 2, 11, 88	dchrabs 26987	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (abs‘(𝑋‘𝑥)) = 1)
90	89	oveq1d 7426	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = (1↑2))
91		sq1 14163	. . . . . . . 8 ⊢ (1↑2) = 1
92	90, 91	eqtrdi 2788	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = 1)
93	84, 86, 92	3eqtr2d 2778	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋‘𝑥) · ((∗ ∘ 𝑋)‘𝑥)) = 1)
94	8	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
95	94	ffnd 6718	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)))
96	10	ffnd 6718	. . . . . . . 8 ⊢ (𝜑 → (∗ ∘ 𝑋) Fn (Base‘(ℤ/nℤ‘𝑁)))
97	96	adantr 481	. . . . . . 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 482	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
100		fnfvof 7689	. . . . . . 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 2732	. . . . . . 7 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
103	13	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑁 ∈ ℕ)
104	1, 2, 102, 11, 103, 88	dchr1 26984	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((0_g‘𝐺)‘𝑥) = 1)
105	93, 101, 104	3eqtr4d 2782	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
106	81, 105	eqtrd 2772	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
107	106	ralrimiva 3146	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((0_g‘𝐺)‘𝑥))
108	1, 2, 3, 4, 5, 78	dchrmulcl 26976	. . . 4 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) ∈ 𝐷)
109	1	dchrabl 26981	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝐺 ∈ Abel)
110		ablgrp 19694	. . . . . 6 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
111	13, 109, 110	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp)
112	3, 102	grpidcl 18886	. . . . 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 26985	. . 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 18912	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐷 ∧ (∗ ∘ 𝑋) ∈ 𝐷) → ((𝐼‘𝑋) = (∗ ∘ 𝑋) ↔ (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) = (0_g‘𝐺)))
118	111, 5, 78, 117	syl3anc 1371	. 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 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 Vcvv 3474 ∘ ccom 5680 Fn wfn 6538 ⟶wf 6539 ‘cfv 6543 (class class class)co 7411 ∘_f cof 7670 ℂcc 11110 ℝcr 11111 0cc0 11112 1c1 11113 · cmul 11117 ℕcn 12216 2c2 12271 ℕ₀cn0 12476 ↑cexp 14031 ∗ccj 15047 abscabs 15185 Basecbs 17148 +_gcplusg 17201 ._rcmulr 17202 0_gc0g 17389 Grpcgrp 18855 inv_gcminusg 18856 Abelcabl 19690 1_rcur 20075 Ringcrg 20127 CRingccrg 20128 Unitcui 20246 ℤ/nℤczn 21271 DChrcdchr 26959

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 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 ax-mulf 11192

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-tpos 8213 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-oadd 8472 df-omul 8473 df-er 8705 df-ec 8707 df-qs 8711 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-acn 9939 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 12979 df-xneg 13096 df-xadd 13097 df-xmul 13098 df-ioo 13332 df-ioc 13333 df-ico 13334 df-icc 13335 df-fz 13489 df-fzo 13632 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-fac 14238 df-bc 14267 df-hash 14295 df-shft 15018 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-limsup 15419 df-clim 15436 df-rlim 15437 df-sum 15637 df-ef 16015 df-sin 16017 df-cos 16018 df-pi 16020 df-dvds 16202 df-struct 17084 df-sets 17101 df-slot 17119 df-ndx 17131 df-base 17149 df-ress 17178 df-plusg 17214 df-mulr 17215 df-starv 17216 df-sca 17217 df-vsca 17218 df-ip 17219 df-tset 17220 df-ple 17221 df-ds 17223 df-unif 17224 df-hom 17225 df-cco 17226 df-rest 17372 df-topn 17373 df-0g 17391 df-gsum 17392 df-topgen 17393 df-pt 17394 df-prds 17397 df-xrs 17452 df-qtop 17457 df-imas 17458 df-qus 17459 df-xps 17460 df-mre 17534 df-mrc 17535 df-acs 17537 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-mhm 18705 df-submnd 18706 df-grp 18858 df-minusg 18859 df-sbg 18860 df-mulg 18987 df-subg 19039 df-nsg 19040 df-eqg 19041 df-ghm 19128 df-cntz 19222 df-od 19437 df-cmn 19691 df-abl 19692 df-mgp 20029 df-rng 20047 df-ur 20076 df-ring 20129 df-cring 20130 df-oppr 20225 df-dvdsr 20248 df-unit 20249 df-invr 20279 df-dvr 20292 df-rhm 20363 df-subrng 20434 df-subrg 20459 df-drng 20502 df-lmod 20616 df-lss 20687 df-lsp 20727 df-sra 20930 df-rgmod 20931 df-lidl 20932 df-rsp 20933 df-2idl 21006 df-psmet 21136 df-xmet 21137 df-met 21138 df-bl 21139 df-mopn 21140 df-fbas 21141 df-fg 21142 df-cnfld 21145 df-zring 21218 df-zrh 21272 df-zn 21275 df-top 22616 df-topon 22633 df-topsp 22655 df-bases 22669 df-cld 22743 df-ntr 22744 df-cls 22745 df-nei 22822 df-lp 22860 df-perf 22861 df-cn 22951 df-cnp 22952 df-haus 23039 df-tx 23286 df-hmeo 23479 df-fil 23570 df-fm 23662 df-flim 23663 df-flf 23664 df-xms 24046 df-ms 24047 df-tms 24048 df-cncf 24618 df-limc 25607 df-dv 25608 df-log 26289 df-cxp 26290 df-dchr 26960

This theorem is referenced by: dchr2sum 27000 dchrisum0re 27240

W3C validator