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Theorem dchrinv 26753

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 15047	. . . . . . . . . 10 ⊢ ∗:ℂ⟶ℂ
7		eqid 2732	. . . . . . . . . . 11 ⊢ (Base‘(ℤ/nℤ‘𝑁)) = (Base‘(ℤ/nℤ‘𝑁))
8	1, 2, 3, 7, 5	dchrf 26734	. . . . . . . . . 10 ⊢ (𝜑 → 𝑋:(Base‘(ℤ/nℤ‘𝑁))⟶ℂ)
9		fco 6738	. . . . . . . . . 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 26732	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 ∈ 𝐷 → 𝑁 ∈ ℕ)
13	5, 12	syl 17	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → 𝑁 ∈ ℕ)
14	1, 2, 7, 11, 13, 3	dchrelbas3 26730	. . . . . . . . . . . . . . . . . . . 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 6892	. . . . . . . . . . . . 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 20182	. . . . . . . . . . . . . . . 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 3979	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁)))
26	22, 25	ffvelcdmd 7084	. . . . . . . . . . . . . 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 3979	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → 𝑦 ∈ (Base‘(ℤ/nℤ‘𝑁)))
29	22, 28	ffvelcdmd 7084	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁)) ∧ 𝑦 ∈ (Unit‘(ℤ/nℤ‘𝑁)))) → (𝑋‘𝑦) ∈ ℂ)
30	26, 29	cjmuld 15164	. . . . . . . . . . . . 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 12528	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
33	2	zncrng 21091	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ → (ℤ/nℤ‘𝑁) ∈ CRing)
34		crngring 20061	. . . . . . . . . . . . . . . 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 20066	. . . . . . . . . . . . . 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 6987	. . . . . . . . . . . . 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 6987	. . . . . . . . . . . . . 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 6987	. . . . . . . . . . . . . 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 7423	. . . . . . . . . . . 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 20076	. . . . . . . . . . . . 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 6987	. . . . . . . . . . . 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 6892	. . . . . . . . . . . 12 ⊢ (𝜑 → (∗‘(𝑋‘(1_r‘(ℤ/nℤ‘𝑁)))) = (∗‘1))
56		1re 11210	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℝ
57		cjre 15082	. . . . . . . . . . . . 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 15101	. . . . . . . . . . . . . . . . . 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 7083	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘(ℤ/nℤ‘𝑁))) → (𝑋‘𝑥) ∈ ℂ)
68		0cn 11202	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℂ
69		cj11 15105	. . . . . . . . . . . . . . . 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 26730	. . . . . . . . 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 26740	. . . . . . 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 6890	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((𝑋(+_g‘𝐺)(∗ ∘ 𝑋))‘𝑥) = ((𝑋 ∘_f · (∗ ∘ 𝑋))‘𝑥))
82	23	sseli 3977	. . . . . . . . 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 7421	. . . . . . 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 15385	. . . . . . 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 26752	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → (abs‘(𝑋‘𝑥)) = 1)
90	89	oveq1d 7420	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → ((abs‘(𝑋‘𝑥))↑2) = (1↑2))
91		sq1 14155	. . . . . . . 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 6715	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (Unit‘(ℤ/nℤ‘𝑁))) → 𝑋 Fn (Base‘(ℤ/nℤ‘𝑁)))
96	10	ffnd 6715	. . . . . . . 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 6903	. . . . . . 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 7683	. . . . . . 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 26749	. . . . . 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 26741	. . . 4 ⊢ (𝜑 → (𝑋(+_g‘𝐺)(∗ ∘ 𝑋)) ∈ 𝐷)
109	1	dchrabl 26746	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝐺 ∈ Abel)
110		ablgrp 19647	. . . . . 6 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
111	13, 109, 110	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp)
112	3, 102	grpidcl 18846	. . . . 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 26750	. . 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 18872	. . 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 5679 Fn wfn 6535 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 ∘_f cof 7664 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 · cmul 11111 ℕcn 12208 2c2 12263 ℕ₀cn0 12468 ↑cexp 14023 ∗ccj 15039 abscabs 15177 Basecbs 17140 +_gcplusg 17193 ._rcmulr 17194 0_gc0g 17381 Grpcgrp 18815 inv_gcminusg 18816 Abelcabl 19643 1_rcur 19998 Ringcrg 20049 CRingccrg 20050 Unitcui 20161 ℤ/nℤczn 21043 DChrcdchr 26724

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 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-inf2 9632 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186

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 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-disj 5113 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-tpos 8207 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-oadd 8466 df-omul 8467 df-er 8699 df-ec 8701 df-qs 8705 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-fi 9402 df-sup 9433 df-inf 9434 df-oi 9501 df-card 9930 df-acn 9933 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ioc 13325 df-ico 13326 df-icc 13327 df-fz 13481 df-fzo 13624 df-fl 13753 df-mod 13831 df-seq 13963 df-exp 14024 df-fac 14230 df-bc 14259 df-hash 14287 df-shft 15010 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-limsup 15411 df-clim 15428 df-rlim 15429 df-sum 15629 df-ef 16007 df-sin 16009 df-cos 16010 df-pi 16012 df-dvds 16194 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-hom 17217 df-cco 17218 df-rest 17364 df-topn 17365 df-0g 17383 df-gsum 17384 df-topgen 17385 df-pt 17386 df-prds 17389 df-xrs 17444 df-qtop 17449 df-imas 17450 df-qus 17451 df-xps 17452 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-submnd 18668 df-grp 18818 df-minusg 18819 df-sbg 18820 df-mulg 18945 df-subg 18997 df-nsg 18998 df-eqg 18999 df-ghm 19084 df-cntz 19175 df-od 19390 df-cmn 19644 df-abl 19645 df-mgp 19982 df-ur 19999 df-ring 20051 df-cring 20052 df-oppr 20142 df-dvdsr 20163 df-unit 20164 df-invr 20194 df-dvr 20207 df-rnghom 20243 df-drng 20309 df-subrg 20353 df-lmod 20465 df-lss 20535 df-lsp 20575 df-sra 20777 df-rgmod 20778 df-lidl 20779 df-rsp 20780 df-2idl 20849 df-psmet 20928 df-xmet 20929 df-met 20930 df-bl 20931 df-mopn 20932 df-fbas 20933 df-fg 20934 df-cnfld 20937 df-zring 21010 df-zrh 21044 df-zn 21047 df-top 22387 df-topon 22404 df-topsp 22426 df-bases 22440 df-cld 22514 df-ntr 22515 df-cls 22516 df-nei 22593 df-lp 22631 df-perf 22632 df-cn 22722 df-cnp 22723 df-haus 22810 df-tx 23057 df-hmeo 23250 df-fil 23341 df-fm 23433 df-flim 23434 df-flf 23435 df-xms 23817 df-ms 23818 df-tms 23819 df-cncf 24385 df-limc 25374 df-dv 25375 df-log 26056 df-cxp 26057 df-dchr 26725

This theorem is referenced by: dchr2sum 26765 dchrisum0re 27005

W3C validator