qqhval2lem - Mathbox for Thierry Arnoux

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Theorem qqhval2lem 33638

Description: Lemma for qqhval2 33639. (Contributed by Thierry Arnoux, 29-Oct-2017.)

**Hypotheses**
Ref	Expression
qqhval2.0	⊢ 𝐵 = (Base‘𝑅)
qqhval2.1	⊢ / = (/_r‘𝑅)
qqhval2.2	⊢ 𝐿 = (ℤRHom‘𝑅)

**Assertion**
Ref	Expression
qqhval2lem	⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))) = ((𝐿‘𝑋) / (𝐿‘𝑌)))

**Proof of Theorem qqhval2lem**
Step	Hyp	Ref	Expression
1		drngring 20633	. . . . 5 ⊢ (𝑅 ∈ DivRing → 𝑅 ∈ Ring)
2		qqhval2.2	. . . . . 6 ⊢ 𝐿 = (ℤRHom‘𝑅)
3	2	zrhrhm 21439	. . . . 5 ⊢ (𝑅 ∈ Ring → 𝐿 ∈ (ℤ_ring RingHom 𝑅))
4	1, 3	syl 17	. . . 4 ⊢ (𝑅 ∈ DivRing → 𝐿 ∈ (ℤ_ring RingHom 𝑅))
5	4	ad2antrr 724	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝐿 ∈ (ℤ_ring RingHom 𝑅))
6		simpr1 1191	. . . . . 6 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑋 ∈ ℤ)
7		simpr2 1192	. . . . . 6 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑌 ∈ ℤ)
8	6, 7	gcdcld 16480	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ∈ ℕ₀)
9	8	nn0zd 12612	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ∈ ℤ)
10		simpr3 1193	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑌 ≠ 0)
11		gcdeq0 16489	. . . . . . . . 9 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) → ((𝑋 gcd 𝑌) = 0 ↔ (𝑋 = 0 ∧ 𝑌 = 0)))
12	11	simplbda 498	. . . . . . . 8 ⊢ (((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) ∧ (𝑋 gcd 𝑌) = 0) → 𝑌 = 0)
13	12	ex 411	. . . . . . 7 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) → ((𝑋 gcd 𝑌) = 0 → 𝑌 = 0))
14	13	necon3d 2951	. . . . . 6 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) → (𝑌 ≠ 0 → (𝑋 gcd 𝑌) ≠ 0))
15	14	imp 405	. . . . 5 ⊢ (((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) ∧ 𝑌 ≠ 0) → (𝑋 gcd 𝑌) ≠ 0)
16	6, 7, 10, 15	syl21anc 836	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ≠ 0)
17		gcddvds 16475	. . . . . 6 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ) → ((𝑋 gcd 𝑌) ∥ 𝑋 ∧ (𝑋 gcd 𝑌) ∥ 𝑌))
18	6, 7, 17	syl2anc 582	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝑋 gcd 𝑌) ∥ 𝑋 ∧ (𝑋 gcd 𝑌) ∥ 𝑌))
19	18	simpld 493	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ∥ 𝑋)
20		dvdsval2 16231	. . . . 5 ⊢ (((𝑋 gcd 𝑌) ∈ ℤ ∧ (𝑋 gcd 𝑌) ≠ 0 ∧ 𝑋 ∈ ℤ) → ((𝑋 gcd 𝑌) ∥ 𝑋 ↔ (𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ))
21	20	biimpa 475	. . . 4 ⊢ ((((𝑋 gcd 𝑌) ∈ ℤ ∧ (𝑋 gcd 𝑌) ≠ 0 ∧ 𝑋 ∈ ℤ) ∧ (𝑋 gcd 𝑌) ∥ 𝑋) → (𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ)
22	9, 16, 6, 19, 21	syl31anc 1370	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ)
23	18	simprd 494	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ∥ 𝑌)
24		dvdsval2 16231	. . . . 5 ⊢ (((𝑋 gcd 𝑌) ∈ ℤ ∧ (𝑋 gcd 𝑌) ≠ 0 ∧ 𝑌 ∈ ℤ) → ((𝑋 gcd 𝑌) ∥ 𝑌 ↔ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ))
25	24	biimpa 475	. . . 4 ⊢ ((((𝑋 gcd 𝑌) ∈ ℤ ∧ (𝑋 gcd 𝑌) ≠ 0 ∧ 𝑌 ∈ ℤ) ∧ (𝑋 gcd 𝑌) ∥ 𝑌) → (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ)
26	9, 16, 7, 23, 25	syl31anc 1370	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ)
27		zringbas 21381	. . . . . . 7 ⊢ ℤ = (Base‘ℤ_ring)
28		qqhval2.0	. . . . . . 7 ⊢ 𝐵 = (Base‘𝑅)
29	27, 28	rhmf 20426	. . . . . 6 ⊢ (𝐿 ∈ (ℤ_ring RingHom 𝑅) → 𝐿:ℤ⟶𝐵)
30	5, 29	syl 17	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝐿:ℤ⟶𝐵)
31	30, 26	ffvelcdmd 7089	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ 𝐵)
32	30	ffnd 6717	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝐿 Fn ℤ)
33	7	zcnd 12695	. . . . . . . 8 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑌 ∈ ℂ)
34	9	zcnd 12695	. . . . . . . 8 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑋 gcd 𝑌) ∈ ℂ)
35	33, 34, 10, 16	divne0d 12034	. . . . . . 7 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑌 / (𝑋 gcd 𝑌)) ≠ 0)
36		ovex 7448	. . . . . . . . 9 ⊢ (𝑌 / (𝑋 gcd 𝑌)) ∈ V
37	36	elsn 4639	. . . . . . . 8 ⊢ ((𝑌 / (𝑋 gcd 𝑌)) ∈ {0} ↔ (𝑌 / (𝑋 gcd 𝑌)) = 0)
38	37	necon3bbii 2978	. . . . . . 7 ⊢ (¬ (𝑌 / (𝑋 gcd 𝑌)) ∈ {0} ↔ (𝑌 / (𝑋 gcd 𝑌)) ≠ 0)
39	35, 38	sylibr 233	. . . . . 6 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ¬ (𝑌 / (𝑋 gcd 𝑌)) ∈ {0})
40	1	ad2antrr 724	. . . . . . 7 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑅 ∈ Ring)
41		simplr 767	. . . . . . 7 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (chr‘𝑅) = 0)
42		eqid 2725	. . . . . . . . 9 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
43	28, 2, 42	zrhker 33634	. . . . . . . 8 ⊢ (𝑅 ∈ Ring → ((chr‘𝑅) = 0 ↔ (^◡𝐿 “ {(0_g‘𝑅)}) = {0}))
44	43	biimpa 475	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (chr‘𝑅) = 0) → (^◡𝐿 “ {(0_g‘𝑅)}) = {0})
45	40, 41, 44	syl2anc 582	. . . . . 6 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (^◡𝐿 “ {(0_g‘𝑅)}) = {0})
46	39, 45	neleqtrrd 2848	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ¬ (𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)}))
47		elpreima 7061	. . . . . . . . 9 ⊢ (𝐿 Fn ℤ → ((𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)}) ↔ ((𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ ∧ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)})))
48	47	baibd 538	. . . . . . . 8 ⊢ ((𝐿 Fn ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ) → ((𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)}) ↔ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)}))
49	48	biimprd 247	. . . . . . 7 ⊢ ((𝐿 Fn ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ) → ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)} → (𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)})))
50	49	con3dimp 407	. . . . . 6 ⊢ (((𝐿 Fn ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ) ∧ ¬ (𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)})) → ¬ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)})
51		fvex 6904	. . . . . . . 8 ⊢ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ V
52	51	elsn 4639	. . . . . . 7 ⊢ ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)} ↔ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) = (0_g‘𝑅))
53	52	necon3bbii 2978	. . . . . 6 ⊢ (¬ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ {(0_g‘𝑅)} ↔ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ≠ (0_g‘𝑅))
54	50, 53	sylib 217	. . . . 5 ⊢ (((𝐿 Fn ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ) ∧ ¬ (𝑌 / (𝑋 gcd 𝑌)) ∈ (^◡𝐿 “ {(0_g‘𝑅)})) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ≠ (0_g‘𝑅))
55	32, 26, 46, 54	syl21anc 836	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ≠ (0_g‘𝑅))
56		eqid 2725	. . . . . 6 ⊢ (Unit‘𝑅) = (Unit‘𝑅)
57	28, 56, 42	drngunit 20631	. . . . 5 ⊢ (𝑅 ∈ DivRing → ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅) ↔ ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ 𝐵 ∧ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ≠ (0_g‘𝑅))))
58	57	ad2antrr 724	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅) ↔ ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ 𝐵 ∧ (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ≠ (0_g‘𝑅))))
59	31, 55, 58	mpbir2and 711	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅))
60	30, 9	ffvelcdmd 7089	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑋 gcd 𝑌)) ∈ 𝐵)
61		ovex 7448	. . . . . . . . 9 ⊢ (𝑋 gcd 𝑌) ∈ V
62	61	elsn 4639	. . . . . . . 8 ⊢ ((𝑋 gcd 𝑌) ∈ {0} ↔ (𝑋 gcd 𝑌) = 0)
63	62	necon3bbii 2978	. . . . . . 7 ⊢ (¬ (𝑋 gcd 𝑌) ∈ {0} ↔ (𝑋 gcd 𝑌) ≠ 0)
64	16, 63	sylibr 233	. . . . . 6 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ¬ (𝑋 gcd 𝑌) ∈ {0})
65	64, 45	neleqtrrd 2848	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ¬ (𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)}))
66		elpreima 7061	. . . . . . . . 9 ⊢ (𝐿 Fn ℤ → ((𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)}) ↔ ((𝑋 gcd 𝑌) ∈ ℤ ∧ (𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)})))
67	66	baibd 538	. . . . . . . 8 ⊢ ((𝐿 Fn ℤ ∧ (𝑋 gcd 𝑌) ∈ ℤ) → ((𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)}) ↔ (𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)}))
68	67	biimprd 247	. . . . . . 7 ⊢ ((𝐿 Fn ℤ ∧ (𝑋 gcd 𝑌) ∈ ℤ) → ((𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)} → (𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)})))
69	68	con3dimp 407	. . . . . 6 ⊢ (((𝐿 Fn ℤ ∧ (𝑋 gcd 𝑌) ∈ ℤ) ∧ ¬ (𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)})) → ¬ (𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)})
70		fvex 6904	. . . . . . . 8 ⊢ (𝐿‘(𝑋 gcd 𝑌)) ∈ V
71	70	elsn 4639	. . . . . . 7 ⊢ ((𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)} ↔ (𝐿‘(𝑋 gcd 𝑌)) = (0_g‘𝑅))
72	71	necon3bbii 2978	. . . . . 6 ⊢ (¬ (𝐿‘(𝑋 gcd 𝑌)) ∈ {(0_g‘𝑅)} ↔ (𝐿‘(𝑋 gcd 𝑌)) ≠ (0_g‘𝑅))
73	69, 72	sylib 217	. . . . 5 ⊢ (((𝐿 Fn ℤ ∧ (𝑋 gcd 𝑌) ∈ ℤ) ∧ ¬ (𝑋 gcd 𝑌) ∈ (^◡𝐿 “ {(0_g‘𝑅)})) → (𝐿‘(𝑋 gcd 𝑌)) ≠ (0_g‘𝑅))
74	32, 9, 65, 73	syl21anc 836	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑋 gcd 𝑌)) ≠ (0_g‘𝑅))
75	28, 56, 42	drngunit 20631	. . . . 5 ⊢ (𝑅 ∈ DivRing → ((𝐿‘(𝑋 gcd 𝑌)) ∈ (Unit‘𝑅) ↔ ((𝐿‘(𝑋 gcd 𝑌)) ∈ 𝐵 ∧ (𝐿‘(𝑋 gcd 𝑌)) ≠ (0_g‘𝑅))))
76	75	ad2antrr 724	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(𝑋 gcd 𝑌)) ∈ (Unit‘𝑅) ↔ ((𝐿‘(𝑋 gcd 𝑌)) ∈ 𝐵 ∧ (𝐿‘(𝑋 gcd 𝑌)) ≠ (0_g‘𝑅))))
77	60, 74, 76	mpbir2and 711	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘(𝑋 gcd 𝑌)) ∈ (Unit‘𝑅))
78		qqhval2.1	. . . 4 ⊢ / = (/_r‘𝑅)
79		zringmulr 21385	. . . 4 ⊢ · = (._r‘ℤ_ring)
80	56, 27, 78, 79	rhmdvd 33079	. . 3 ⊢ ((𝐿 ∈ (ℤ_ring RingHom 𝑅) ∧ ((𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ ∧ (𝑋 gcd 𝑌) ∈ ℤ) ∧ ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅) ∧ (𝐿‘(𝑋 gcd 𝑌)) ∈ (Unit‘𝑅))) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌))) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌)))))
81	5, 22, 26, 9, 59, 77, 80	syl132anc 1385	. 2 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌))) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌)))))
82		divnumden 16717	. . . . . . . 8 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℕ) → ((numer‘(𝑋 / 𝑌)) = (𝑋 / (𝑋 gcd 𝑌)) ∧ (denom‘(𝑋 / 𝑌)) = (𝑌 / (𝑋 gcd 𝑌))))
83	6, 82	sylan 578	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → ((numer‘(𝑋 / 𝑌)) = (𝑋 / (𝑋 gcd 𝑌)) ∧ (denom‘(𝑋 / 𝑌)) = (𝑌 / (𝑋 gcd 𝑌))))
84	83	simpld 493	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (numer‘(𝑋 / 𝑌)) = (𝑋 / (𝑋 gcd 𝑌)))
85	84	eqcomd 2731	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (𝑋 / (𝑋 gcd 𝑌)) = (numer‘(𝑋 / 𝑌)))
86	85	fveq2d 6895	. . . 4 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (𝐿‘(𝑋 / (𝑋 gcd 𝑌))) = (𝐿‘(numer‘(𝑋 / 𝑌))))
87	83	simprd 494	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (denom‘(𝑋 / 𝑌)) = (𝑌 / (𝑋 gcd 𝑌)))
88	87	eqcomd 2731	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (𝑌 / (𝑋 gcd 𝑌)) = (denom‘(𝑋 / 𝑌)))
89	88	fveq2d 6895	. . . 4 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) = (𝐿‘(denom‘(𝑋 / 𝑌))))
90	86, 89	oveq12d 7433	. . 3 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ 𝑌 ∈ ℕ) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))))
91	22	adantr 479	. . . . . . . . 9 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ)
92	91	zcnd 12695	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝑋 / (𝑋 gcd 𝑌)) ∈ ℂ)
93	92	mulm1d 11694	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (-1 · (𝑋 / (𝑋 gcd 𝑌))) = -(𝑋 / (𝑋 gcd 𝑌)))
94		neg1cn 12354	. . . . . . . . 9 ⊢ -1 ∈ ℂ
95	94	a1i 11	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -1 ∈ ℂ)
96	95, 92	mulcomd 11263	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (-1 · (𝑋 / (𝑋 gcd 𝑌))) = ((𝑋 / (𝑋 gcd 𝑌)) · -1))
97	93, 96	eqtr3d 2767	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -(𝑋 / (𝑋 gcd 𝑌)) = ((𝑋 / (𝑋 gcd 𝑌)) · -1))
98	97	fveq2d 6895	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘-(𝑋 / (𝑋 gcd 𝑌))) = (𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · -1)))
99	26	adantr 479	. . . . . . . . 9 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ)
100	99	zcnd 12695	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝑌 / (𝑋 gcd 𝑌)) ∈ ℂ)
101	100	mulm1d 11694	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (-1 · (𝑌 / (𝑋 gcd 𝑌))) = -(𝑌 / (𝑋 gcd 𝑌)))
102	95, 100	mulcomd 11263	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (-1 · (𝑌 / (𝑋 gcd 𝑌))) = ((𝑌 / (𝑋 gcd 𝑌)) · -1))
103	101, 102	eqtr3d 2767	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -(𝑌 / (𝑋 gcd 𝑌)) = ((𝑌 / (𝑋 gcd 𝑌)) · -1))
104	103	fveq2d 6895	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘-(𝑌 / (𝑋 gcd 𝑌))) = (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · -1)))
105	98, 104	oveq12d 7433	. . . 4 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → ((𝐿‘-(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘-(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · -1)) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · -1))))
106	6	adantr 479	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → 𝑋 ∈ ℤ)
107	7	adantr 479	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → 𝑌 ∈ ℤ)
108		simpr 483	. . . . . . . 8 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -𝑌 ∈ ℕ)
109		divnumden2 32624	. . . . . . . 8 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ -𝑌 ∈ ℕ) → ((numer‘(𝑋 / 𝑌)) = -(𝑋 / (𝑋 gcd 𝑌)) ∧ (denom‘(𝑋 / 𝑌)) = -(𝑌 / (𝑋 gcd 𝑌))))
110	106, 107, 108, 109	syl3anc 1368	. . . . . . 7 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → ((numer‘(𝑋 / 𝑌)) = -(𝑋 / (𝑋 gcd 𝑌)) ∧ (denom‘(𝑋 / 𝑌)) = -(𝑌 / (𝑋 gcd 𝑌))))
111	110	simpld 493	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (numer‘(𝑋 / 𝑌)) = -(𝑋 / (𝑋 gcd 𝑌)))
112	111	fveq2d 6895	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘(numer‘(𝑋 / 𝑌))) = (𝐿‘-(𝑋 / (𝑋 gcd 𝑌))))
113	110	simprd 494	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (denom‘(𝑋 / 𝑌)) = -(𝑌 / (𝑋 gcd 𝑌)))
114	113	fveq2d 6895	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘(denom‘(𝑋 / 𝑌))) = (𝐿‘-(𝑌 / (𝑋 gcd 𝑌))))
115	112, 114	oveq12d 7433	. . . 4 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))) = ((𝐿‘-(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘-(𝑌 / (𝑋 gcd 𝑌)))))
116	5	adantr 479	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → 𝐿 ∈ (ℤ_ring RingHom 𝑅))
117		1zzd 12621	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → 1 ∈ ℤ)
118	117	znegcld 12696	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -1 ∈ ℤ)
119	59	adantr 479	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅))
120		neg1z 12626	. . . . . . . 8 ⊢ -1 ∈ ℤ
121		ax-1cn 11194	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
122	121	absnegi 15377	. . . . . . . . 9 ⊢ (abs‘-1) = (abs‘1)
123		abs1 15274	. . . . . . . . 9 ⊢ (abs‘1) = 1
124	122, 123	eqtri 2753	. . . . . . . 8 ⊢ (abs‘-1) = 1
125		zringunit 21394	. . . . . . . 8 ⊢ (-1 ∈ (Unit‘ℤ_ring) ↔ (-1 ∈ ℤ ∧ (abs‘-1) = 1))
126	120, 124, 125	mpbir2an 709	. . . . . . 7 ⊢ -1 ∈ (Unit‘ℤ_ring)
127	126	a1i 11	. . . . . 6 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → -1 ∈ (Unit‘ℤ_ring))
128		elrhmunit 20451	. . . . . 6 ⊢ ((𝐿 ∈ (ℤ_ring RingHom 𝑅) ∧ -1 ∈ (Unit‘ℤ_ring)) → (𝐿‘-1) ∈ (Unit‘𝑅))
129	116, 127, 128	syl2anc 582	. . . . 5 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → (𝐿‘-1) ∈ (Unit‘𝑅))
130	56, 27, 78, 79	rhmdvd 33079	. . . . 5 ⊢ ((𝐿 ∈ (ℤ_ring RingHom 𝑅) ∧ ((𝑋 / (𝑋 gcd 𝑌)) ∈ ℤ ∧ (𝑌 / (𝑋 gcd 𝑌)) ∈ ℤ ∧ -1 ∈ ℤ) ∧ ((𝐿‘(𝑌 / (𝑋 gcd 𝑌))) ∈ (Unit‘𝑅) ∧ (𝐿‘-1) ∈ (Unit‘𝑅))) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · -1)) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · -1))))
131	116, 91, 99, 118, 119, 129, 130	syl132anc 1385	. . . 4 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · -1)) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · -1))))
132	105, 115, 131	3eqtr4rd 2776	. . 3 ⊢ ((((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) ∧ -𝑌 ∈ ℕ) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))))
133		simp3 1135	. . . . . 6 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → 𝑌 ≠ 0)
134	133	neneqd 2935	. . . . 5 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → ¬ 𝑌 = 0)
135		simp2 1134	. . . . . . . 8 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → 𝑌 ∈ ℤ)
136		elz 12588	. . . . . . . 8 ⊢ (𝑌 ∈ ℤ ↔ (𝑌 ∈ ℝ ∧ (𝑌 = 0 ∨ 𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)))
137	135, 136	sylib 217	. . . . . . 7 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → (𝑌 ∈ ℝ ∧ (𝑌 = 0 ∨ 𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)))
138	137	simprd 494	. . . . . 6 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → (𝑌 = 0 ∨ 𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ))
139		3orass 1087	. . . . . 6 ⊢ ((𝑌 = 0 ∨ 𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ) ↔ (𝑌 = 0 ∨ (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)))
140	138, 139	sylib 217	. . . . 5 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → (𝑌 = 0 ∨ (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)))
141		orel1 886	. . . . 5 ⊢ (¬ 𝑌 = 0 → ((𝑌 = 0 ∨ (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)) → (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ)))
142	134, 140, 141	sylc 65	. . . 4 ⊢ ((𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0) → (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ))
143	142	adantl 480	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝑌 ∈ ℕ ∨ -𝑌 ∈ ℕ))
144	90, 132, 143	mpjaodan 956	. 2 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(𝑋 / (𝑋 gcd 𝑌))) / (𝐿‘(𝑌 / (𝑋 gcd 𝑌)))) = ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))))
145	6	zcnd 12695	. . . . 5 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → 𝑋 ∈ ℂ)
146	145, 34, 16	divcan1d 12019	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝑋 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌)) = 𝑋)
147	146	fveq2d 6895	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌))) = (𝐿‘𝑋))
148	33, 34, 16	divcan1d 12019	. . . 4 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝑌 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌)) = 𝑌)
149	148	fveq2d 6895	. . 3 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌))) = (𝐿‘𝑌))
150	147, 149	oveq12d 7433	. 2 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘((𝑋 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌))) / (𝐿‘((𝑌 / (𝑋 gcd 𝑌)) · (𝑋 gcd 𝑌)))) = ((𝐿‘𝑋) / (𝐿‘𝑌)))
151	81, 144, 150	3eqtr3d 2773	1 ⊢ (((𝑅 ∈ DivRing ∧ (chr‘𝑅) = 0) ∧ (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ ∧ 𝑌 ≠ 0)) → ((𝐿‘(numer‘(𝑋 / 𝑌))) / (𝐿‘(denom‘(𝑋 / 𝑌)))) = ((𝐿‘𝑋) / (𝐿‘𝑌)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 394 ∨ wo 845 ∨ w3o 1083 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2930 {csn 4624 class class class wbr 5143 ^◡ccnv 5671 “ cima 5675 Fn wfn 6537 ⟶wf 6538 ‘cfv 6542 (class class class)co 7415 ℂcc 11134 ℝcr 11135 0cc0 11136 1c1 11137 · cmul 11141 -cneg 11473 / cdiv 11899 ℕcn 12240 ℤcz 12586 abscabs 15211 ∥ cdvds 16228 gcd cgcd 16466 numercnumer 16702 denomcdenom 16703 Basecbs 17177 0_gc0g 17418 Ringcrg 20175 Unitcui 20296 /_rcdvr 20341 RingHom crh 20410 DivRingcdr 20626 ℤ_ringczring 21374 ℤRHomczrh 21427 chrcchr 21429

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 5280 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7737 ax-cnex 11192 ax-resscn 11193 ax-1cn 11194 ax-icn 11195 ax-addcl 11196 ax-addrcl 11197 ax-mulcl 11198 ax-mulrcl 11199 ax-mulcom 11200 ax-addass 11201 ax-mulass 11202 ax-distr 11203 ax-i2m1 11204 ax-1ne0 11205 ax-1rid 11206 ax-rnegex 11207 ax-rrecex 11208 ax-cnre 11209 ax-pre-lttri 11210 ax-pre-lttrn 11211 ax-pre-ltadd 11212 ax-pre-mulgt0 11213 ax-pre-sup 11214 ax-addf 11215 ax-mulf 11216

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 3770 df-csb 3886 df-dif 3943 df-un 3945 df-in 3947 df-ss 3957 df-pss 3960 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-iun 4993 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 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 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 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-riota 7371 df-ov 7418 df-oprab 7419 df-mpo 7420 df-om 7868 df-1st 7989 df-2nd 7990 df-tpos 8228 df-frecs 8283 df-wrecs 8314 df-recs 8388 df-rdg 8427 df-1o 8483 df-er 8721 df-map 8843 df-en 8961 df-dom 8962 df-sdom 8963 df-fin 8964 df-sup 9463 df-inf 9464 df-pnf 11278 df-mnf 11279 df-xr 11280 df-ltxr 11281 df-le 11282 df-sub 11474 df-neg 11475 df-div 11900 df-nn 12241 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 df-9 12310 df-n0 12501 df-z 12587 df-dec 12706 df-uz 12851 df-q 12961 df-rp 13005 df-fz 13515 df-fl 13787 df-mod 13865 df-seq 13997 df-exp 14057 df-cj 15076 df-re 15077 df-im 15078 df-sqrt 15212 df-abs 15213 df-dvds 16229 df-gcd 16467 df-numer 16704 df-denom 16705 df-gz 16896 df-struct 17113 df-sets 17130 df-slot 17148 df-ndx 17160 df-base 17178 df-ress 17207 df-plusg 17243 df-mulr 17244 df-starv 17245 df-tset 17249 df-ple 17250 df-ds 17252 df-unif 17253 df-0g 17420 df-mgm 18597 df-sgrp 18676 df-mnd 18692 df-mhm 18737 df-grp 18895 df-minusg 18896 df-sbg 18897 df-mulg 19026 df-subg 19080 df-ghm 19170 df-od 19485 df-cmn 19739 df-abl 19740 df-mgp 20077 df-rng 20095 df-ur 20124 df-ring 20177 df-cring 20178 df-oppr 20275 df-dvdsr 20298 df-unit 20299 df-invr 20329 df-dvr 20342 df-rhm 20413 df-subrng 20485 df-subrg 20510 df-drng 20628 df-cnfld 21282 df-zring 21375 df-zrh 21431 df-chr 21433

This theorem is referenced by: qqhval2 33639 qqhvq 33644

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