acongeq - Mathbox for Stefan O'Rear

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Theorem acongeq 43007

Description: Two numbers in the fundamental domain are alternating-congruent iff they are equal. TODO: could be used to shorten jm2.26 43026. (Contributed by Stefan O'Rear, 4-Oct-2014.)

**Assertion**
Ref	Expression
acongeq	⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 = 𝐶 ↔ ((2 · 𝐴) ∥ (𝐵 − 𝐶) ∨ (2 · 𝐴) ∥ (𝐵 − -𝐶))))

**Proof of Theorem acongeq**
Step	Hyp	Ref	Expression
1		2z 12624	. . . . . . 7 ⊢ 2 ∈ ℤ
2		nnz 12609	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℤ)
3	2	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℤ)
4		zmulcl 12641	. . . . . . 7 ⊢ ((2 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (2 · 𝐴) ∈ ℤ)
5	1, 3, 4	sylancr 587	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (2 · 𝐴) ∈ ℤ)
6		elfzelz 13541	. . . . . . 7 ⊢ (𝐵 ∈ (0...𝐴) → 𝐵 ∈ ℤ)
7	6	3ad2ant2 1134	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐵 ∈ ℤ)
8		congid 42995	. . . . . 6 ⊢ (((2 · 𝐴) ∈ ℤ ∧ 𝐵 ∈ ℤ) → (2 · 𝐴) ∥ (𝐵 − 𝐵))
9	5, 7, 8	syl2anc 584	. . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (2 · 𝐴) ∥ (𝐵 − 𝐵))
10	9	adantr 480	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ 𝐵 = 𝐶) → (2 · 𝐴) ∥ (𝐵 − 𝐵))
11		oveq2 7413	. . . . 5 ⊢ (𝐵 = 𝐶 → (𝐵 − 𝐵) = (𝐵 − 𝐶))
12	11	adantl 481	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ 𝐵 = 𝐶) → (𝐵 − 𝐵) = (𝐵 − 𝐶))
13	10, 12	breqtrd 5145	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ 𝐵 = 𝐶) → (2 · 𝐴) ∥ (𝐵 − 𝐶))
14	13	orcd 873	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ 𝐵 = 𝐶) → ((2 · 𝐴) ∥ (𝐵 − 𝐶) ∨ (2 · 𝐴) ∥ (𝐵 − -𝐶)))
15		elfzelz 13541	. . . . . . . . . 10 ⊢ (𝐶 ∈ (0...𝐴) → 𝐶 ∈ ℤ)
16	15	3ad2ant3 1135	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐶 ∈ ℤ)
17	7, 16	zsubcld 12702	. . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − 𝐶) ∈ ℤ)
18	17	zcnd 12698	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − 𝐶) ∈ ℂ)
19	18	abscld 15455	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (abs‘(𝐵 − 𝐶)) ∈ ℝ)
20		nnre 12247	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ)
21	20	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℝ)
22		0re 11237	. . . . . . 7 ⊢ 0 ∈ ℝ
23		resubcl 11547	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐴 − 0) ∈ ℝ)
24	21, 22, 23	sylancl 586	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 0) ∈ ℝ)
25		2re 12314	. . . . . . 7 ⊢ 2 ∈ ℝ
26		remulcl 11214	. . . . . . 7 ⊢ ((2 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (2 · 𝐴) ∈ ℝ)
27	25, 21, 26	sylancr 587	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (2 · 𝐴) ∈ ℝ)
28		simp2 1137	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐵 ∈ (0...𝐴))
29		simp3 1138	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐶 ∈ (0...𝐴))
30	24	leidd 11803	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 0) ≤ (𝐴 − 0))
31		fzmaxdif 43005	. . . . . . 7 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ (0...𝐴)) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ (0...𝐴)) ∧ (𝐴 − 0) ≤ (𝐴 − 0)) → (abs‘(𝐵 − 𝐶)) ≤ (𝐴 − 0))
32	3, 28, 3, 29, 30, 31	syl221anc 1383	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (abs‘(𝐵 − 𝐶)) ≤ (𝐴 − 0))
33		nnrp 13020	. . . . . . . . 9 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ⁺)
34	33	3ad2ant1 1133	. . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℝ⁺)
35	21, 34	ltaddrpd 13084	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 < (𝐴 + 𝐴))
36	21	recnd 11263	. . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℂ)
37	36	subid1d 11583	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 0) = 𝐴)
38	36	2timesd 12484	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (2 · 𝐴) = (𝐴 + 𝐴))
39	35, 37, 38	3brtr4d 5151	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 0) < (2 · 𝐴))
40	19, 24, 27, 32, 39	lelttrd 11393	. . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (abs‘(𝐵 − 𝐶)) < (2 · 𝐴))
41	40	adantr 480	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → (abs‘(𝐵 − 𝐶)) < (2 · 𝐴))
42		2nn 12313	. . . . . 6 ⊢ 2 ∈ ℕ
43		simpl1 1192	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐴 ∈ ℕ)
44		nnmulcl 12264	. . . . . 6 ⊢ ((2 ∈ ℕ ∧ 𝐴 ∈ ℕ) → (2 · 𝐴) ∈ ℕ)
45	42, 43, 44	sylancr 587	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → (2 · 𝐴) ∈ ℕ)
46		simpl2 1193	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐵 ∈ (0...𝐴))
47	46	elfzelzd 13542	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐵 ∈ ℤ)
48		simpl3 1194	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐶 ∈ (0...𝐴))
49	48	elfzelzd 13542	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐶 ∈ ℤ)
50		simpr 484	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → (2 · 𝐴) ∥ (𝐵 − 𝐶))
51		congabseq 42998	. . . . 5 ⊢ ((((2 · 𝐴) ∈ ℕ ∧ 𝐵 ∈ ℤ ∧ 𝐶 ∈ ℤ) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → ((abs‘(𝐵 − 𝐶)) < (2 · 𝐴) ↔ 𝐵 = 𝐶))
52	45, 47, 49, 50, 51	syl31anc 1375	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → ((abs‘(𝐵 − 𝐶)) < (2 · 𝐴) ↔ 𝐵 = 𝐶))
53	41, 52	mpbid 232	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐶)) → 𝐵 = 𝐶)
54		simpll2 1214	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐵 ∈ (0...𝐴))
55		elfzle1 13544	. . . . . . . . . . 11 ⊢ (𝐵 ∈ (0...𝐴) → 0 ≤ 𝐵)
56	54, 55	syl 17	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 0 ≤ 𝐵)
57	7	zred 12697	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐵 ∈ ℝ)
58	16	zred 12697	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐶 ∈ ℝ)
59	58	renegcld 11664	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → -𝐶 ∈ ℝ)
60	57, 59	resubcld 11665	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − -𝐶) ∈ ℝ)
61	60	recnd 11263	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − -𝐶) ∈ ℂ)
62	61	abscld 15455	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (abs‘(𝐵 − -𝐶)) ∈ ℝ)
63	62	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (abs‘(𝐵 − -𝐶)) ∈ ℝ)
64		1re 11235	. . . . . . . . . . . . . . . 16 ⊢ 1 ∈ ℝ
65		resubcl 11547	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℝ ∧ 1 ∈ ℝ) → (𝐴 − 1) ∈ ℝ)
66	21, 64, 65	sylancl 586	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 1) ∈ ℝ)
67	66	renegcld 11664	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → -(𝐴 − 1) ∈ ℝ)
68	21, 67	resubcld 11665	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − -(𝐴 − 1)) ∈ ℝ)
69	68	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (𝐴 − -(𝐴 − 1)) ∈ ℝ)
70	27	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (2 · 𝐴) ∈ ℝ)
71	7	ad2antrr 726	. . . . . . . . . . . . . . 15 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐵 ∈ ℤ)
72	71	zcnd 12698	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐵 ∈ ℂ)
73	16	znegcld 12699	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → -𝐶 ∈ ℤ)
74	73	ad2antrr 726	. . . . . . . . . . . . . . 15 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 ∈ ℤ)
75	74	zcnd 12698	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 ∈ ℂ)
76	72, 75	abssubd 15472	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (abs‘(𝐵 − -𝐶)) = (abs‘(-𝐶 − 𝐵)))
77		0zd 12600	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 0 ∈ ℤ)
78		simpr 484	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐶 ∈ (0...(𝐴 − 1)))
79		0zd 12600	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 0 ∈ ℤ)
80		1z 12622	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 ∈ ℤ
81		zsubcl 12634	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℤ ∧ 1 ∈ ℤ) → (𝐴 − 1) ∈ ℤ)
82	3, 80, 81	sylancl 586	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 1) ∈ ℤ)
83		fzneg 43006	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐶 ∈ ℤ ∧ 0 ∈ ℤ ∧ (𝐴 − 1) ∈ ℤ) → (𝐶 ∈ (0...(𝐴 − 1)) ↔ -𝐶 ∈ (-(𝐴 − 1)...-0)))
84	16, 79, 82, 83	syl3anc 1373	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐶 ∈ (0...(𝐴 − 1)) ↔ -𝐶 ∈ (-(𝐴 − 1)...-0)))
85	84	ad2antrr 726	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (𝐶 ∈ (0...(𝐴 − 1)) ↔ -𝐶 ∈ (-(𝐴 − 1)...-0)))
86	78, 85	mpbid 232	. . . . . . . . . . . . . . 15 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 ∈ (-(𝐴 − 1)...-0))
87		neg0 11529	. . . . . . . . . . . . . . . . 17 ⊢ -0 = 0
88	87	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -0 = 0)
89	88	oveq2d 7421	. . . . . . . . . . . . . . 15 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (-(𝐴 − 1)...-0) = (-(𝐴 − 1)...0))
90	86, 89	eleqtrd 2836	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 ∈ (-(𝐴 − 1)...0))
91	3	ad2antrr 726	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐴 ∈ ℤ)
92		simp1 1136	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℕ)
93	42, 92, 44	sylancr 587	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (2 · 𝐴) ∈ ℕ)
94		nnm1nn0 12542	. . . . . . . . . . . . . . . . . 18 ⊢ ((2 · 𝐴) ∈ ℕ → ((2 · 𝐴) − 1) ∈ ℕ₀)
95	93, 94	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((2 · 𝐴) − 1) ∈ ℕ₀)
96	95	nn0ge0d 12565	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 0 ≤ ((2 · 𝐴) − 1))
97		0m0e0 12360	. . . . . . . . . . . . . . . . 17 ⊢ (0 − 0) = 0
98	97	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (0 − 0) = 0)
99		1cnd 11230	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 1 ∈ ℂ)
100	36, 36, 99	addsubassd 11614	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((𝐴 + 𝐴) − 1) = (𝐴 + (𝐴 − 1)))
101	38	oveq1d 7420	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((2 · 𝐴) − 1) = ((𝐴 + 𝐴) − 1))
102		ax-1cn 11187	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 ∈ ℂ
103		subcl 11481	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ)
104	36, 102, 103	sylancl 586	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − 1) ∈ ℂ)
105	36, 104	subnegd 11601	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − -(𝐴 − 1)) = (𝐴 + (𝐴 − 1)))
106	100, 101, 105	3eqtr4rd 2781	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − -(𝐴 − 1)) = ((2 · 𝐴) − 1))
107	96, 98, 106	3brtr4d 5151	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (0 − 0) ≤ (𝐴 − -(𝐴 − 1)))
108	107	ad2antrr 726	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (0 − 0) ≤ (𝐴 − -(𝐴 − 1)))
109		fzmaxdif 43005	. . . . . . . . . . . . . 14 ⊢ (((0 ∈ ℤ ∧ -𝐶 ∈ (-(𝐴 − 1)...0)) ∧ (𝐴 ∈ ℤ ∧ 𝐵 ∈ (0...𝐴)) ∧ (0 − 0) ≤ (𝐴 − -(𝐴 − 1))) → (abs‘(-𝐶 − 𝐵)) ≤ (𝐴 − -(𝐴 − 1)))
110	77, 90, 91, 54, 108, 109	syl221anc 1383	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (abs‘(-𝐶 − 𝐵)) ≤ (𝐴 − -(𝐴 − 1)))
111	76, 110	eqbrtrd 5141	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (abs‘(𝐵 − -𝐶)) ≤ (𝐴 − -(𝐴 − 1)))
112	27	ltm1d 12174	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((2 · 𝐴) − 1) < (2 · 𝐴))
113	106, 112	eqbrtrd 5141	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 − -(𝐴 − 1)) < (2 · 𝐴))
114	113	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (𝐴 − -(𝐴 − 1)) < (2 · 𝐴))
115	63, 69, 70, 111, 114	lelttrd 11393	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (abs‘(𝐵 − -𝐶)) < (2 · 𝐴))
116	93	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (2 · 𝐴) ∈ ℕ)
117		simplr 768	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (2 · 𝐴) ∥ (𝐵 − -𝐶))
118		congabseq 42998	. . . . . . . . . . . 12 ⊢ ((((2 · 𝐴) ∈ ℕ ∧ 𝐵 ∈ ℤ ∧ -𝐶 ∈ ℤ) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) → ((abs‘(𝐵 − -𝐶)) < (2 · 𝐴) ↔ 𝐵 = -𝐶))
119	116, 71, 74, 117, 118	syl31anc 1375	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → ((abs‘(𝐵 − -𝐶)) < (2 · 𝐴) ↔ 𝐵 = -𝐶))
120	115, 119	mpbid 232	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐵 = -𝐶)
121	56, 120	breqtrd 5145	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 0 ≤ -𝐶)
122		elfzelz 13541	. . . . . . . . . . . 12 ⊢ (𝐶 ∈ (0...(𝐴 − 1)) → 𝐶 ∈ ℤ)
123	122	zred 12697	. . . . . . . . . . 11 ⊢ (𝐶 ∈ (0...(𝐴 − 1)) → 𝐶 ∈ ℝ)
124	123	adantl 481	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐶 ∈ ℝ)
125	124	le0neg1d 11808	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (𝐶 ≤ 0 ↔ 0 ≤ -𝐶))
126	121, 125	mpbird 257	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐶 ≤ 0)
127		elfzle1 13544	. . . . . . . . 9 ⊢ (𝐶 ∈ (0...(𝐴 − 1)) → 0 ≤ 𝐶)
128	127	adantl 481	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 0 ≤ 𝐶)
129		letri3 11320	. . . . . . . . 9 ⊢ ((𝐶 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐶 = 0 ↔ (𝐶 ≤ 0 ∧ 0 ≤ 𝐶)))
130	124, 22, 129	sylancl 586	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → (𝐶 = 0 ↔ (𝐶 ≤ 0 ∧ 0 ≤ 𝐶)))
131	126, 128, 130	mpbir2and 713	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐶 = 0)
132	131	negeqd 11476	. . . . . 6 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 = -0)
133	132, 88	eqtrd 2770	. . . . 5 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → -𝐶 = 0)
134	133, 120, 131	3eqtr4d 2780	. . . 4 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 ∈ (0...(𝐴 − 1))) → 𝐵 = 𝐶)
135		oveq2 7413	. . . . . . . . 9 ⊢ (𝐶 = 𝐴 → (𝐵 − 𝐶) = (𝐵 − 𝐴))
136	135	adantl 481	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (𝐵 − 𝐶) = (𝐵 − 𝐴))
137	136	fveq2d 6880	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (abs‘(𝐵 − 𝐶)) = (abs‘(𝐵 − 𝐴)))
138	40	ad2antrr 726	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (abs‘(𝐵 − 𝐶)) < (2 · 𝐴))
139	137, 138	eqbrtrrd 5143	. . . . . 6 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (abs‘(𝐵 − 𝐴)) < (2 · 𝐴))
140	93	ad2antrr 726	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (2 · 𝐴) ∈ ℕ)
141	7	ad2antrr 726	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → 𝐵 ∈ ℤ)
142	3	ad2antrr 726	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → 𝐴 ∈ ℤ)
143		simplr 768	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (2 · 𝐴) ∥ (𝐵 − -𝐶))
144	7	zcnd 12698	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐵 ∈ ℂ)
145	36, 36, 144	ppncand 11634	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((𝐴 + 𝐴) + (𝐵 − 𝐴)) = (𝐴 + 𝐵))
146	36, 144	addcomd 11437	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐴 + 𝐵) = (𝐵 + 𝐴))
147	145, 146	eqtrd 2770	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((𝐴 + 𝐴) + (𝐵 − 𝐴)) = (𝐵 + 𝐴))
148	147	ad2antrr 726	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((𝐴 + 𝐴) + (𝐵 − 𝐴)) = (𝐵 + 𝐴))
149		oveq2 7413	. . . . . . . . . . . 12 ⊢ (𝐶 = 𝐴 → (𝐵 + 𝐶) = (𝐵 + 𝐴))
150	149	adantl 481	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (𝐵 + 𝐶) = (𝐵 + 𝐴))
151	148, 150	eqtr4d 2773	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((𝐴 + 𝐴) + (𝐵 − 𝐴)) = (𝐵 + 𝐶))
152	38	oveq1d 7420	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → ((2 · 𝐴) + (𝐵 − 𝐴)) = ((𝐴 + 𝐴) + (𝐵 − 𝐴)))
153	152	ad2antrr 726	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((2 · 𝐴) + (𝐵 − 𝐴)) = ((𝐴 + 𝐴) + (𝐵 − 𝐴)))
154	16	zcnd 12698	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐶 ∈ ℂ)
155	144, 154	subnegd 11601	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − -𝐶) = (𝐵 + 𝐶))
156	155	ad2antrr 726	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (𝐵 − -𝐶) = (𝐵 + 𝐶))
157	151, 153, 156	3eqtr4d 2780	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((2 · 𝐴) + (𝐵 − 𝐴)) = (𝐵 − -𝐶))
158	143, 157	breqtrrd 5147	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (2 · 𝐴) ∥ ((2 · 𝐴) + (𝐵 − 𝐴)))
159	5	ad2antrr 726	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (2 · 𝐴) ∈ ℤ)
160	7, 3	zsubcld 12702	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 − 𝐴) ∈ ℤ)
161	160	ad2antrr 726	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (𝐵 − 𝐴) ∈ ℤ)
162		dvdsadd 16321	. . . . . . . . 9 ⊢ (((2 · 𝐴) ∈ ℤ ∧ (𝐵 − 𝐴) ∈ ℤ) → ((2 · 𝐴) ∥ (𝐵 − 𝐴) ↔ (2 · 𝐴) ∥ ((2 · 𝐴) + (𝐵 − 𝐴))))
163	159, 161, 162	syl2anc 584	. . . . . . . 8 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((2 · 𝐴) ∥ (𝐵 − 𝐴) ↔ (2 · 𝐴) ∥ ((2 · 𝐴) + (𝐵 − 𝐴))))
164	158, 163	mpbird 257	. . . . . . 7 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → (2 · 𝐴) ∥ (𝐵 − 𝐴))
165		congabseq 42998	. . . . . . 7 ⊢ ((((2 · 𝐴) ∈ ℕ ∧ 𝐵 ∈ ℤ ∧ 𝐴 ∈ ℤ) ∧ (2 · 𝐴) ∥ (𝐵 − 𝐴)) → ((abs‘(𝐵 − 𝐴)) < (2 · 𝐴) ↔ 𝐵 = 𝐴))
166	140, 141, 142, 164, 165	syl31anc 1375	. . . . . 6 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → ((abs‘(𝐵 − 𝐴)) < (2 · 𝐴) ↔ 𝐵 = 𝐴))
167	139, 166	mpbid 232	. . . . 5 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → 𝐵 = 𝐴)
168		simpr 484	. . . . 5 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → 𝐶 = 𝐴)
169	167, 168	eqtr4d 2773	. . . 4 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) ∧ 𝐶 = 𝐴) → 𝐵 = 𝐶)
170		nnnn0 12508	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℕ₀)
171	170	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ ℕ₀)
172		nn0uz 12894	. . . . . . 7 ⊢ ℕ₀ = (ℤ_≥‘0)
173	171, 172	eleqtrdi 2844	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → 𝐴 ∈ (ℤ_≥‘0))
174		fzm1 13624	. . . . . . 7 ⊢ (𝐴 ∈ (ℤ_≥‘0) → (𝐶 ∈ (0...𝐴) ↔ (𝐶 ∈ (0...(𝐴 − 1)) ∨ 𝐶 = 𝐴)))
175	174	biimpa 476	. . . . . 6 ⊢ ((𝐴 ∈ (ℤ_≥‘0) ∧ 𝐶 ∈ (0...𝐴)) → (𝐶 ∈ (0...(𝐴 − 1)) ∨ 𝐶 = 𝐴))
176	173, 29, 175	syl2anc 584	. . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐶 ∈ (0...(𝐴 − 1)) ∨ 𝐶 = 𝐴))
177	176	adantr 480	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) → (𝐶 ∈ (0...(𝐴 − 1)) ∨ 𝐶 = 𝐴))
178	134, 169, 177	mpjaodan 960	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ (2 · 𝐴) ∥ (𝐵 − -𝐶)) → 𝐵 = 𝐶)
179	53, 178	jaodan 959	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) ∧ ((2 · 𝐴) ∥ (𝐵 − 𝐶) ∨ (2 · 𝐴) ∥ (𝐵 − -𝐶))) → 𝐵 = 𝐶)
180	14, 179	impbida 800	1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ (0...𝐴) ∧ 𝐶 ∈ (0...𝐴)) → (𝐵 = 𝐶 ↔ ((2 · 𝐴) ∥ (𝐵 − 𝐶) ∨ (2 · 𝐴) ∥ (𝐵 − -𝐶))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 847 ∧ w3a 1086 = wceq 1540 ∈ wcel 2108 class class class wbr 5119 ‘cfv 6531 (class class class)co 7405 ℂcc 11127 ℝcr 11128 0cc0 11129 1c1 11130 + caddc 11132 · cmul 11134 < clt 11269 ≤ cle 11270 − cmin 11466 -cneg 11467 ℕcn 12240 2c2 12295 ℕ₀cn0 12501 ℤcz 12588 ℤ_≥cuz 12852 ℝ⁺crp 13008 ...cfz 13524 abscabs 15253 ∥ cdvds 16272

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-cnex 11185 ax-resscn 11186 ax-1cn 11187 ax-icn 11188 ax-addcl 11189 ax-addrcl 11190 ax-mulcl 11191 ax-mulrcl 11192 ax-mulcom 11193 ax-addass 11194 ax-mulass 11195 ax-distr 11196 ax-i2m1 11197 ax-1ne0 11198 ax-1rid 11199 ax-rnegex 11200 ax-rrecex 11201 ax-cnre 11202 ax-pre-lttri 11203 ax-pre-lttrn 11204 ax-pre-ltadd 11205 ax-pre-mulgt0 11206 ax-pre-sup 11207

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7862 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8719 df-en 8960 df-dom 8961 df-sdom 8962 df-sup 9454 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-sub 11468 df-neg 11469 df-div 11895 df-nn 12241 df-2 12303 df-3 12304 df-n0 12502 df-z 12589 df-uz 12853 df-rp 13009 df-fz 13525 df-seq 14020 df-exp 14080 df-cj 15118 df-re 15119 df-im 15120 df-sqrt 15254 df-abs 15255 df-dvds 16273

This theorem is referenced by: jm2.27a 43029

W3C validator