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Theorem dvdssq 12620

Description: Two numbers are divisible iff their squares are. (Contributed by Scott Fenton, 18-Apr-2014.) (Revised by Mario Carneiro, 19-Apr-2014.)

**Assertion**
Ref	Expression
dvdssq	⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2)))

**Proof of Theorem dvdssq**
Step	Hyp	Ref	Expression
1		0z 9490	. . . 4 ⊢ 0 ∈ ℤ
2		zdceq 9555	. . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 0 ∈ ℤ) → DECID 𝑀 = 0)
3	1, 2	mpan2 425	. . 3 ⊢ (𝑀 ∈ ℤ → DECID 𝑀 = 0)
4		exmiddc 843	. . 3 ⊢ (DECID 𝑀 = 0 → (𝑀 = 0 ∨ ¬ 𝑀 = 0))
5		0dvds 12390	. . . . . . . 8 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ 𝑁 = 0))
6		zcn 9484	. . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
7		sqeq0 10865	. . . . . . . . 9 ⊢ (𝑁 ∈ ℂ → ((𝑁↑2) = 0 ↔ 𝑁 = 0))
8	6, 7	syl 14	. . . . . . . 8 ⊢ (𝑁 ∈ ℤ → ((𝑁↑2) = 0 ↔ 𝑁 = 0))
9	5, 8	bitr4d 191	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ (𝑁↑2) = 0))
10		zsqcl 10873	. . . . . . . 8 ⊢ (𝑁 ∈ ℤ → (𝑁↑2) ∈ ℤ)
11		0dvds 12390	. . . . . . . 8 ⊢ ((𝑁↑2) ∈ ℤ → (0 ∥ (𝑁↑2) ↔ (𝑁↑2) = 0))
12	10, 11	syl 14	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (0 ∥ (𝑁↑2) ↔ (𝑁↑2) = 0))
13	9, 12	bitr4d 191	. . . . . 6 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ 0 ∥ (𝑁↑2)))
14	13	adantl 277	. . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (0 ∥ 𝑁 ↔ 0 ∥ (𝑁↑2)))
15		breq1 4091	. . . . . 6 ⊢ (𝑀 = 0 → (𝑀 ∥ 𝑁 ↔ 0 ∥ 𝑁))
16		sq0i 10894	. . . . . . 7 ⊢ (𝑀 = 0 → (𝑀↑2) = 0)
17	16	breq1d 4098	. . . . . 6 ⊢ (𝑀 = 0 → ((𝑀↑2) ∥ (𝑁↑2) ↔ 0 ∥ (𝑁↑2)))
18	15, 17	bibi12d 235	. . . . 5 ⊢ (𝑀 = 0 → ((𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2)) ↔ (0 ∥ 𝑁 ↔ 0 ∥ (𝑁↑2))))
19	14, 18	imbitrrid 156	. . . 4 ⊢ (𝑀 = 0 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2))))
20		df-ne 2403	. . . . 5 ⊢ (𝑀 ≠ 0 ↔ ¬ 𝑀 = 0)
21		nnabscl 11678	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) → (abs‘𝑀) ∈ ℕ)
22		zdceq 9555	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℤ ∧ 0 ∈ ℤ) → DECID 𝑁 = 0)
23	1, 22	mpan2 425	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → DECID 𝑁 = 0)
24		exmiddc 843	. . . . . . . . . . 11 ⊢ (DECID 𝑁 = 0 → (𝑁 = 0 ∨ ¬ 𝑁 = 0))
25		nnz 9498	. . . . . . . . . . . . . . 15 ⊢ ((abs‘𝑀) ∈ ℕ → (abs‘𝑀) ∈ ℤ)
26		dvds0 12385	. . . . . . . . . . . . . . . 16 ⊢ ((abs‘𝑀) ∈ ℤ → (abs‘𝑀) ∥ 0)
27		zsqcl 10873	. . . . . . . . . . . . . . . . 17 ⊢ ((abs‘𝑀) ∈ ℤ → ((abs‘𝑀)↑2) ∈ ℤ)
28		dvds0 12385	. . . . . . . . . . . . . . . . 17 ⊢ (((abs‘𝑀)↑2) ∈ ℤ → ((abs‘𝑀)↑2) ∥ 0)
29	27, 28	syl 14	. . . . . . . . . . . . . . . 16 ⊢ ((abs‘𝑀) ∈ ℤ → ((abs‘𝑀)↑2) ∥ 0)
30	26, 29	2thd 175	. . . . . . . . . . . . . . 15 ⊢ ((abs‘𝑀) ∈ ℤ → ((abs‘𝑀) ∥ 0 ↔ ((abs‘𝑀)↑2) ∥ 0))
31	25, 30	syl 14	. . . . . . . . . . . . . 14 ⊢ ((abs‘𝑀) ∈ ℕ → ((abs‘𝑀) ∥ 0 ↔ ((abs‘𝑀)↑2) ∥ 0))
32	31	adantr 276	. . . . . . . . . . . . 13 ⊢ (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 0 ↔ ((abs‘𝑀)↑2) ∥ 0))
33		breq2 4092	. . . . . . . . . . . . . 14 ⊢ (𝑁 = 0 → ((abs‘𝑀) ∥ 𝑁 ↔ (abs‘𝑀) ∥ 0))
34		sq0i 10894	. . . . . . . . . . . . . . 15 ⊢ (𝑁 = 0 → (𝑁↑2) = 0)
35	34	breq2d 4100	. . . . . . . . . . . . . 14 ⊢ (𝑁 = 0 → (((abs‘𝑀)↑2) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ 0))
36	33, 35	bibi12d 235	. . . . . . . . . . . . 13 ⊢ (𝑁 = 0 → (((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)) ↔ ((abs‘𝑀) ∥ 0 ↔ ((abs‘𝑀)↑2) ∥ 0)))
37	32, 36	imbitrrid 156	. . . . . . . . . . . 12 ⊢ (𝑁 = 0 → (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2))))
38		df-ne 2403	. . . . . . . . . . . . 13 ⊢ (𝑁 ≠ 0 ↔ ¬ 𝑁 = 0)
39		nnabscl 11678	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (abs‘𝑁) ∈ ℕ)
40		dvdssqlem 12619	. . . . . . . . . . . . . . . . 17 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (abs‘𝑁) ∈ ℕ) → ((abs‘𝑀) ∥ (abs‘𝑁) ↔ ((abs‘𝑀)↑2) ∥ ((abs‘𝑁)↑2)))
41	39, 40	sylan2 286	. . . . . . . . . . . . . . . 16 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → ((abs‘𝑀) ∥ (abs‘𝑁) ↔ ((abs‘𝑀)↑2) ∥ ((abs‘𝑁)↑2)))
42		simpl 109	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝑁 ∈ ℤ)
43		dvdsabsb 12389	. . . . . . . . . . . . . . . . 17 ⊢ (((abs‘𝑀) ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ (abs‘𝑀) ∥ (abs‘𝑁)))
44	25, 42, 43	syl2an 289	. . . . . . . . . . . . . . . 16 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → ((abs‘𝑀) ∥ 𝑁 ↔ (abs‘𝑀) ∥ (abs‘𝑁)))
45		nnsqcl 10872	. . . . . . . . . . . . . . . . . . 19 ⊢ ((abs‘𝑀) ∈ ℕ → ((abs‘𝑀)↑2) ∈ ℕ)
46	45	nnzd 9601	. . . . . . . . . . . . . . . . . 18 ⊢ ((abs‘𝑀) ∈ ℕ → ((abs‘𝑀)↑2) ∈ ℤ)
47	10	adantr 276	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝑁↑2) ∈ ℤ)
48		dvdsabsb 12389	. . . . . . . . . . . . . . . . . 18 ⊢ ((((abs‘𝑀)↑2) ∈ ℤ ∧ (𝑁↑2) ∈ ℤ) → (((abs‘𝑀)↑2) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ (abs‘(𝑁↑2))))
49	46, 47, 48	syl2an 289	. . . . . . . . . . . . . . . . 17 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → (((abs‘𝑀)↑2) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ (abs‘(𝑁↑2))))
50	6	adantr 276	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝑁 ∈ ℂ)
51		abssq 11659	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑁 ∈ ℂ → ((abs‘𝑁)↑2) = (abs‘(𝑁↑2)))
52	50, 51	syl 14	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → ((abs‘𝑁)↑2) = (abs‘(𝑁↑2)))
53	52	breq2d 4100	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (((abs‘𝑀)↑2) ∥ ((abs‘𝑁)↑2) ↔ ((abs‘𝑀)↑2) ∥ (abs‘(𝑁↑2))))
54	53	adantl 277	. . . . . . . . . . . . . . . . 17 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → (((abs‘𝑀)↑2) ∥ ((abs‘𝑁)↑2) ↔ ((abs‘𝑀)↑2) ∥ (abs‘(𝑁↑2))))
55	49, 54	bitr4d 191	. . . . . . . . . . . . . . . 16 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → (((abs‘𝑀)↑2) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ ((abs‘𝑁)↑2)))
56	41, 44, 55	3bitr4d 220	. . . . . . . . . . . . . . 15 ⊢ (((abs‘𝑀) ∈ ℕ ∧ (𝑁 ∈ ℤ ∧ 𝑁 ≠ 0)) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
57	56	anassrs 400	. . . . . . . . . . . . . 14 ⊢ ((((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) ∧ 𝑁 ≠ 0) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
58	57	expcom 116	. . . . . . . . . . . . 13 ⊢ (𝑁 ≠ 0 → (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2))))
59	38, 58	sylbir 135	. . . . . . . . . . . 12 ⊢ (¬ 𝑁 = 0 → (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2))))
60	37, 59	jaoi 723	. . . . . . . . . . 11 ⊢ ((𝑁 = 0 ∨ ¬ 𝑁 = 0) → (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2))))
61	23, 24, 60	3syl 17	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℤ → (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2))))
62	61	anabsi7 583	. . . . . . . . 9 ⊢ (((abs‘𝑀) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
63	21, 62	sylan 283	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → ((abs‘𝑀) ∥ 𝑁 ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
64		absdvdsb 12388	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (abs‘𝑀) ∥ 𝑁))
65	64	adantlr 477	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (abs‘𝑀) ∥ 𝑁))
66		zsqcl 10873	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → (𝑀↑2) ∈ ℤ)
67	66	adantr 276	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) → (𝑀↑2) ∈ ℤ)
68		absdvdsb 12388	. . . . . . . . . 10 ⊢ (((𝑀↑2) ∈ ℤ ∧ (𝑁↑2) ∈ ℤ) → ((𝑀↑2) ∥ (𝑁↑2) ↔ (abs‘(𝑀↑2)) ∥ (𝑁↑2)))
69	67, 10, 68	syl2an 289	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → ((𝑀↑2) ∥ (𝑁↑2) ↔ (abs‘(𝑀↑2)) ∥ (𝑁↑2)))
70		zcn 9484	. . . . . . . . . . . . . 14 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
71		abssq 11659	. . . . . . . . . . . . . 14 ⊢ (𝑀 ∈ ℂ → ((abs‘𝑀)↑2) = (abs‘(𝑀↑2)))
72	70, 71	syl 14	. . . . . . . . . . . . 13 ⊢ (𝑀 ∈ ℤ → ((abs‘𝑀)↑2) = (abs‘(𝑀↑2)))
73	72	eqcomd 2237	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℤ → (abs‘(𝑀↑2)) = ((abs‘𝑀)↑2))
74	73	adantr 276	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) → (abs‘(𝑀↑2)) = ((abs‘𝑀)↑2))
75	74	breq1d 4098	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) → ((abs‘(𝑀↑2)) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
76	75	adantr 276	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → ((abs‘(𝑀↑2)) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
77	69, 76	bitrd 188	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → ((𝑀↑2) ∥ (𝑁↑2) ↔ ((abs‘𝑀)↑2) ∥ (𝑁↑2)))
78	63, 65, 77	3bitr4d 220	. . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0) ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2)))
79	78	an32s 570	. . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑀 ≠ 0) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2)))
80	79	expcom 116	. . . . 5 ⊢ (𝑀 ≠ 0 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2))))
81	20, 80	sylbir 135	. . . 4 ⊢ (¬ 𝑀 = 0 → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2))))
82	19, 81	jaoi 723	. . 3 ⊢ ((𝑀 = 0 ∨ ¬ 𝑀 = 0) → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2))))
83	3, 4, 82	3syl 17	. 2 ⊢ (𝑀 ∈ ℤ → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2))))
84	83	anabsi5 581	1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑀↑2) ∥ (𝑁↑2)))

Colors of variables: wff set class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 715 DECID wdc 841 = wceq 1397 ∈ wcel 2202 ≠ wne 2402 class class class wbr 4088 ‘cfv 5326 (class class class)co 6018 ℂcc 8030 0cc0 8032 ℕcn 9143 2c2 9194 ℤcz 9479 ↑cexp 10801 abscabs 11575 ∥ cdvds 12366

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-mulrcl 8131 ax-addcom 8132 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-i2m1 8137 ax-0lt1 8138 ax-1rid 8139 ax-0id 8140 ax-rnegex 8141 ax-precex 8142 ax-cnre 8143 ax-pre-ltirr 8144 ax-pre-ltwlin 8145 ax-pre-lttrn 8146 ax-pre-apti 8147 ax-pre-ltadd 8148 ax-pre-mulgt0 8149 ax-pre-mulext 8150 ax-arch 8151 ax-caucvg 8152

This theorem depends on definitions: df-bi 117 df-stab 838 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-po 4393 df-iso 4394 df-iord 4463 df-on 4465 df-ilim 4466 df-suc 4468 df-iom 4689 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-1st 6303 df-2nd 6304 df-recs 6471 df-frec 6557 df-sup 7183 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-sub 8352 df-neg 8353 df-reap 8755 df-ap 8762 df-div 8853 df-inn 9144 df-2 9202 df-3 9203 df-4 9204 df-n0 9403 df-z 9480 df-uz 9756 df-q 9854 df-rp 9889 df-fz 10244 df-fzo 10378 df-fl 10531 df-mod 10586 df-seqfrec 10711 df-exp 10802 df-cj 11420 df-re 11421 df-im 11422 df-rsqrt 11576 df-abs 11577 df-dvds 12367 df-gcd 12543

This theorem is referenced by: pythagtriplem19 12873 4sqlem9 12977 4sqlem10 12978 lgsdir 15783 2sqlem8a 15870

W3C validator