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Theorem odd2np1lem 15346

Description: Lemma for odd2np1 15347. (Contributed by Scott Fenton, 3-Apr-2014.) (Revised by Mario Carneiro, 19-Apr-2014.)

**Assertion**
Ref	Expression
odd2np1lem	⊢ (𝑁 ∈ ℕ₀ → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑁 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑁))

Distinct variable groups: 𝑘,𝑁 𝑛,𝑁

Proof of Theorem odd2np1lem Dummy variables 𝑗 𝑚 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqeq2 2776	. . . 4 ⊢ (𝑗 = 0 → (((2 · 𝑛) + 1) = 𝑗 ↔ ((2 · 𝑛) + 1) = 0))
2	1	rexbidv 3199	. . 3 ⊢ (𝑗 = 0 → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ↔ ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 0))
3		eqeq2 2776	. . . 4 ⊢ (𝑗 = 0 → ((𝑘 · 2) = 𝑗 ↔ (𝑘 · 2) = 0))
4	3	rexbidv 3199	. . 3 ⊢ (𝑗 = 0 → (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗 ↔ ∃𝑘 ∈ ℤ (𝑘 · 2) = 0))
5	2, 4	orbi12d 942	. 2 ⊢ (𝑗 = 0 → ((∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗) ↔ (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 0 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 0)))
6		eqeq2 2776	. . . . 5 ⊢ (𝑗 = 𝑚 → (((2 · 𝑛) + 1) = 𝑗 ↔ ((2 · 𝑛) + 1) = 𝑚))
7	6	rexbidv 3199	. . . 4 ⊢ (𝑗 = 𝑚 → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ↔ ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑚))
8		oveq2 6850	. . . . . . 7 ⊢ (𝑛 = 𝑥 → (2 · 𝑛) = (2 · 𝑥))
9	8	oveq1d 6857	. . . . . 6 ⊢ (𝑛 = 𝑥 → ((2 · 𝑛) + 1) = ((2 · 𝑥) + 1))
10	9	eqeq1d 2767	. . . . 5 ⊢ (𝑛 = 𝑥 → (((2 · 𝑛) + 1) = 𝑚 ↔ ((2 · 𝑥) + 1) = 𝑚))
11	10	cbvrexv 3320	. . . 4 ⊢ (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑚 ↔ ∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚)
12	7, 11	syl6bb 278	. . 3 ⊢ (𝑗 = 𝑚 → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ↔ ∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚))
13		eqeq2 2776	. . . . 5 ⊢ (𝑗 = 𝑚 → ((𝑘 · 2) = 𝑗 ↔ (𝑘 · 2) = 𝑚))
14	13	rexbidv 3199	. . . 4 ⊢ (𝑗 = 𝑚 → (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗 ↔ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑚))
15		oveq1 6849	. . . . . 6 ⊢ (𝑘 = 𝑦 → (𝑘 · 2) = (𝑦 · 2))
16	15	eqeq1d 2767	. . . . 5 ⊢ (𝑘 = 𝑦 → ((𝑘 · 2) = 𝑚 ↔ (𝑦 · 2) = 𝑚))
17	16	cbvrexv 3320	. . . 4 ⊢ (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑚 ↔ ∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚)
18	14, 17	syl6bb 278	. . 3 ⊢ (𝑗 = 𝑚 → (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗 ↔ ∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚))
19	12, 18	orbi12d 942	. 2 ⊢ (𝑗 = 𝑚 → ((∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗) ↔ (∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚 ∨ ∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚)))
20		eqeq2 2776	. . . 4 ⊢ (𝑗 = (𝑚 + 1) → (((2 · 𝑛) + 1) = 𝑗 ↔ ((2 · 𝑛) + 1) = (𝑚 + 1)))
21	20	rexbidv 3199	. . 3 ⊢ (𝑗 = (𝑚 + 1) → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ↔ ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
22		eqeq2 2776	. . . 4 ⊢ (𝑗 = (𝑚 + 1) → ((𝑘 · 2) = 𝑗 ↔ (𝑘 · 2) = (𝑚 + 1)))
23	22	rexbidv 3199	. . 3 ⊢ (𝑗 = (𝑚 + 1) → (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗 ↔ ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1)))
24	21, 23	orbi12d 942	. 2 ⊢ (𝑗 = (𝑚 + 1) → ((∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗) ↔ (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1) ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1))))
25		eqeq2 2776	. . . 4 ⊢ (𝑗 = 𝑁 → (((2 · 𝑛) + 1) = 𝑗 ↔ ((2 · 𝑛) + 1) = 𝑁))
26	25	rexbidv 3199	. . 3 ⊢ (𝑗 = 𝑁 → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ↔ ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑁))
27		eqeq2 2776	. . . 4 ⊢ (𝑗 = 𝑁 → ((𝑘 · 2) = 𝑗 ↔ (𝑘 · 2) = 𝑁))
28	27	rexbidv 3199	. . 3 ⊢ (𝑗 = 𝑁 → (∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗 ↔ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑁))
29	26, 28	orbi12d 942	. 2 ⊢ (𝑗 = 𝑁 → ((∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑗 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑗) ↔ (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑁 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑁)))
30		0z 11635	. . . 4 ⊢ 0 ∈ ℤ
31		2cn 11347	. . . . 5 ⊢ 2 ∈ ℂ
32	31	mul02i 10479	. . . 4 ⊢ (0 · 2) = 0
33		oveq1 6849	. . . . . 6 ⊢ (𝑘 = 0 → (𝑘 · 2) = (0 · 2))
34	33	eqeq1d 2767	. . . . 5 ⊢ (𝑘 = 0 → ((𝑘 · 2) = 0 ↔ (0 · 2) = 0))
35	34	rspcev 3461	. . . 4 ⊢ ((0 ∈ ℤ ∧ (0 · 2) = 0) → ∃𝑘 ∈ ℤ (𝑘 · 2) = 0)
36	30, 32, 35	mp2an 683	. . 3 ⊢ ∃𝑘 ∈ ℤ (𝑘 · 2) = 0
37	36	olci 892	. 2 ⊢ (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 0 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 0)
38		orcom 896	. . 3 ⊢ ((∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚 ∨ ∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚) ↔ (∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚 ∨ ∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚))
39		zcn 11629	. . . . . . . . 9 ⊢ (𝑦 ∈ ℤ → 𝑦 ∈ ℂ)
40		mulcom 10275	. . . . . . . . 9 ⊢ ((𝑦 ∈ ℂ ∧ 2 ∈ ℂ) → (𝑦 · 2) = (2 · 𝑦))
41	39, 31, 40	sylancl 580	. . . . . . . 8 ⊢ (𝑦 ∈ ℤ → (𝑦 · 2) = (2 · 𝑦))
42	41	adantl 473	. . . . . . 7 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑦 ∈ ℤ) → (𝑦 · 2) = (2 · 𝑦))
43	42	eqeq1d 2767	. . . . . 6 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑦 ∈ ℤ) → ((𝑦 · 2) = 𝑚 ↔ (2 · 𝑦) = 𝑚))
44		eqid 2765	. . . . . . . . 9 ⊢ ((2 · 𝑦) + 1) = ((2 · 𝑦) + 1)
45		oveq2 6850	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑦 → (2 · 𝑛) = (2 · 𝑦))
46	45	oveq1d 6857	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑦 → ((2 · 𝑛) + 1) = ((2 · 𝑦) + 1))
47	46	eqeq1d 2767	. . . . . . . . . 10 ⊢ (𝑛 = 𝑦 → (((2 · 𝑛) + 1) = ((2 · 𝑦) + 1) ↔ ((2 · 𝑦) + 1) = ((2 · 𝑦) + 1)))
48	47	rspcev 3461	. . . . . . . . 9 ⊢ ((𝑦 ∈ ℤ ∧ ((2 · 𝑦) + 1) = ((2 · 𝑦) + 1)) → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = ((2 · 𝑦) + 1))
49	44, 48	mpan2 682	. . . . . . . 8 ⊢ (𝑦 ∈ ℤ → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = ((2 · 𝑦) + 1))
50		oveq1 6849	. . . . . . . . . 10 ⊢ ((2 · 𝑦) = 𝑚 → ((2 · 𝑦) + 1) = (𝑚 + 1))
51	50	eqeq2d 2775	. . . . . . . . 9 ⊢ ((2 · 𝑦) = 𝑚 → (((2 · 𝑛) + 1) = ((2 · 𝑦) + 1) ↔ ((2 · 𝑛) + 1) = (𝑚 + 1)))
52	51	rexbidv 3199	. . . . . . . 8 ⊢ ((2 · 𝑦) = 𝑚 → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = ((2 · 𝑦) + 1) ↔ ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
53	49, 52	syl5ibcom 236	. . . . . . 7 ⊢ (𝑦 ∈ ℤ → ((2 · 𝑦) = 𝑚 → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
54	53	adantl 473	. . . . . 6 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑦 ∈ ℤ) → ((2 · 𝑦) = 𝑚 → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
55	43, 54	sylbid 231	. . . . 5 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑦 ∈ ℤ) → ((𝑦 · 2) = 𝑚 → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
56	55	rexlimdva 3178	. . . 4 ⊢ (𝑚 ∈ ℕ₀ → (∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚 → ∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1)))
57		peano2z 11665	. . . . . . . 8 ⊢ (𝑥 ∈ ℤ → (𝑥 + 1) ∈ ℤ)
58	57	adantl 473	. . . . . . 7 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑥 ∈ ℤ) → (𝑥 + 1) ∈ ℤ)
59		zcn 11629	. . . . . . . . 9 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ)
60		mulcom 10275	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ ℂ ∧ 2 ∈ ℂ) → (𝑥 · 2) = (2 · 𝑥))
61	31, 60	mpan2 682	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ ℂ → (𝑥 · 2) = (2 · 𝑥))
62	31	mulid2i 10299	. . . . . . . . . . . . 13 ⊢ (1 · 2) = 2
63	62	a1i 11	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ ℂ → (1 · 2) = 2)
64	61, 63	oveq12d 6860	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℂ → ((𝑥 · 2) + (1 · 2)) = ((2 · 𝑥) + 2))
65		df-2 11335	. . . . . . . . . . . 12 ⊢ 2 = (1 + 1)
66	65	oveq2i 6853	. . . . . . . . . . 11 ⊢ ((2 · 𝑥) + 2) = ((2 · 𝑥) + (1 + 1))
67	64, 66	syl6eq 2815	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → ((𝑥 · 2) + (1 · 2)) = ((2 · 𝑥) + (1 + 1)))
68		ax-1cn 10247	. . . . . . . . . . 11 ⊢ 1 ∈ ℂ
69		adddir 10284	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℂ ∧ 1 ∈ ℂ ∧ 2 ∈ ℂ) → ((𝑥 + 1) · 2) = ((𝑥 · 2) + (1 · 2)))
70	68, 31, 69	mp3an23 1577	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → ((𝑥 + 1) · 2) = ((𝑥 · 2) + (1 · 2)))
71		mulcl 10273	. . . . . . . . . . . 12 ⊢ ((2 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (2 · 𝑥) ∈ ℂ)
72	31, 71	mpan 681	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ℂ → (2 · 𝑥) ∈ ℂ)
73		addass 10276	. . . . . . . . . . . 12 ⊢ (((2 · 𝑥) ∈ ℂ ∧ 1 ∈ ℂ ∧ 1 ∈ ℂ) → (((2 · 𝑥) + 1) + 1) = ((2 · 𝑥) + (1 + 1)))
74	68, 68, 73	mp3an23 1577	. . . . . . . . . . 11 ⊢ ((2 · 𝑥) ∈ ℂ → (((2 · 𝑥) + 1) + 1) = ((2 · 𝑥) + (1 + 1)))
75	72, 74	syl 17	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → (((2 · 𝑥) + 1) + 1) = ((2 · 𝑥) + (1 + 1)))
76	67, 70, 75	3eqtr4d 2809	. . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → ((𝑥 + 1) · 2) = (((2 · 𝑥) + 1) + 1))
77	59, 76	syl 17	. . . . . . . 8 ⊢ (𝑥 ∈ ℤ → ((𝑥 + 1) · 2) = (((2 · 𝑥) + 1) + 1))
78	77	adantl 473	. . . . . . 7 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑥 ∈ ℤ) → ((𝑥 + 1) · 2) = (((2 · 𝑥) + 1) + 1))
79		oveq1 6849	. . . . . . . . 9 ⊢ (𝑘 = (𝑥 + 1) → (𝑘 · 2) = ((𝑥 + 1) · 2))
80	79	eqeq1d 2767	. . . . . . . 8 ⊢ (𝑘 = (𝑥 + 1) → ((𝑘 · 2) = (((2 · 𝑥) + 1) + 1) ↔ ((𝑥 + 1) · 2) = (((2 · 𝑥) + 1) + 1)))
81	80	rspcev 3461	. . . . . . 7 ⊢ (((𝑥 + 1) ∈ ℤ ∧ ((𝑥 + 1) · 2) = (((2 · 𝑥) + 1) + 1)) → ∃𝑘 ∈ ℤ (𝑘 · 2) = (((2 · 𝑥) + 1) + 1))
82	58, 78, 81	syl2anc 579	. . . . . 6 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑥 ∈ ℤ) → ∃𝑘 ∈ ℤ (𝑘 · 2) = (((2 · 𝑥) + 1) + 1))
83		oveq1 6849	. . . . . . . 8 ⊢ (((2 · 𝑥) + 1) = 𝑚 → (((2 · 𝑥) + 1) + 1) = (𝑚 + 1))
84	83	eqeq2d 2775	. . . . . . 7 ⊢ (((2 · 𝑥) + 1) = 𝑚 → ((𝑘 · 2) = (((2 · 𝑥) + 1) + 1) ↔ (𝑘 · 2) = (𝑚 + 1)))
85	84	rexbidv 3199	. . . . . 6 ⊢ (((2 · 𝑥) + 1) = 𝑚 → (∃𝑘 ∈ ℤ (𝑘 · 2) = (((2 · 𝑥) + 1) + 1) ↔ ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1)))
86	82, 85	syl5ibcom 236	. . . . 5 ⊢ ((𝑚 ∈ ℕ₀ ∧ 𝑥 ∈ ℤ) → (((2 · 𝑥) + 1) = 𝑚 → ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1)))
87	86	rexlimdva 3178	. . . 4 ⊢ (𝑚 ∈ ℕ₀ → (∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚 → ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1)))
88	56, 87	orim12d 987	. . 3 ⊢ (𝑚 ∈ ℕ₀ → ((∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚 ∨ ∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚) → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1) ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1))))
89	38, 88	syl5bi 233	. 2 ⊢ (𝑚 ∈ ℕ₀ → ((∃𝑥 ∈ ℤ ((2 · 𝑥) + 1) = 𝑚 ∨ ∃𝑦 ∈ ℤ (𝑦 · 2) = 𝑚) → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = (𝑚 + 1) ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = (𝑚 + 1))))
90	5, 19, 24, 29, 37, 89	nn0ind 11719	1 ⊢ (𝑁 ∈ ℕ₀ → (∃𝑛 ∈ ℤ ((2 · 𝑛) + 1) = 𝑁 ∨ ∃𝑘 ∈ ℤ (𝑘 · 2) = 𝑁))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 384 ∨ wo 873 = wceq 1652 ∈ wcel 2155 ∃wrex 3056 (class class class)co 6842 ℂcc 10187 0cc0 10189 1c1 10190 + caddc 10192 · cmul 10194 2c2 11327 ℕ₀cn0 11538 ℤcz 11624

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1890 ax-4 1904 ax-5 2005 ax-6 2070 ax-7 2105 ax-8 2157 ax-9 2164 ax-10 2183 ax-11 2198 ax-12 2211 ax-13 2352 ax-ext 2743 ax-sep 4941 ax-nul 4949 ax-pow 5001 ax-pr 5062 ax-un 7147 ax-resscn 10246 ax-1cn 10247 ax-icn 10248 ax-addcl 10249 ax-addrcl 10250 ax-mulcl 10251 ax-mulrcl 10252 ax-mulcom 10253 ax-addass 10254 ax-mulass 10255 ax-distr 10256 ax-i2m1 10257 ax-1ne0 10258 ax-1rid 10259 ax-rnegex 10260 ax-rrecex 10261 ax-cnre 10262 ax-pre-lttri 10263 ax-pre-lttrn 10264 ax-pre-ltadd 10265 ax-pre-mulgt0 10266

This theorem depends on definitions: df-bi 198 df-an 385 df-or 874 df-3or 1108 df-3an 1109 df-tru 1656 df-ex 1875 df-nf 1879 df-sb 2063 df-mo 2565 df-eu 2582 df-clab 2752 df-cleq 2758 df-clel 2761 df-nfc 2896 df-ne 2938 df-nel 3041 df-ral 3060 df-rex 3061 df-reu 3062 df-rab 3064 df-v 3352 df-sbc 3597 df-csb 3692 df-dif 3735 df-un 3737 df-in 3739 df-ss 3746 df-pss 3748 df-nul 4080 df-if 4244 df-pw 4317 df-sn 4335 df-pr 4337 df-tp 4339 df-op 4341 df-uni 4595 df-iun 4678 df-br 4810 df-opab 4872 df-mpt 4889 df-tr 4912 df-id 5185 df-eprel 5190 df-po 5198 df-so 5199 df-fr 5236 df-we 5238 df-xp 5283 df-rel 5284 df-cnv 5285 df-co 5286 df-dm 5287 df-rn 5288 df-res 5289 df-ima 5290 df-pred 5865 df-ord 5911 df-on 5912 df-lim 5913 df-suc 5914 df-iota 6031 df-fun 6070 df-fn 6071 df-f 6072 df-f1 6073 df-fo 6074 df-f1o 6075 df-fv 6076 df-riota 6803 df-ov 6845 df-oprab 6846 df-mpt2 6847 df-om 7264 df-wrecs 7610 df-recs 7672 df-rdg 7710 df-er 7947 df-en 8161 df-dom 8162 df-sdom 8163 df-pnf 10330 df-mnf 10331 df-xr 10332 df-ltxr 10333 df-le 10334 df-sub 10522 df-neg 10523 df-nn 11275 df-2 11335 df-n0 11539 df-z 11625

This theorem is referenced by: odd2np1 15347

W3C validator