Theorem nqpnq0nq 6643

Description: A positive fraction plus a non-negative fraction is a positive fraction. (Contributed by Jim Kingdon, 30-Nov-2019.)

Assertion

Ref	Expression
nqpnq0nq	⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q0) → (𝐴 +Q0 𝐵) ∈ Q)

Proof of Theorem nqpnq0nq

Dummy variables 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nqpi 6568	. . . 4 ⊢ (𝐴 ∈ Q → ∃𝑥∃𝑦((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ))
2		nq0nn 6632	. . . 4 ⊢ (𝐵 ∈ Q0 → ∃𝑧∃𝑤((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 ))
3	1, 2	anim12i 331	. . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q0) → (∃𝑥∃𝑦((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ∃𝑧∃𝑤((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )))
4		ee4anv 1850	. . 3 ⊢ (∃𝑥∃𝑦∃𝑧∃𝑤(((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) ↔ (∃𝑥∃𝑦((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ∃𝑧∃𝑤((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )))
5	3, 4	sylibr 132	. 2 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q0) → ∃𝑥∃𝑦∃𝑧∃𝑤(((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )))
6		oveq12 5541	. . . . . . 7 ⊢ ((𝐴 = [⟨𝑥, 𝑦⟩] ~Q ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 ) → (𝐴 +Q0 𝐵) = ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ))
7	6	ad2ant2l 491	. . . . . 6 ⊢ ((((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → (𝐴 +Q0 𝐵) = ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ))
8		nqnq0pi 6628	. . . . . . . . . 10 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N) → [⟨𝑥, 𝑦⟩] ~Q0 = [⟨𝑥, 𝑦⟩] ~Q )
9	8	oveq1d 5547	. . . . . . . . 9 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N) → ([⟨𝑥, 𝑦⟩] ~Q0 +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ))
10	9	adantr 270	. . . . . . . 8 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ([⟨𝑥, 𝑦⟩] ~Q0 +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ))
11		pinn 6499	. . . . . . . . 9 ⊢ (𝑥 ∈ N → 𝑥 ∈ ω)
12		addnnnq0 6639	. . . . . . . . 9 ⊢ (((𝑥 ∈ ω ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ([⟨𝑥, 𝑦⟩] ~Q0 +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 )
13	11, 12	sylanl1 394	. . . . . . . 8 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ([⟨𝑥, 𝑦⟩] ~Q0 +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 )
14	10, 13	eqtr3d 2115	. . . . . . 7 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 )
15	14	ad2ant2r 492	. . . . . 6 ⊢ ((((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → ([⟨𝑥, 𝑦⟩] ~Q +Q0 [⟨𝑧, 𝑤⟩] ~Q0 ) = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 )
16	7, 15	eqtrd 2113	. . . . 5 ⊢ ((((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → (𝐴 +Q0 𝐵) = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 )
17		pinn 6499	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ N → 𝑦 ∈ ω)
18		nnmcl 6083	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ ω ∧ 𝑧 ∈ ω) → (𝑦 ·𝑜 𝑧) ∈ ω)
19	17, 18	sylan 277	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ N ∧ 𝑧 ∈ ω) → (𝑦 ·𝑜 𝑧) ∈ ω)
20	19	ad2ant2lr 493	. . . . . . . . . . . 12 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → (𝑦 ·𝑜 𝑧) ∈ ω)
21		mulpiord 6507	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ N ∧ 𝑤 ∈ N) → (𝑥 ·N 𝑤) = (𝑥 ·𝑜 𝑤))
22		mulclpi 6518	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ N ∧ 𝑤 ∈ N) → (𝑥 ·N 𝑤) ∈ N)
23	21, 22	eqeltrrd 2156	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ N ∧ 𝑤 ∈ N) → (𝑥 ·𝑜 𝑤) ∈ N)
24	23	ad2ant2rl 494	. . . . . . . . . . . 12 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → (𝑥 ·𝑜 𝑤) ∈ N)
25		pinn 6499	. . . . . . . . . . . . 13 ⊢ ((𝑥 ·𝑜 𝑤) ∈ N → (𝑥 ·𝑜 𝑤) ∈ ω)
26		nnacom 6086	. . . . . . . . . . . . 13 ⊢ (((𝑦 ·𝑜 𝑧) ∈ ω ∧ (𝑥 ·𝑜 𝑤) ∈ ω) → ((𝑦 ·𝑜 𝑧) +𝑜 (𝑥 ·𝑜 𝑤)) = ((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)))
27	25, 26	sylan2 280	. . . . . . . . . . . 12 ⊢ (((𝑦 ·𝑜 𝑧) ∈ ω ∧ (𝑥 ·𝑜 𝑤) ∈ N) → ((𝑦 ·𝑜 𝑧) +𝑜 (𝑥 ·𝑜 𝑤)) = ((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)))
28	20, 24, 27	syl2anc 403	. . . . . . . . . . 11 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ((𝑦 ·𝑜 𝑧) +𝑜 (𝑥 ·𝑜 𝑤)) = ((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)))
29		nnppipi 6533	. . . . . . . . . . . 12 ⊢ (((𝑦 ·𝑜 𝑧) ∈ ω ∧ (𝑥 ·𝑜 𝑤) ∈ N) → ((𝑦 ·𝑜 𝑧) +𝑜 (𝑥 ·𝑜 𝑤)) ∈ N)
30	20, 24, 29	syl2anc 403	. . . . . . . . . . 11 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ((𝑦 ·𝑜 𝑧) +𝑜 (𝑥 ·𝑜 𝑤)) ∈ N)
31	28, 30	eqeltrrd 2156	. . . . . . . . . 10 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)) ∈ N)
32		mulpiord 6507	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ N ∧ 𝑤 ∈ N) → (𝑦 ·N 𝑤) = (𝑦 ·𝑜 𝑤))
33		mulclpi 6518	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ N ∧ 𝑤 ∈ N) → (𝑦 ·N 𝑤) ∈ N)
34	32, 33	eqeltrrd 2156	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ N ∧ 𝑤 ∈ N) → (𝑦 ·𝑜 𝑤) ∈ N)
35	34	ad2ant2l 491	. . . . . . . . . 10 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → (𝑦 ·𝑜 𝑤) ∈ N)
36		opelxpi 4394	. . . . . . . . . 10 ⊢ ((((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)) ∈ N ∧ (𝑦 ·𝑜 𝑤) ∈ N) → ⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩ ∈ (N × N))
37	31, 35, 36	syl2anc 403	. . . . . . . . 9 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩ ∈ (N × N))
38		enqex 6550	. . . . . . . . . 10 ⊢ ~Q ∈ V
39	38	ecelqsi 6183	. . . . . . . . 9 ⊢ (⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩ ∈ (N × N) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q ∈ ((N × N) / ~Q ))
40	37, 39	syl 14	. . . . . . . 8 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q ∈ ((N × N) / ~Q ))
41		df-nqqs 6538	. . . . . . . 8 ⊢ Q = ((N × N) / ~Q )
42	40, 41	syl6eleqr 2172	. . . . . . 7 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q ∈ Q)
43		nqnq0pi 6628	. . . . . . . . 9 ⊢ ((((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)) ∈ N ∧ (𝑦 ·𝑜 𝑤) ∈ N) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 = [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q )
44	43	eleq1d 2147	. . . . . . . 8 ⊢ ((((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)) ∈ N ∧ (𝑦 ·𝑜 𝑤) ∈ N) → ([⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 ∈ Q ↔ [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q ∈ Q))
45	31, 35, 44	syl2anc 403	. . . . . . 7 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → ([⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 ∈ Q ↔ [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q ∈ Q))
46	42, 45	mpbird 165	. . . . . 6 ⊢ (((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 ∈ Q)
47	46	ad2ant2r 492	. . . . 5 ⊢ ((((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → [⟨((𝑥 ·𝑜 𝑤) +𝑜 (𝑦 ·𝑜 𝑧)), (𝑦 ·𝑜 𝑤)⟩] ~Q0 ∈ Q)
48	16, 47	eqeltrd 2155	. . . 4 ⊢ ((((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → (𝐴 +Q0 𝐵) ∈ Q)
49	48	exlimivv 1817	. . 3 ⊢ (∃𝑧∃𝑤(((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → (𝐴 +Q0 𝐵) ∈ Q)
50	49	exlimivv 1817	. 2 ⊢ (∃𝑥∃𝑦∃𝑧∃𝑤(((𝑥 ∈ N ∧ 𝑦 ∈ N) ∧ 𝐴 = [⟨𝑥, 𝑦⟩] ~Q ) ∧ ((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ 𝐵 = [⟨𝑧, 𝑤⟩] ~Q0 )) → (𝐴 +Q0 𝐵) ∈ Q)
51	5, 50	syl 14	1 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q0) → (𝐴 +Q0 𝐵) ∈ Q)

Syntax hints:   → wi 4   ∧ wa 102   ↔ wb 103   = wceq 1284  ∃wex 1421   ∈ wcel 1433  ⟨cop 3401  ωcom 4331   × cxp 4361  (class class class)co 5532   +_𝑜 coa 6021   ·_𝑜 comu 6022  [cec 6127   / cqs 6128  Ncnpi 6462   ·_N cmi 6464   ~_Q ceq 6469  Qcnq 6470   ~_Q0 ceq0 6476  Q₀cnq0 6477   +_Q0 cplq0 6479

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 576  ax-in2 577  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-13 1444  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-coll 3893  ax-sep 3896  ax-nul 3904  ax-pow 3948  ax-pr 3964  ax-un 4188  ax-setind 4280  ax-iinf 4329

This theorem depends on definitions:  df-bi 115  df-dc 776  df-3or 920  df-3an 921  df-tru 1287  df-fal 1290  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ne 2246  df-ral 2353  df-rex 2354  df-reu 2355  df-rab 2357  df-v 2603  df-sbc 2816  df-csb 2909  df-dif 2975  df-un 2977  df-in 2979  df-ss 2986  df-nul 3252  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-int 3637  df-iun 3680  df-br 3786  df-opab 3840  df-mpt 3841  df-tr 3876  df-id 4048  df-iord 4121  df-on 4123  df-suc 4126  df-iom 4332  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-rn 4374  df-res 4375  df-ima 4376  df-iota 4887  df-fun 4924  df-fn 4925  df-f 4926  df-f1 4927  df-fo 4928  df-f1o 4929  df-fv 4930  df-ov 5535  df-oprab 5536  df-mpt2 5537  df-1st 5787  df-2nd 5788  df-recs 5943  df-irdg 5980  df-oadd 6028  df-omul 6029  df-er 6129  df-ec 6131  df-qs 6135  df-ni 6494  df-mi 6496  df-enq 6537  df-nqqs 6538  df-enq0 6614  df-nq0 6615  df-plq0 6617

This theorem is referenced by:  prarloclemcalc  6692