Theorem enq0ref 7432

Description: The equivalence relation for nonnegative fractions is reflexive. Lemma for enq0er 7434. (Contributed by Jim Kingdon, 14-Nov-2019.)

Assertion

Ref	Expression
enq0ref	⊢ (𝑓 ∈ (ω × N) ↔ 𝑓 ~Q0 𝑓)

Proof of Theorem enq0ref

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

Step	Hyp	Ref	Expression
1		elxpi 4643	. . . . . 6 ⊢ (𝑓 ∈ (ω × N) → ∃𝑧∃𝑤(𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)))
2		elxpi 4643	. . . . . 6 ⊢ (𝑓 ∈ (ω × N) → ∃𝑣∃𝑢(𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N)))
3		ee4anv 1934	. . . . . 6 ⊢ (∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) ↔ (∃𝑧∃𝑤(𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ ∃𝑣∃𝑢(𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))))
4	1, 2, 3	sylanbrc 417	. . . . 5 ⊢ (𝑓 ∈ (ω × N) → ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))))
5		eqtr2 2196	. . . . . . . . . . . 12 ⊢ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) → ⟨𝑧, 𝑤⟩ = ⟨𝑣, 𝑢⟩)
6		vex 2741	. . . . . . . . . . . . 13 ⊢ 𝑧 ∈ V
7		vex 2741	. . . . . . . . . . . . 13 ⊢ 𝑤 ∈ V
8	6, 7	opth 4238	. . . . . . . . . . . 12 ⊢ (⟨𝑧, 𝑤⟩ = ⟨𝑣, 𝑢⟩ ↔ (𝑧 = 𝑣 ∧ 𝑤 = 𝑢))
9	5, 8	sylib 122	. . . . . . . . . . 11 ⊢ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) → (𝑧 = 𝑣 ∧ 𝑤 = 𝑢))
10		oveq1 5882	. . . . . . . . . . . 12 ⊢ (𝑧 = 𝑣 → (𝑧 ·o 𝑢) = (𝑣 ·o 𝑢))
11		oveq2 5883	. . . . . . . . . . . . 13 ⊢ (𝑢 = 𝑤 → (𝑣 ·o 𝑢) = (𝑣 ·o 𝑤))
12	11	equcoms 1708	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝑢 → (𝑣 ·o 𝑢) = (𝑣 ·o 𝑤))
13	10, 12	sylan9eq 2230	. . . . . . . . . . 11 ⊢ ((𝑧 = 𝑣 ∧ 𝑤 = 𝑢) → (𝑧 ·o 𝑢) = (𝑣 ·o 𝑤))
14	9, 13	syl 14	. . . . . . . . . 10 ⊢ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) → (𝑧 ·o 𝑢) = (𝑣 ·o 𝑤))
15	14	ancli 323	. . . . . . . . 9 ⊢ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) → ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑣 ·o 𝑤)))
16	15	ad2ant2r 509	. . . . . . . 8 ⊢ (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑣 ·o 𝑤)))
17		pinn 7308	. . . . . . . . . . . . . 14 ⊢ (𝑤 ∈ N → 𝑤 ∈ ω)
18		nnmcom 6490	. . . . . . . . . . . . . 14 ⊢ ((𝑣 ∈ ω ∧ 𝑤 ∈ ω) → (𝑣 ·o 𝑤) = (𝑤 ·o 𝑣))
19	17, 18	sylan2 286	. . . . . . . . . . . . 13 ⊢ ((𝑣 ∈ ω ∧ 𝑤 ∈ N) → (𝑣 ·o 𝑤) = (𝑤 ·o 𝑣))
20	19	eqeq2d 2189	. . . . . . . . . . . 12 ⊢ ((𝑣 ∈ ω ∧ 𝑤 ∈ N) → ((𝑧 ·o 𝑢) = (𝑣 ·o 𝑤) ↔ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
21	20	ancoms 268	. . . . . . . . . . 11 ⊢ ((𝑤 ∈ N ∧ 𝑣 ∈ ω) → ((𝑧 ·o 𝑢) = (𝑣 ·o 𝑤) ↔ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
22	21	ad2ant2lr 510	. . . . . . . . . 10 ⊢ (((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N)) → ((𝑧 ·o 𝑢) = (𝑣 ·o 𝑤) ↔ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
23	22	ad2ant2l 508	. . . . . . . . 9 ⊢ (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → ((𝑧 ·o 𝑢) = (𝑣 ·o 𝑤) ↔ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
24	23	anbi2d 464	. . . . . . . 8 ⊢ (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑣 ·o 𝑤)) ↔ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
25	16, 24	mpbid 147	. . . . . . 7 ⊢ (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
26	25	2eximi 1601	. . . . . 6 ⊢ (∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → ∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
27	26	2eximi 1601	. . . . 5 ⊢ (∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ (𝑧 ∈ ω ∧ 𝑤 ∈ N)) ∧ (𝑓 = ⟨𝑣, 𝑢⟩ ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N))) → ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
28	4, 27	syl 14	. . . 4 ⊢ (𝑓 ∈ (ω × N) → ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))
29	28	ancli 323	. . 3 ⊢ (𝑓 ∈ (ω × N) → (𝑓 ∈ (ω × N) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
30		vex 2741	. . . . 5 ⊢ 𝑓 ∈ V
31		eleq1 2240	. . . . . . 7 ⊢ (𝑥 = 𝑓 → (𝑥 ∈ (ω × N) ↔ 𝑓 ∈ (ω × N)))
32	31	anbi1d 465	. . . . . 6 ⊢ (𝑥 = 𝑓 → ((𝑥 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ↔ (𝑓 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N))))
33		eqeq1 2184	. . . . . . . . 9 ⊢ (𝑥 = 𝑓 → (𝑥 = ⟨𝑧, 𝑤⟩ ↔ 𝑓 = ⟨𝑧, 𝑤⟩))
34	33	anbi1d 465	. . . . . . . 8 ⊢ (𝑥 = 𝑓 → ((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ↔ (𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩)))
35	34	anbi1d 465	. . . . . . 7 ⊢ (𝑥 = 𝑓 → (((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)) ↔ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
36	35	4exbidv 1870	. . . . . 6 ⊢ (𝑥 = 𝑓 → (∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)) ↔ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
37	32, 36	anbi12d 473	. . . . 5 ⊢ (𝑥 = 𝑓 → (((𝑥 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))) ↔ ((𝑓 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))))
38		eleq1 2240	. . . . . . 7 ⊢ (𝑦 = 𝑓 → (𝑦 ∈ (ω × N) ↔ 𝑓 ∈ (ω × N)))
39	38	anbi2d 464	. . . . . 6 ⊢ (𝑦 = 𝑓 → ((𝑓 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ↔ (𝑓 ∈ (ω × N) ∧ 𝑓 ∈ (ω × N))))
40		eqeq1 2184	. . . . . . . . 9 ⊢ (𝑦 = 𝑓 → (𝑦 = ⟨𝑣, 𝑢⟩ ↔ 𝑓 = ⟨𝑣, 𝑢⟩))
41	40	anbi2d 464	. . . . . . . 8 ⊢ (𝑦 = 𝑓 → ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ↔ (𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩)))
42	41	anbi1d 465	. . . . . . 7 ⊢ (𝑦 = 𝑓 → (((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)) ↔ ((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
43	42	4exbidv 1870	. . . . . 6 ⊢ (𝑦 = 𝑓 → (∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)) ↔ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
44	39, 43	anbi12d 473	. . . . 5 ⊢ (𝑦 = 𝑓 → (((𝑓 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))) ↔ ((𝑓 ∈ (ω × N) ∧ 𝑓 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))))
45		df-enq0 7423	. . . . 5 ⊢ ~Q0 = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (ω × N) ∧ 𝑦 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣)))}
46	30, 30, 37, 44, 45	brab 4273	. . . 4 ⊢ (𝑓 ~Q0 𝑓 ↔ ((𝑓 ∈ (ω × N) ∧ 𝑓 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
47		anidm 396	. . . . 5 ⊢ ((𝑓 ∈ (ω × N) ∧ 𝑓 ∈ (ω × N)) ↔ 𝑓 ∈ (ω × N))
48	47	anbi1i 458	. . . 4 ⊢ (((𝑓 ∈ (ω × N) ∧ 𝑓 ∈ (ω × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))) ↔ (𝑓 ∈ (ω × N) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
49	46, 48	bitri 184	. . 3 ⊢ (𝑓 ~Q0 𝑓 ↔ (𝑓 ∈ (ω × N) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑓 = ⟨𝑧, 𝑤⟩ ∧ 𝑓 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·o 𝑢) = (𝑤 ·o 𝑣))))
50	29, 49	sylibr 134	. 2 ⊢ (𝑓 ∈ (ω × N) → 𝑓 ~Q0 𝑓)
51	49	simplbi 274	. 2 ⊢ (𝑓 ~Q0 𝑓 → 𝑓 ∈ (ω × N))
52	50, 51	impbii 126	1 ⊢ (𝑓 ∈ (ω × N) ↔ 𝑓 ~Q0 𝑓)

Syntax hints:   ∧ wa 104   ↔ wb 105   = wceq 1353  ∃wex 1492   ∈ wcel 2148  ⟨cop 3596   class class class wbr 4004  ωcom 4590   × cxp 4625  (class class class)co 5875   ·_o comu 6415  Ncnpi 7271   ~_Q0 ceq0 7285

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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4119  ax-sep 4122  ax-nul 4130  ax-pow 4175  ax-pr 4210  ax-un 4434  ax-setind 4537  ax-iinf 4588

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-ral 2460  df-rex 2461  df-reu 2462  df-rab 2464  df-v 2740  df-sbc 2964  df-csb 3059  df-dif 3132  df-un 3134  df-in 3136  df-ss 3143  df-nul 3424  df-pw 3578  df-sn 3599  df-pr 3600  df-op 3602  df-uni 3811  df-int 3846  df-iun 3889  df-br 4005  df-opab 4066  df-mpt 4067  df-tr 4103  df-id 4294  df-iord 4367  df-on 4369  df-suc 4372  df-iom 4591  df-xp 4633  df-rel 4634  df-cnv 4635  df-co 4636  df-dm 4637  df-rn 4638  df-res 4639  df-ima 4640  df-iota 5179  df-fun 5219  df-fn 5220  df-f 5221  df-f1 5222  df-fo 5223  df-f1o 5224  df-fv 5225  df-ov 5878  df-oprab 5879  df-mpo 5880  df-1st 6141  df-2nd 6142  df-recs 6306  df-irdg 6371  df-oadd 6421  df-omul 6422  df-ni 7303  df-enq0 7423

This theorem is referenced by:  enq0er  7434