Theorem nqnq0m 7668

Description: Multiplication of positive fractions is equal with ·_Q or ·_Q0. (Contributed by Jim Kingdon, 10-Nov-2019.)

Assertion

Ref	Expression
nqnq0m	⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))

Proof of Theorem nqnq0m

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

Step	Hyp	Ref	Expression
1		nqpi 7591	. . . 4 ⊢ (𝐴 ∈ Q → ∃𝑧∃𝑤((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ))
2		nqpi 7591	. . . 4 ⊢ (𝐵 ∈ Q → ∃𝑣∃𝑢((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q ))
3	1, 2	anim12i 338	. . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (∃𝑧∃𝑤((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ∃𝑣∃𝑢((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )))
4		ee4anv 1985	. . 3 ⊢ (∃𝑧∃𝑤∃𝑣∃𝑢(((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) ↔ (∃𝑧∃𝑤((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ∃𝑣∃𝑢((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )))
5	3, 4	sylibr 134	. 2 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → ∃𝑧∃𝑤∃𝑣∃𝑢(((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )))
6		oveq12 6022	. . . . . . 7 ⊢ ((𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q ) → (𝐴 ·Q 𝐵) = ([⟨𝑧, 𝑤⟩] ~Q ·Q [⟨𝑣, 𝑢⟩] ~Q ))
7		mulpiord 7530	. . . . . . . . . . 11 ⊢ ((𝑧 ∈ N ∧ 𝑣 ∈ N) → (𝑧 ·N 𝑣) = (𝑧 ·o 𝑣))
8	7	ad2ant2r 509	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝑧 ·N 𝑣) = (𝑧 ·o 𝑣))
9		mulpiord 7530	. . . . . . . . . . 11 ⊢ ((𝑤 ∈ N ∧ 𝑢 ∈ N) → (𝑤 ·N 𝑢) = (𝑤 ·o 𝑢))
10	9	ad2ant2l 508	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝑤 ·N 𝑢) = (𝑤 ·o 𝑢))
11	8, 10	opeq12d 3868	. . . . . . . . 9 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩ = ⟨(𝑧 ·o 𝑣), (𝑤 ·o 𝑢)⟩)
12	11	eceq1d 6733	. . . . . . . 8 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q0 = [⟨(𝑧 ·o 𝑣), (𝑤 ·o 𝑢)⟩] ~Q0 )
13		mulpipqqs 7586	. . . . . . . . 9 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ([⟨𝑧, 𝑤⟩] ~Q ·Q [⟨𝑣, 𝑢⟩] ~Q ) = [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q )
14		mulclpi 7541	. . . . . . . . . . 11 ⊢ ((𝑧 ∈ N ∧ 𝑣 ∈ N) → (𝑧 ·N 𝑣) ∈ N)
15	14	ad2ant2r 509	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝑧 ·N 𝑣) ∈ N)
16		mulclpi 7541	. . . . . . . . . . 11 ⊢ ((𝑤 ∈ N ∧ 𝑢 ∈ N) → (𝑤 ·N 𝑢) ∈ N)
17	16	ad2ant2l 508	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝑤 ·N 𝑢) ∈ N)
18		nqnq0pi 7651	. . . . . . . . . 10 ⊢ (((𝑧 ·N 𝑣) ∈ N ∧ (𝑤 ·N 𝑢) ∈ N) → [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q0 = [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q )
19	15, 17, 18	syl2anc 411	. . . . . . . . 9 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q0 = [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q )
20	13, 19	eqtr4d 2265	. . . . . . . 8 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ([⟨𝑧, 𝑤⟩] ~Q ·Q [⟨𝑣, 𝑢⟩] ~Q ) = [⟨(𝑧 ·N 𝑣), (𝑤 ·N 𝑢)⟩] ~Q0 )
21		pinn 7522	. . . . . . . . . 10 ⊢ (𝑧 ∈ N → 𝑧 ∈ ω)
22	21	anim1i 340	. . . . . . . . 9 ⊢ ((𝑧 ∈ N ∧ 𝑤 ∈ N) → (𝑧 ∈ ω ∧ 𝑤 ∈ N))
23		pinn 7522	. . . . . . . . . 10 ⊢ (𝑣 ∈ N → 𝑣 ∈ ω)
24	23	anim1i 340	. . . . . . . . 9 ⊢ ((𝑣 ∈ N ∧ 𝑢 ∈ N) → (𝑣 ∈ ω ∧ 𝑢 ∈ N))
25		mulnnnq0 7663	. . . . . . . . 9 ⊢ (((𝑧 ∈ ω ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ ω ∧ 𝑢 ∈ N)) → ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ) = [⟨(𝑧 ·o 𝑣), (𝑤 ·o 𝑢)⟩] ~Q0 )
26	22, 24, 25	syl2an 289	. . . . . . . 8 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ) = [⟨(𝑧 ·o 𝑣), (𝑤 ·o 𝑢)⟩] ~Q0 )
27	12, 20, 26	3eqtr4d 2272	. . . . . . 7 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ([⟨𝑧, 𝑤⟩] ~Q ·Q [⟨𝑣, 𝑢⟩] ~Q ) = ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ))
28	6, 27	sylan9eqr 2284	. . . . . 6 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q 𝐵) = ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ))
29		nqnq0pi 7651	. . . . . . . . . . 11 ⊢ ((𝑧 ∈ N ∧ 𝑤 ∈ N) → [⟨𝑧, 𝑤⟩] ~Q0 = [⟨𝑧, 𝑤⟩] ~Q )
30	29	adantr 276	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → [⟨𝑧, 𝑤⟩] ~Q0 = [⟨𝑧, 𝑤⟩] ~Q )
31	30	eqeq2d 2241	. . . . . . . . 9 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝐴 = [⟨𝑧, 𝑤⟩] ~Q0 ↔ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ))
32		nqnq0pi 7651	. . . . . . . . . . 11 ⊢ ((𝑣 ∈ N ∧ 𝑢 ∈ N) → [⟨𝑣, 𝑢⟩] ~Q0 = [⟨𝑣, 𝑢⟩] ~Q )
33	32	adantl 277	. . . . . . . . . 10 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → [⟨𝑣, 𝑢⟩] ~Q0 = [⟨𝑣, 𝑢⟩] ~Q )
34	33	eqeq2d 2241	. . . . . . . . 9 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → (𝐵 = [⟨𝑣, 𝑢⟩] ~Q0 ↔ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q ))
35	31, 34	anbi12d 473	. . . . . . . 8 ⊢ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) → ((𝐴 = [⟨𝑧, 𝑤⟩] ~Q0 ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q0 ) ↔ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )))
36	35	pm5.32i 454	. . . . . . 7 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q0 ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q0 )) ↔ (((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )))
37		oveq12 6022	. . . . . . . 8 ⊢ ((𝐴 = [⟨𝑧, 𝑤⟩] ~Q0 ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q0 ) → (𝐴 ·Q0 𝐵) = ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ))
38	37	adantl 277	. . . . . . 7 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q0 ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q0 )) → (𝐴 ·Q0 𝐵) = ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ))
39	36, 38	sylbir 135	. . . . . 6 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q0 𝐵) = ([⟨𝑧, 𝑤⟩] ~Q0 ·Q0 [⟨𝑣, 𝑢⟩] ~Q0 ))
40	28, 39	eqtr4d 2265	. . . . 5 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ (𝑣 ∈ N ∧ 𝑢 ∈ N)) ∧ (𝐴 = [⟨𝑧, 𝑤⟩] ~Q ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))
41	40	an4s 590	. . . 4 ⊢ ((((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))
42	41	exlimivv 1943	. . 3 ⊢ (∃𝑣∃𝑢(((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))
43	42	exlimivv 1943	. 2 ⊢ (∃𝑧∃𝑤∃𝑣∃𝑢(((𝑧 ∈ N ∧ 𝑤 ∈ N) ∧ 𝐴 = [⟨𝑧, 𝑤⟩] ~Q ) ∧ ((𝑣 ∈ N ∧ 𝑢 ∈ N) ∧ 𝐵 = [⟨𝑣, 𝑢⟩] ~Q )) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))
44	5, 43	syl 14	1 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 ·Q 𝐵) = (𝐴 ·Q0 𝐵))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1395  ∃wex 1538   ∈ wcel 2200  ⟨cop 3670  ωcom 4686  (class class class)co 6013   ·_o comu 6575  [cec 6695  Ncnpi 7485   ·_N cmi 7487   ~_Q ceq 7492  Qcnq 7493   ·_Q cmq 7496   ~_Q0 ceq0 7499   ·_Q0 cmq0 7503

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4202  ax-sep 4205  ax-nul 4213  ax-pow 4262  ax-pr 4297  ax-un 4528  ax-setind 4633  ax-iinf 4684

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2802  df-sbc 3030  df-csb 3126  df-dif 3200  df-un 3202  df-in 3204  df-ss 3211  df-nul 3493  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-int 3927  df-iun 3970  df-br 4087  df-opab 4149  df-mpt 4150  df-tr 4186  df-id 4388  df-iord 4461  df-on 4463  df-suc 4466  df-iom 4687  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-f1 5329  df-fo 5330  df-f1o 5331  df-fv 5332  df-ov 6016  df-oprab 6017  df-mpo 6018  df-1st 6298  df-2nd 6299  df-recs 6466  df-irdg 6531  df-oadd 6581  df-omul 6582  df-er 6697  df-ec 6699  df-qs 6703  df-ni 7517  df-mi 7519  df-mpq 7558  df-enq 7560  df-nqqs 7561  df-mqqs 7563  df-enq0 7637  df-nq0 7638  df-mq0 7641

This theorem is referenced by:  prarloclemlo  7707  prarloclemcalc  7715