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Theorem ltmnqg 7487
Description: Ordering property of multiplication for positive fractions. Proposition 9-2.6(iii) of [Gleason] p. 120. (Contributed by Jim Kingdon, 22-Sep-2019.)
Assertion
Ref Expression
ltmnqg ((𝐴Q𝐵Q𝐶Q) → (𝐴 <Q 𝐵 ↔ (𝐶 ·Q 𝐴) <Q (𝐶 ·Q 𝐵)))

Proof of Theorem ltmnqg
Dummy variables 𝑥 𝑦 𝑧 𝑤 𝑣 𝑢 𝑓 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-nqqs 7434 . 2 Q = ((N × N) / ~Q )
2 breq1 4037 . . 3 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q ))
3 oveq2 5933 . . . 4 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴))
43breq1d 4044 . . 3 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → (([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q )))
52, 4bibi12d 235 . 2 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → (([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q )) ↔ (𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ))))
6 breq2 4038 . . 3 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → (𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q𝐴 <Q 𝐵))
7 oveq2 5933 . . . 4 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵))
87breq2d 4046 . . 3 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → (([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵)))
96, 8bibi12d 235 . 2 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → ((𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q )) ↔ (𝐴 <Q 𝐵 ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵))))
10 oveq1 5932 . . . 4 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) = (𝐶 ·Q 𝐴))
11 oveq1 5932 . . . 4 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵) = (𝐶 ·Q 𝐵))
1210, 11breq12d 4047 . . 3 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → (([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵) ↔ (𝐶 ·Q 𝐴) <Q (𝐶 ·Q 𝐵)))
1312bibi2d 232 . 2 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → ((𝐴 <Q 𝐵 ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵)) ↔ (𝐴 <Q 𝐵 ↔ (𝐶 ·Q 𝐴) <Q (𝐶 ·Q 𝐵))))
14 mulclpi 7414 . . . . . . . 8 ((𝑓N𝑔N) → (𝑓 ·N 𝑔) ∈ N)
1514adantl 277 . . . . . . 7 ((((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) ∧ (𝑓N𝑔N)) → (𝑓 ·N 𝑔) ∈ N)
16 simp1l 1023 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑥N)
17 simp2r 1026 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑤N)
1815, 16, 17caovcld 6081 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑥 ·N 𝑤) ∈ N)
19 simp1r 1024 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑦N)
20 simp2l 1025 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑧N)
2115, 19, 20caovcld 6081 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑦 ·N 𝑧) ∈ N)
22 mulclpi 7414 . . . . . . 7 ((𝑣N𝑢N) → (𝑣 ·N 𝑢) ∈ N)
23223ad2ant3 1022 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑢) ∈ N)
24 ltmpig 7425 . . . . . 6 (((𝑥 ·N 𝑤) ∈ N ∧ (𝑦 ·N 𝑧) ∈ N ∧ (𝑣 ·N 𝑢) ∈ N) → ((𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧) ↔ ((𝑣 ·N 𝑢) ·N (𝑥 ·N 𝑤)) <N ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧))))
2518, 21, 23, 24syl3anc 1249 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧) ↔ ((𝑣 ·N 𝑢) ·N (𝑥 ·N 𝑤)) <N ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧))))
26 simp3l 1027 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑣N)
27 simp3r 1028 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑢N)
28 mulcompig 7417 . . . . . . . 8 ((𝑓N𝑔N) → (𝑓 ·N 𝑔) = (𝑔 ·N 𝑓))
2928adantl 277 . . . . . . 7 ((((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) ∧ (𝑓N𝑔N)) → (𝑓 ·N 𝑔) = (𝑔 ·N 𝑓))
30 mulasspig 7418 . . . . . . . 8 ((𝑓N𝑔NN) → ((𝑓 ·N 𝑔) ·N ) = (𝑓 ·N (𝑔 ·N )))
3130adantl 277 . . . . . . 7 ((((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) ∧ (𝑓N𝑔NN)) → ((𝑓 ·N 𝑔) ·N ) = (𝑓 ·N (𝑔 ·N )))
3226, 16, 27, 29, 31, 17, 15caov4d 6112 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑣 ·N 𝑥) ·N (𝑢 ·N 𝑤)) = ((𝑣 ·N 𝑢) ·N (𝑥 ·N 𝑤)))
3327, 19, 26, 29, 31, 20, 15caov4d 6112 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧)) = ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)))
34 mulcompig 7417 . . . . . . . . . 10 ((𝑢N𝑣N) → (𝑢 ·N 𝑣) = (𝑣 ·N 𝑢))
3534oveq1d 5940 . . . . . . . . 9 ((𝑢N𝑣N) → ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
3635ancoms 268 . . . . . . . 8 ((𝑣N𝑢N) → ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
37363ad2ant3 1022 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
3833, 37eqtrd 2229 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
3932, 38breq12d 4047 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (((𝑣 ·N 𝑥) ·N (𝑢 ·N 𝑤)) <N ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧)) ↔ ((𝑣 ·N 𝑢) ·N (𝑥 ·N 𝑤)) <N ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧))))
4025, 39bitr4d 191 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧) ↔ ((𝑣 ·N 𝑥) ·N (𝑢 ·N 𝑤)) <N ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧))))
41 ordpipqqs 7460 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ (𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧)))
42413adant3 1019 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ (𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧)))
4315, 26, 16caovcld 6081 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑥) ∈ N)
4415, 27, 19caovcld 6081 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑢 ·N 𝑦) ∈ N)
4515, 26, 20caovcld 6081 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑧) ∈ N)
4615, 27, 17caovcld 6081 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑢 ·N 𝑤) ∈ N)
47 ordpipqqs 7460 . . . . 5 ((((𝑣 ·N 𝑥) ∈ N ∧ (𝑢 ·N 𝑦) ∈ N) ∧ ((𝑣 ·N 𝑧) ∈ N ∧ (𝑢 ·N 𝑤) ∈ N)) → ([⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q <Q [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q ↔ ((𝑣 ·N 𝑥) ·N (𝑢 ·N 𝑤)) <N ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧))))
4843, 44, 45, 46, 47syl22anc 1250 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q <Q [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q ↔ ((𝑣 ·N 𝑥) ·N (𝑢 ·N 𝑤)) <N ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧))))
4940, 42, 483bitr4d 220 . . 3 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q <Q [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q ))
50 mulpipqqs 7459 . . . . . 6 (((𝑣N𝑢N) ∧ (𝑥N𝑦N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q )
5150ancoms 268 . . . . 5 (((𝑥N𝑦N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q )
52513adant2 1018 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q )
53 mulpipqqs 7459 . . . . . 6 (((𝑣N𝑢N) ∧ (𝑧N𝑤N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q )
5453ancoms 268 . . . . 5 (((𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q )
55543adant1 1017 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q )
5652, 55breq12d 4047 . . 3 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) ↔ [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q <Q [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q ))
5749, 56bitr4d 191 . 2 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) <Q ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q )))
581, 5, 9, 13, 573ecoptocl 6692 1 ((𝐴Q𝐵Q𝐶Q) → (𝐴 <Q 𝐵 ↔ (𝐶 ·Q 𝐴) <Q (𝐶 ·Q 𝐵)))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105  w3a 980   = wceq 1364  wcel 2167  cop 3626   class class class wbr 4034  (class class class)co 5925  [cec 6599  Ncnpi 7358   ·N cmi 7360   <N clti 7361   ~Q ceq 7365  Qcnq 7366   ·Q cmq 7369   <Q cltq 7371
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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4149  ax-sep 4152  ax-nul 4160  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-iinf 4625
This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-iun 3919  df-br 4035  df-opab 4096  df-mpt 4097  df-tr 4133  df-eprel 4325  df-id 4329  df-iord 4402  df-on 4404  df-suc 4407  df-iom 4628  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-f 5263  df-f1 5264  df-fo 5265  df-f1o 5266  df-fv 5267  df-ov 5928  df-oprab 5929  df-mpo 5930  df-1st 6207  df-2nd 6208  df-recs 6372  df-irdg 6437  df-oadd 6487  df-omul 6488  df-er 6601  df-ec 6603  df-qs 6607  df-ni 7390  df-mi 7392  df-lti 7393  df-mpq 7431  df-enq 7433  df-nqqs 7434  df-mqqs 7436  df-ltnqqs 7439
This theorem is referenced by:  ltmnqi  7489  lt2mulnq  7491  ltaddnq  7493  prarloclemarch  7504  prarloclemarch2  7505  ltrnqg  7506  prarloclemlt  7579  addnqprllem  7613  addnqprulem  7614  appdivnq  7649  mulnqprl  7654  mulnqpru  7655  mullocprlem  7656  mulclpr  7658  distrlem4prl  7670  distrlem4pru  7671  1idprl  7676  1idpru  7677  recexprlem1ssl  7719  recexprlem1ssu  7720
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