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Theorem ltmnqg 7621
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 7568 . 2 Q = ((N × N) / ~Q )
2 breq1 4091 . . 3 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q ))
3 oveq2 6026 . . . 4 ([⟨𝑥, 𝑦⟩] ~Q = 𝐴 → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴))
43breq1d 4098 . . 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 4092 . . 3 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → (𝐴 <Q [⟨𝑧, 𝑤⟩] ~Q𝐴 <Q 𝐵))
7 oveq2 6026 . . . 4 ([⟨𝑧, 𝑤⟩] ~Q = 𝐵 → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵))
87breq2d 4100 . . 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 6025 . . . 4 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐴) = (𝐶 ·Q 𝐴))
11 oveq1 6025 . . . 4 ([⟨𝑣, 𝑢⟩] ~Q = 𝐶 → ([⟨𝑣, 𝑢⟩] ~Q ·Q 𝐵) = (𝐶 ·Q 𝐵))
1210, 11breq12d 4101 . . 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 7548 . . . . . . . 8 ((𝑓N𝑔N) → (𝑓 ·N 𝑔) ∈ N)
1514adantl 277 . . . . . . 7 ((((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) ∧ (𝑓N𝑔N)) → (𝑓 ·N 𝑔) ∈ N)
16 simp1l 1047 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑥N)
17 simp2r 1050 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑤N)
1815, 16, 17caovcld 6176 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑥 ·N 𝑤) ∈ N)
19 simp1r 1048 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑦N)
20 simp2l 1049 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑧N)
2115, 19, 20caovcld 6176 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑦 ·N 𝑧) ∈ N)
22 mulclpi 7548 . . . . . . 7 ((𝑣N𝑢N) → (𝑣 ·N 𝑢) ∈ N)
23223ad2ant3 1046 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑢) ∈ N)
24 ltmpig 7559 . . . . . 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 1273 . . . . 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 1051 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑣N)
27 simp3r 1052 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → 𝑢N)
28 mulcompig 7551 . . . . . . . 8 ((𝑓N𝑔N) → (𝑓 ·N 𝑔) = (𝑔 ·N 𝑓))
2928adantl 277 . . . . . . 7 ((((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) ∧ (𝑓N𝑔N)) → (𝑓 ·N 𝑔) = (𝑔 ·N 𝑓))
30 mulasspig 7552 . . . . . . . 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 6207 . . . . . 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 6207 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧)) = ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)))
34 mulcompig 7551 . . . . . . . . . 10 ((𝑢N𝑣N) → (𝑢 ·N 𝑣) = (𝑣 ·N 𝑢))
3534oveq1d 6033 . . . . . . . . 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 1046 . . . . . . 7 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑣) ·N (𝑦 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
3833, 37eqtrd 2264 . . . . . 6 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ((𝑢 ·N 𝑦) ·N (𝑣 ·N 𝑧)) = ((𝑣 ·N 𝑢) ·N (𝑦 ·N 𝑧)))
3932, 38breq12d 4101 . . . . 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 7594 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ (𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧)))
42413adant3 1043 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑥, 𝑦⟩] ~Q <Q [⟨𝑧, 𝑤⟩] ~Q ↔ (𝑥 ·N 𝑤) <N (𝑦 ·N 𝑧)))
4315, 26, 16caovcld 6176 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑥) ∈ N)
4415, 27, 19caovcld 6176 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑢 ·N 𝑦) ∈ N)
4515, 26, 20caovcld 6176 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑣 ·N 𝑧) ∈ N)
4615, 27, 17caovcld 6176 . . . . 5 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → (𝑢 ·N 𝑤) ∈ N)
47 ordpipqqs 7594 . . . . 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 1274 . . . 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 7593 . . . . . 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 1042 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑥, 𝑦⟩] ~Q ) = [⟨(𝑣 ·N 𝑥), (𝑢 ·N 𝑦)⟩] ~Q )
53 mulpipqqs 7593 . . . . . 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 1041 . . . 4 (((𝑥N𝑦N) ∧ (𝑧N𝑤N) ∧ (𝑣N𝑢N)) → ([⟨𝑣, 𝑢⟩] ~Q ·Q [⟨𝑧, 𝑤⟩] ~Q ) = [⟨(𝑣 ·N 𝑧), (𝑢 ·N 𝑤)⟩] ~Q )
5652, 55breq12d 4101 . . 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 6793 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 1004   = wceq 1397  wcel 2202  cop 3672   class class class wbr 4088  (class class class)co 6018  [cec 6700  Ncnpi 7492   ·N cmi 7494   <N clti 7495   ~Q ceq 7499  Qcnq 7500   ·Q cmq 7503   <Q cltq 7505
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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-iinf 4686
This theorem depends on definitions:  df-bi 117  df-dc 842  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-eprel 4386  df-id 4390  df-iord 4463  df-on 4465  df-suc 4468  df-iom 4689  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-ov 6021  df-oprab 6022  df-mpo 6023  df-1st 6303  df-2nd 6304  df-recs 6471  df-irdg 6536  df-oadd 6586  df-omul 6587  df-er 6702  df-ec 6704  df-qs 6708  df-ni 7524  df-mi 7526  df-lti 7527  df-mpq 7565  df-enq 7567  df-nqqs 7568  df-mqqs 7570  df-ltnqqs 7573
This theorem is referenced by:  ltmnqi  7623  lt2mulnq  7625  ltaddnq  7627  prarloclemarch  7638  prarloclemarch2  7639  ltrnqg  7640  prarloclemlt  7713  addnqprllem  7747  addnqprulem  7748  appdivnq  7783  mulnqprl  7788  mulnqpru  7789  mullocprlem  7790  mulclpr  7792  distrlem4prl  7804  distrlem4pru  7805  1idprl  7810  1idpru  7811  recexprlem1ssl  7853  recexprlem1ssu  7854
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