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Mirrors > Home > MPE Home > Th. List > ordpinq | Structured version Visualization version GIF version |
Description: Ordering of positive fractions in terms of positive integers. (Contributed by NM, 13-Feb-1996.) (Revised by Mario Carneiro, 28-Apr-2013.) (New usage is discouraged.) |
Ref | Expression |
---|---|
ordpinq | ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <Q 𝐵 ↔ ((1st ‘𝐴) ·N (2nd ‘𝐵)) <N ((1st ‘𝐵) ·N (2nd ‘𝐴)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brinxp 5595 | . . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <pQ 𝐵 ↔ 𝐴( <pQ ∩ (Q × Q))𝐵)) | |
2 | df-ltnq 10411 | . . . 4 ⊢ <Q = ( <pQ ∩ (Q × Q)) | |
3 | 2 | breqi 5033 | . . 3 ⊢ (𝐴 <Q 𝐵 ↔ 𝐴( <pQ ∩ (Q × Q))𝐵) |
4 | 1, 3 | bitr4di 292 | . 2 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <pQ 𝐵 ↔ 𝐴 <Q 𝐵)) |
5 | relxp 5537 | . . . . 5 ⊢ Rel (N × N) | |
6 | elpqn 10418 | . . . . 5 ⊢ (𝐴 ∈ Q → 𝐴 ∈ (N × N)) | |
7 | 1st2nd 7756 | . . . . 5 ⊢ ((Rel (N × N) ∧ 𝐴 ∈ (N × N)) → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) | |
8 | 5, 6, 7 | sylancr 590 | . . . 4 ⊢ (𝐴 ∈ Q → 𝐴 = 〈(1st ‘𝐴), (2nd ‘𝐴)〉) |
9 | elpqn 10418 | . . . . 5 ⊢ (𝐵 ∈ Q → 𝐵 ∈ (N × N)) | |
10 | 1st2nd 7756 | . . . . 5 ⊢ ((Rel (N × N) ∧ 𝐵 ∈ (N × N)) → 𝐵 = 〈(1st ‘𝐵), (2nd ‘𝐵)〉) | |
11 | 5, 9, 10 | sylancr 590 | . . . 4 ⊢ (𝐵 ∈ Q → 𝐵 = 〈(1st ‘𝐵), (2nd ‘𝐵)〉) |
12 | 8, 11 | breqan12d 5043 | . . 3 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <pQ 𝐵 ↔ 〈(1st ‘𝐴), (2nd ‘𝐴)〉 <pQ 〈(1st ‘𝐵), (2nd ‘𝐵)〉)) |
13 | ordpipq 10435 | . . 3 ⊢ (〈(1st ‘𝐴), (2nd ‘𝐴)〉 <pQ 〈(1st ‘𝐵), (2nd ‘𝐵)〉 ↔ ((1st ‘𝐴) ·N (2nd ‘𝐵)) <N ((1st ‘𝐵) ·N (2nd ‘𝐴))) | |
14 | 12, 13 | bitrdi 290 | . 2 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <pQ 𝐵 ↔ ((1st ‘𝐴) ·N (2nd ‘𝐵)) <N ((1st ‘𝐵) ·N (2nd ‘𝐴)))) |
15 | 4, 14 | bitr3d 284 | 1 ⊢ ((𝐴 ∈ Q ∧ 𝐵 ∈ Q) → (𝐴 <Q 𝐵 ↔ ((1st ‘𝐴) ·N (2nd ‘𝐵)) <N ((1st ‘𝐵) ·N (2nd ‘𝐴)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1542 ∈ wcel 2113 ∩ cin 3840 〈cop 4519 class class class wbr 5027 × cxp 5517 Rel wrel 5524 ‘cfv 6333 (class class class)co 7164 1st c1st 7705 2nd c2nd 7706 Ncnpi 10337 ·N cmi 10339 <N clti 10340 <pQ cltpq 10343 Qcnq 10345 <Q cltq 10351 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1916 ax-6 1974 ax-7 2019 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2161 ax-12 2178 ax-ext 2710 ax-sep 5164 ax-nul 5171 ax-pr 5293 ax-un 7473 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-ral 3058 df-rex 3059 df-rab 3062 df-v 3399 df-sbc 3680 df-csb 3789 df-dif 3844 df-un 3846 df-in 3848 df-ss 3858 df-nul 4210 df-if 4412 df-sn 4514 df-pr 4516 df-op 4520 df-uni 4794 df-iun 4880 df-br 5028 df-opab 5090 df-mpt 5108 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6291 df-fun 6335 df-fn 6336 df-f 6337 df-fv 6341 df-ov 7167 df-oprab 7168 df-mpo 7169 df-om 7594 df-1st 7707 df-2nd 7708 df-omul 8129 df-ni 10365 df-mi 10367 df-lti 10368 df-ltpq 10403 df-nq 10405 df-ltnq 10411 |
This theorem is referenced by: ltsonq 10462 lterpq 10463 ltanq 10464 ltmnq 10465 ltexnq 10468 archnq 10473 |
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