| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Equivalence class equality of positive fractions in terms of positive integers. |
| Ref | Expression |
|---|---|
| enqeceq | ⊢ (((A ∈ N ∧ B ∈ N) ∧ (C ∈ N ∧ D ∈ N)) → ([〈A, B〉] ~Q = [〈C, D〉] ~Q ↔ (A ·N D) = (B ·N C))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm3.26 256 | . . 3 ⊢ (((A ∈ N ∧ B ∈ N) ∧ (C ∈ N ∧ D ∈ N)) → (A ∈ N ∧ B ∈ N)) | |
| 2 | opelxpi 2455 | . . . 4 ⊢ ((A ∈ N ∧ B ∈ N) → 〈A, B〉 ∈ (N × N)) | |
| 3 | dmenq 3839 | . . . . 5 ⊢ dom ~Q = (N × N) | |
| 4 | 3 | eleq2i 1153 | . . . 4 ⊢ (〈A, B〉 ∈ dom ~Q ↔ 〈A, B〉 ∈ (N × N)) |
| 5 | 2, 4 | sylibr 175 | . . 3 ⊢ ((A ∈ N ∧ B ∈ N) → 〈A, B〉 ∈ dom ~Q ) |
| 6 | opex 1893 | . . . 4 ⊢ 〈C, D〉 ∈ V | |
| 7 | enqer 3840 | . . . 4 ⊢ Er ~Q | |
| 8 | 6, 7 | erthdm 3220 | . . 3 ⊢ (〈A, B〉 ∈ dom ~Q → ([〈A, B〉] ~Q = [〈C, D〉] ~Q ↔ 〈A, B〉 ~Q 〈C, D〉)) |
| 9 | 1, 5, 8 | 3syl 21 | . 2 ⊢ (((A ∈ N ∧ B ∈ N) ∧ (C ∈ N ∧ D ∈ N)) → ([〈A, B〉] ~Q = [〈C, D〉] ~Q ↔ 〈A, B〉 ~Q 〈C, D〉)) |
| 10 | enqbreq 3838 | . 2 ⊢ (((A ∈ N ∧ B ∈ N) ∧ (C ∈ N ∧ D ∈ N)) → (〈A, B〉 ~Q 〈C, D〉 ↔ (A ·N D) = (B ·N C))) | |
| 11 | 9, 10 | bitrd 406 | 1 ⊢ (((A ∈ N ∧ B ∈ N) ∧ (C ∈ N ∧ D ∈ N)) → ([〈A, B〉] ~Q = [〈C, D〉] ~Q ↔ (A ·N D) = (B ·N C))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 ∧ wa 196 = wceq 1091 ∈ wcel 1092 〈cop 1810 class class class wbr 2054 × cxp 2408 dom cdm 2410 (class class class)co 3001 [cec 3198 Ncnpi 3766 ·N cmi 3768 &nbSp; ~Q ceq 3772 |
| This theorem is referenced by: ordpipq 3850 ltsopq 3869 prlem934b 3932 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-reu 1207 df-rab 1208 df-v 1349 df-sbc 1441 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-if 1777 df-pw 1799 df-sn 1811 df-pr 1812 df-tp 1814 df-op 1815 df-uni 1920 df-int 1966 df-iun 1996 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-id 2125 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-lim 2204 df-suc 2205 df-om 2373 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-fv 2438 df-rdg 2970 df-opr 3003 df-oprab 3004 df-oadd 3106 df-omul 3107 df-er 3200 df-ec 3202 df-ni 3794 df-mi 3796 df-enq 3831 |