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| Mirrors > Home > ILE Home > Th. List > enq0eceq | GIF version | ||
| Description: Equivalence class equality of nonnegative fractions in terms of natural numbers. (Contributed by Jim Kingdon, 24-Nov-2019.) |
| Ref | Expression |
|---|---|
| enq0eceq | ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → ([〈𝐴, 𝐵〉] ~Q0 = [〈𝐶, 𝐷〉] ~Q0 ↔ (𝐴 ·o 𝐷) = (𝐵 ·o 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | enq0er 7657 | . . . 4 ⊢ ~Q0 Er (ω × N) | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → ~Q0 Er (ω × N)) |
| 3 | opelxpi 4756 | . . . 4 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ N) → 〈𝐴, 𝐵〉 ∈ (ω × N)) | |
| 4 | 3 | adantr 276 | . . 3 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → 〈𝐴, 𝐵〉 ∈ (ω × N)) |
| 5 | 2, 4 | erth 6750 | . 2 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → (〈𝐴, 𝐵〉 ~Q0 〈𝐶, 𝐷〉 ↔ [〈𝐴, 𝐵〉] ~Q0 = [〈𝐶, 𝐷〉] ~Q0 )) |
| 6 | enq0breq 7658 | . 2 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → (〈𝐴, 𝐵〉 ~Q0 〈𝐶, 𝐷〉 ↔ (𝐴 ·o 𝐷) = (𝐵 ·o 𝐶))) | |
| 7 | 5, 6 | bitr3d 190 | 1 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ N) ∧ (𝐶 ∈ ω ∧ 𝐷 ∈ N)) → ([〈𝐴, 𝐵〉] ~Q0 = [〈𝐶, 𝐷〉] ~Q0 ↔ (𝐴 ·o 𝐷) = (𝐵 ·o 𝐶))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1397 ∈ wcel 2201 〈cop 3671 class class class wbr 4087 ωcom 4687 × cxp 4722 (class class class)co 6020 ·o comu 6582 Er wer 6701 [cec 6702 Ncnpi 7494 ~Q0 ceq0 7508 |
| 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 2203 ax-14 2204 ax-ext 2212 ax-coll 4203 ax-sep 4206 ax-nul 4214 ax-pow 4263 ax-pr 4298 ax-un 4529 ax-setind 4634 ax-iinf 4685 |
| 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 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-ral 2514 df-rex 2515 df-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-nul 3494 df-pw 3653 df-sn 3674 df-pr 3675 df-op 3677 df-uni 3893 df-int 3928 df-iun 3971 df-br 4088 df-opab 4150 df-mpt 4151 df-tr 4187 df-id 4389 df-iord 4462 df-on 4464 df-suc 4467 df-iom 4688 df-xp 4730 df-rel 4731 df-cnv 4732 df-co 4733 df-dm 4734 df-rn 4735 df-res 4736 df-ima 4737 df-iota 5285 df-fun 5327 df-fn 5328 df-f 5329 df-f1 5330 df-fo 5331 df-f1o 5332 df-fv 5333 df-ov 6023 df-oprab 6024 df-mpo 6025 df-1st 6305 df-2nd 6306 df-recs 6473 df-irdg 6538 df-oadd 6588 df-omul 6589 df-er 6704 df-ec 6706 df-ni 7526 df-enq0 7646 |
| This theorem is referenced by: nq0m0r 7678 |
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