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| Mirrors > Home > ILE Home > Th. List > ecopqsi | GIF version | ||
| Description: "Closure" law for equivalence class of ordered pairs. (Contributed by NM, 25-Mar-1996.) |
| Ref | Expression |
|---|---|
| ecopqsi.1 | ⊢ 𝑅 ∈ V |
| ecopqsi.2 | ⊢ 𝑆 = ((𝐴 × 𝐴) / 𝑅) |
| Ref | Expression |
|---|---|
| ecopqsi | ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → [〈𝐵, 𝐶〉]𝑅 ∈ 𝑆) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opelxpi 4763 | . 2 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → 〈𝐵, 𝐶〉 ∈ (𝐴 × 𝐴)) | |
| 2 | ecopqsi.1 | . . . 4 ⊢ 𝑅 ∈ V | |
| 3 | 2 | ecelqsi 6801 | . . 3 ⊢ (〈𝐵, 𝐶〉 ∈ (𝐴 × 𝐴) → [〈𝐵, 𝐶〉]𝑅 ∈ ((𝐴 × 𝐴) / 𝑅)) |
| 4 | ecopqsi.2 | . . 3 ⊢ 𝑆 = ((𝐴 × 𝐴) / 𝑅) | |
| 5 | 3, 4 | eleqtrrdi 2325 | . 2 ⊢ (〈𝐵, 𝐶〉 ∈ (𝐴 × 𝐴) → [〈𝐵, 𝐶〉]𝑅 ∈ 𝑆) |
| 6 | 1, 5 | syl 14 | 1 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → [〈𝐵, 𝐶〉]𝑅 ∈ 𝑆) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2202 Vcvv 2803 〈cop 3676 × cxp 4729 [cec 6743 / cqs 6744 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-xp 4737 df-cnv 4739 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-ec 6747 df-qs 6751 |
| This theorem is referenced by: brecop 6837 recexgt0sr 8036 ltpsrprg 8066 |
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