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| Mirrors > Home > ILE Home > Th. List > 2ecoptocl | GIF version | ||
| Description: Implicit substitution of classes for equivalence classes of ordered pairs. (Contributed by NM, 23-Jul-1995.) |
| Ref | Expression |
|---|---|
| 2ecoptocl.1 | ⊢ 𝑆 = ((𝐶 × 𝐷) / 𝑅) |
| 2ecoptocl.2 | ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (𝜑 ↔ 𝜓)) |
| 2ecoptocl.3 | ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → (𝜓 ↔ 𝜒)) |
| 2ecoptocl.4 | ⊢ (((𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷) ∧ (𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷)) → 𝜑) |
| Ref | Expression |
|---|---|
| 2ecoptocl | ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → 𝜒) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2ecoptocl.1 | . . 3 ⊢ 𝑆 = ((𝐶 × 𝐷) / 𝑅) | |
| 2 | 2ecoptocl.3 | . . . 4 ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → (𝜓 ↔ 𝜒)) | |
| 3 | 2 | imbi2d 230 | . . 3 ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → ((𝐴 ∈ 𝑆 → 𝜓) ↔ (𝐴 ∈ 𝑆 → 𝜒))) |
| 4 | 2ecoptocl.2 | . . . . . 6 ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 5 | 4 | imbi2d 230 | . . . . 5 ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜑) ↔ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜓))) |
| 6 | 2ecoptocl.4 | . . . . . 6 ⊢ (((𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷) ∧ (𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷)) → 𝜑) | |
| 7 | 6 | ex 115 | . . . . 5 ⊢ ((𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷) → ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜑)) |
| 8 | 1, 5, 7 | ecoptocl 6791 | . . . 4 ⊢ (𝐴 ∈ 𝑆 → ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜓)) |
| 9 | 8 | com12 30 | . . 3 ⊢ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → (𝐴 ∈ 𝑆 → 𝜓)) |
| 10 | 1, 3, 9 | ecoptocl 6791 | . 2 ⊢ (𝐵 ∈ 𝑆 → (𝐴 ∈ 𝑆 → 𝜒)) |
| 11 | 10 | impcom 125 | 1 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → 𝜒) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1397 ∈ wcel 2202 〈cop 3672 × cxp 4723 [cec 6700 / cqs 6701 |
| 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 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-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-cnv 4733 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-ec 6704 df-qs 6708 |
| This theorem is referenced by: 3ecoptocl 6793 ecovcom 6811 ecovicom 6812 addclnq 7595 mulclnq 7596 nqtri3or 7616 ltexnqq 7628 addclnq0 7671 mulclnq0 7672 distrnq0 7679 mulcomnq0 7680 addassnq0 7682 addclsr 7973 mulclsr 7974 mulgt0sr 7998 aptisr 7999 |
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