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| Mirrors > Home > MPE Home > Th. List > 2ecoptocl | Structured version Visualization version 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 342 | . . 3 ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → ((𝐴 ∈ 𝑆 → 𝜓) ↔ (𝐴 ∈ 𝑆 → 𝜒))) |
| 4 | 2ecoptocl.2 | . . . . . 6 ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 5 | 4 | imbi2d 342 | . . . . 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 416 | . . . . 5 ⊢ ((𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷) → ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜑)) |
| 8 | 1, 5, 7 | ecoptocl 8784 | . . . 4 ⊢ (𝐴 ∈ 𝑆 → ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → 𝜓)) |
| 9 | 8 | com12 32 | . . 3 ⊢ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝐷) → (𝐴 ∈ 𝑆 → 𝜓)) |
| 10 | 1, 3, 9 | ecoptocl 8784 | . 2 ⊢ (𝐵 ∈ 𝑆 → (𝐴 ∈ 𝑆 → 𝜒)) |
| 11 | 10 | impcom 411 | 1 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆) → 𝜒) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1559 ∈ wcel 2141 〈cop 4587 × cxp 5643 [cec 8671 / cqs 8672 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4480 df-sn 4582 df-pr 4584 df-op 4588 df-br 5100 df-opab 5162 df-xp 5651 df-cnv 5653 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-ec 8675 df-qs 8679 |
| This theorem is referenced by: 3ecoptocl 8786 ecovcom 8800 addclsr 11038 mulclsr 11039 ltsosr 11049 mulgt0sr 11060 |
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