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| Mirrors > Home > ILE Home > Th. List > 3ecoptocl | GIF version | ||
| Description: Implicit substitution of classes for equivalence classes of ordered pairs. (Contributed by NM, 9-Aug-1995.) |
| Ref | Expression |
|---|---|
| 3ecoptocl.1 | ⊢ 𝑆 = ((𝐷 × 𝐷) / 𝑅) |
| 3ecoptocl.2 | ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (𝜑 ↔ 𝜓)) |
| 3ecoptocl.3 | ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → (𝜓 ↔ 𝜒)) |
| 3ecoptocl.4 | ⊢ ([〈𝑣, 𝑢〉]𝑅 = 𝐶 → (𝜒 ↔ 𝜃)) |
| 3ecoptocl.5 | ⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐷) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜑) |
| Ref | Expression |
|---|---|
| 3ecoptocl | ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆 ∧ 𝐶 ∈ 𝑆) → 𝜃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3ecoptocl.1 | . . . 4 ⊢ 𝑆 = ((𝐷 × 𝐷) / 𝑅) | |
| 2 | 3ecoptocl.3 | . . . . 5 ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → (𝜓 ↔ 𝜒)) | |
| 3 | 2 | imbi2d 230 | . . . 4 ⊢ ([〈𝑧, 𝑤〉]𝑅 = 𝐵 → ((𝐴 ∈ 𝑆 → 𝜓) ↔ (𝐴 ∈ 𝑆 → 𝜒))) |
| 4 | 3ecoptocl.4 | . . . . 5 ⊢ ([〈𝑣, 𝑢〉]𝑅 = 𝐶 → (𝜒 ↔ 𝜃)) | |
| 5 | 4 | imbi2d 230 | . . . 4 ⊢ ([〈𝑣, 𝑢〉]𝑅 = 𝐶 → ((𝐴 ∈ 𝑆 → 𝜒) ↔ (𝐴 ∈ 𝑆 → 𝜃))) |
| 6 | 3ecoptocl.2 | . . . . . . 7 ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 7 | 6 | imbi2d 230 | . . . . . 6 ⊢ ([〈𝑥, 𝑦〉]𝑅 = 𝐴 → ((((𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜑) ↔ (((𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜓))) |
| 8 | 3ecoptocl.5 | . . . . . . 7 ⊢ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐷) ∧ (𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜑) | |
| 9 | 8 | 3expib 1237 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐷) → (((𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜑)) |
| 10 | 1, 7, 9 | ecoptocl 6896 | . . . . 5 ⊢ (𝐴 ∈ 𝑆 → (((𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → 𝜓)) |
| 11 | 10 | com12 30 | . . . 4 ⊢ (((𝑧 ∈ 𝐷 ∧ 𝑤 ∈ 𝐷) ∧ (𝑣 ∈ 𝐷 ∧ 𝑢 ∈ 𝐷)) → (𝐴 ∈ 𝑆 → 𝜓)) |
| 12 | 1, 3, 5, 11 | 2ecoptocl 6897 | . . 3 ⊢ ((𝐵 ∈ 𝑆 ∧ 𝐶 ∈ 𝑆) → (𝐴 ∈ 𝑆 → 𝜃)) |
| 13 | 12 | com12 30 | . 2 ⊢ (𝐴 ∈ 𝑆 → ((𝐵 ∈ 𝑆 ∧ 𝐶 ∈ 𝑆) → 𝜃)) |
| 14 | 13 | 3impib 1232 | 1 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆 ∧ 𝐶 ∈ 𝑆) → 𝜃) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 〈cop 3712 × cxp 4772 [cec 6805 / cqs 6806 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-br 4131 df-opab 4193 df-xp 4780 df-cnv 4782 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-ec 6809 df-qs 6813 |
| This theorem is used by: ecovass 6918 ecoviass 6919 ecovdi 6920 ecovidi 6921 ltsonq 7765 ltanqg 7767 ltmnqg 7768 lttrsr 8129 ltsosr 8131 ltasrg 8137 mulextsr1 8148 |
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