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Related theorems GIF version |
| Description: Implicit substitution of classes for ordered pairs. |
| Ref | Expression |
|---|---|
| 2optocl.1 | ⊢ R = (C × D) |
| 2optocl.2 | ⊢ (〈x, y〉 = A → (φ ↔ ψ)) |
| 2optocl.3 | ⊢ (〈z, w〉 = B → (ψ ↔ χ)) |
| 2optocl.4 | ⊢ (((x ∈ C ∧ y ∈ D) ∧ (z ∈ C ∧ w ∈ D)) → φ) |
| Ref | Expression |
|---|---|
| 2optocl | ⊢ ((A ∈ R ∧ B ∈ R) → χ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2optocl.1 | . . . 4 ⊢ R = (C × D) | |
| 2 | 2optocl.3 | . . . . 5 ⊢ (〈z, w〉 = B → (ψ ↔ χ)) | |
| 3 | 2 | imbi2d 464 | . . . 4 ⊢ (〈z, w〉 = B → ((A ∈ R → ψ) ↔ (A ∈ R → χ))) |
| 4 | 2optocl.2 | . . . . . . 7 ⊢ (〈x, y〉 = A → (φ ↔ ψ)) | |
| 5 | 4 | imbi2d 464 | . . . . . 6 ⊢ (〈x, y〉 = A → (((z ∈ C ∧ w ∈ D) → φ) ↔ ((z ∈ C ∧ w ∈ D) → ψ))) |
| 6 | 2optocl.4 | . . . . . . 7 ⊢ (((x ∈ C ∧ y ∈ D) ∧ (z ∈ C ∧ w ∈ D)) → φ) | |
| 7 | 6 | exp 291 | . . . . . 6 ⊢ ((x ∈ C ∧ y ∈ D) → ((z ∈ C ∧ w ∈ D) → φ)) |
| 8 | 1, 5, 7 | optocl 2469 | . . . . 5 ⊢ (A ∈ R → ((z ∈ C ∧ w ∈ D) → ψ)) |
| 9 | 8 | com12 13 | . . . 4 ⊢ ((z ∈ C ∧ w ∈ D) → (A ∈ R → ψ)) |
| 10 | 1, 3, 9 | optocl 2469 | . . 3 ⊢ (B ∈ R → (A ∈ R → χ)) |
| 11 | 10 | com12 13 | . 2 ⊢ (A ∈ R → (B ∈ R → χ)) |
| 12 | 11 | imp 277 | 1 ⊢ ((A ∈ R ∧ B ∈ R) → χ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 ∧ wa 196 = wceq 1091 ∈ wcel 1092 〈cop 1810 × cxp 2408 |
| This theorem is referenced by: 3optocl 2471 ecopoprsym 3246 th3qlem2 3251 axaddcl 4066 axmulcl 4068 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-opab 2098 df-xp 2424 |