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Related theorems GIF version |
| Description: Implicit substitution of class for equivalence class of ordered pair. |
| Ref | Expression |
|---|---|
| ecoptocl.1 | ⊢ S = ((B × C) / R) |
| ecoptocl.2 | ⊢ ([〈x, y〉]R = A → (φ ↔ ψ)) |
| ecoptocl.3 | ⊢ ((x ∈ B ∧ y ∈ C) → φ) |
| Ref | Expression |
|---|---|
| ecoptocl | ⊢ (A ∈ S → &ps$;) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ecoptocl.1 | . . 3 ⊢ S = ((B × C) / R) | |
| 2 | 1 | eleq2i 1153 | . 2 ⊢ (A ∈ S ↔ A ∈ ((B × C) / R)) |
| 3 | elqsi 3228 | . . 3 ⊢ (A ∈ ((B × C) / R) → ∃z(z ∈ (B × C) ∧ A = [z]R)) | |
| 4 | cleqid 1102 | . . . . . 6 ⊢ (B × C) = (B × C) | |
| 5 | eceq2 3215 | . . . . . . . 8 ⊢ (〈x, y〉 = z → [〈x, y〉]R = [z]R) | |
| 6 | 5 | cleq2d 1112 | . . . . . . 7 ⊢ (〈x, y〉 = z → (A = [〈x, y〉]R ↔ A = [z]R)) |
| 7 | 6 | imbi1d 465 | . . . . . 6 ⊢ (〈x, y〉 = z → ((A = [〈x, y〉]R → ψ) ↔ (A = [z]R → ψ))) |
| 8 | ecoptocl.2 | . . . . . . . . 9 ⊢ ([〈x, y〉]R = A → (φ ↔ ψ)) | |
| 9 | 8 | cleqcoms 1104 | . . . . . . . 8 ⊢ (A = [〈x, y〉]R → (φ ↔ ψ)) |
| 10 | ecoptocl.3 | . . . . . . . 8 ⊢ ((x ∈ B ∧ y ∈ C) → φ) | |
| 11 | 9, 10 | syl5bi 183 | . . . . . . 7 ⊢ (A = [〈x, y〉]R → ((x ∈ B ∧ y ∈ C) → ψ)) |
| 12 | 11 | com12 13 | . . . . . 6 ⊢ ((x ∈ B ∧ y ∈ C) → (A = [〈x, y〉]R → ψ)) |
| 13 | 4, 7, 12 | optocl 2469 | . . . . 5 ⊢ (z ∈ (B × C) → (A = [z]R → ψ)) |
| 14 | 13 | imp 277 | . . . 4 ⊢ ((z ∈ (B × C) ∧ A = [z]R) → ψ) |
| 15 | 14 | 19.23aiv 952 | . . 3 ⊢ (∃z(z ∈ (B × C) ∧ A = [z]R) → ψ) |
| 16 | 3, 15 | syl 12 | . 2 ⊢ (A ∈ ((B × C) / R) → ψ) |
| 17 | 2, 16 | sylbi 174 | 1 ⊢ (A ∈ S → ψ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 ∧ wa 196 ∃wex 678 = wceq 1091 ∈ wcel 1092 〈cop 1810 × cxp 2408 [cec 3198 / cqs 3199 |
| This theorem is referenced by: 2ecoptocl 3240 3ecoptocl 3241 mulidpq 3863 recmulpq 3864 halfpq 3876 0idsr 4000 1idsr 4001 00sr 4002 recexsrlem 4006 map2psrpr 4014 |
| 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-rex 1206 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-br 2063 df-opab 2098 df-xp 2424 df-cnv 2426 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-ec 3202 df-qs 3205 |