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Related theorems GIF version |
| Description: Schroeder-Bernstein Theorem in class form. |
| Ref | Expression |
|---|---|
| sbthcl | ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relen 3277 | . 2 ⊢ Rel ≈ | |
| 2 | reldom 3278 | . . 3 ⊢ Rel ≼ | |
| 3 | relin 2491 | . . 3 ⊢ (Rel ≼ → Rel ( ≼ ∩ ◡ ≼ )) | |
| 4 | 2, 3 | ax-mp 6 | . 2 ⊢ Rel ( ≼ ∩ ◡ ≼ ) |
| 5 | visset 1350 | . . . 4 ⊢ y ∈ V | |
| 6 | sbthbg 3360 | . . . 4 ⊢ (y ∈ V → ((x ≼ y ∧ y ≼ x) ↔ x ≈ y)) | |
| 7 | 5, 6 | ax-mp 6 | . . 3 ⊢ ((x ≼ y ∧ y ≼ x) ↔ x ≈ y) |
| 8 | df-br 2063 | . . . . 5 ⊢ (x ≼ y ↔ 〈x, y〉 ∈ ≼ ) | |
| 9 | df-br 2063 | . . . . . 6 ⊢ (y ≼ x ↔ 〈y, x〉 ∈ ≼ ) | |
| 10 | visset 1350 | . . . . . . 7 ⊢ x ∈ V | |
| 11 | 10, 5 | opelcnv 2518 | . . . . . 6 ⊢ (〈x, y〉 ∈ ◡ ≼ ↔ 〈y, x〉 ∈ ≼ ) |
| 12 | 9, 11 | bitr4 154 | . . . . 5 ⊢ (y ≼ x ↔ 〈x, y〉 ∈ ◡ ≼ ) |
| 13 | 8, 12 | anbi12i 369 | . . . 4 ⊢ ((x ≼ y ∧ y ≼ x) ↔ (〈x, y〉 ∈ ≼ ∧ 〈x, y〉 ∈ ◡ ≼ )) |
| 14 | elin 1635 | . . . 4 ⊢ (〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ ) ↔ (〈x, y〉 ∈ ≼ ∧ 〈x, y〉 ∈ ◡ ≼ )) | |
| 15 | 13, 14 | bitr4 154 | . . 3 ⊢ ((x ≼ y ∧ y ≼ x) ↔ 〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ )) |
| 16 | df-br 2063 | . . 3 ⊢ (x ≈ y ↔ 〈x, y〉 ∈ ≈ ) | |
| 17 | 7, 15, 16 | 3bitr3r 157 | . 2 ⊢ (〈x, y〉 ∈ ≈ ↔ 〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ )) |
| 18 | 1, 4, 17 | cleqreli 2484 | 1 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 127 ∧ wa 196 = wceq 1091 ∈ wcel 1092 Vcvv 1348 ∩ cin 1486 〈cop 1810 class class class wbr 2054 ◡ccnv 2409 Rel wrel 2415 ≈ cen 3271 ≼ cdom 3272 |
| This theorem is referenced by: dfsdom2 3362 |
| 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-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 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-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-f1 2435 df-fo 2436 df-f1o 2437 df-er 3200 df-en 3274 df-dom 3275 |