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Related theorems GIF version |
| Description: Schroeder-Bernstein Theorem in class form. |
| Ref | Expression |
|---|---|
| sbthcl | ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relen 4378 | . 2 ⊢ Rel ≈ | |
| 2 | reldom 4379 | . . 3 ⊢ Rel ≼ | |
| 3 | relin1 3268 | . . 3 ⊢ (Rel ≼ → Rel ( ≼ ∩ ◡ ≼ )) | |
| 4 | 2, 3 | ax-mp 7 | . 2 ⊢ Rel ( ≼ ∩ ◡ ≼ ) |
| 5 | visset 1816 | . . . 4 ⊢ y ∈ V | |
| 6 | sbthbg 4464 | . . . 4 ⊢ (y ∈ V → ((x ≼ y ⋀ y ≼ x) ↔ x ≈ y)) | |
| 7 | 5, 6 | ax-mp 7 | . . 3 ⊢ ((x ≼ y ⋀ y ≼ x) ↔ x ≈ y) |
| 8 | df-br 2625 | . . . . 5 ⊢ (x ≼ y ↔ 〈x, y〉 ∈ ≼ ) | |
| 9 | df-br 2625 | . . . . . 6 ⊢ (y ≼ x ↔ 〈y, x〉 ∈ ≼ ) | |
| 10 | visset 1816 | . . . . . . 7 ⊢ x ∈ V | |
| 11 | 10, 5 | opelcnv 3304 | . . . . . 6 ⊢ (〈x, y〉 ∈ ◡ ≼ ↔ 〈y, x〉 ∈ ≼ ) |
| 12 | 9, 11 | bitr4 176 | . . . . 5 ⊢ (y ≼ x ↔ 〈x, y〉 ∈ ◡ ≼ ) |
| 13 | 8, 12 | anbi12i 484 | . . . 4 ⊢ ((x ≼ y ⋀ y ≼ x) ↔ (〈x, y〉 ∈ ≼ ⋀ 〈x, y〉 ∈ ◡ ≼ )) |
| 14 | elin 2210 | . . . 4 ⊢ (〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ ) ↔ (〈x, y〉 ∈ ≼ ⋀ 〈x, y〉 ∈ ◡ ≼ )) | |
| 15 | 13, 14 | bitr4 176 | . . 3 ⊢ ((x ≼ y ⋀ y ≼ x) ↔ 〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ )) |
| 16 | df-br 2625 | . . 3 ⊢ (x ≈ y ↔ 〈x, y〉 ∈ ≈ ) | |
| 17 | 7, 15, 16 | 3bitr3r 182 | . 2 ⊢ (〈x, y〉 ∈ ≈ ↔ 〈x, y〉 ∈ ( ≼ ∩ ◡ ≼ )) |
| 18 | 1, 4, 17 | eqrelriv 3257 | 1 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 146 ⋀ wa 223 = wceq 958 ∈ wcel 960 Vcvv 1814 ∩ cin 2049 〈cop 2415 class class class wbr 2624 ◡ccnv 3175 Rel wrel 3181 ≈ cen 4370 ≼ cdom 4371 |
| This theorem is referenced by: dfsdom2 4466 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-rep 2698 ax-sep 2708 ax-pow 2748 ax-pr 2785 ax-un 2872 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-rex 1653 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-uni 2508 df-br 2625 df-opab 2672 df-id 2841 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 df-fun 3198 df-fn 3199 df-f 3200 df-f1 3201 df-fo 3202 df-f1o 3203 df-er 4267 df-en 4374 df-dom 4375 |