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| Mirrors > Home > MPE Home > Th. List > sbthcl | Structured version Visualization version GIF version | ||
| Description: Schroeder-Bernstein Theorem in class form. (Contributed by NM, 28-Mar-1998.) |
| Ref | Expression |
|---|---|
| sbthcl | ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relen 8900 | . 2 ⊢ Rel ≈ | |
| 2 | inss1 4196 | . . 3 ⊢ ( ≼ ∩ ◡ ≼ ) ⊆ ≼ | |
| 3 | reldom 8901 | . . 3 ⊢ Rel ≼ | |
| 4 | relss 5736 | . . 3 ⊢ (( ≼ ∩ ◡ ≼ ) ⊆ ≼ → (Rel ≼ → Rel ( ≼ ∩ ◡ ≼ ))) | |
| 5 | 2, 3, 4 | mp2 9 | . 2 ⊢ Rel ( ≼ ∩ ◡ ≼ ) |
| 6 | brin 5154 | . . 3 ⊢ (𝑥( ≼ ∩ ◡ ≼ )𝑦 ↔ (𝑥 ≼ 𝑦 ∧ 𝑥◡ ≼ 𝑦)) | |
| 7 | vex 3448 | . . . . 5 ⊢ 𝑥 ∈ V | |
| 8 | vex 3448 | . . . . 5 ⊢ 𝑦 ∈ V | |
| 9 | 7, 8 | brcnv 5836 | . . . 4 ⊢ (𝑥◡ ≼ 𝑦 ↔ 𝑦 ≼ 𝑥) |
| 10 | 9 | anbi2i 623 | . . 3 ⊢ ((𝑥 ≼ 𝑦 ∧ 𝑥◡ ≼ 𝑦) ↔ (𝑥 ≼ 𝑦 ∧ 𝑦 ≼ 𝑥)) |
| 11 | sbthb 9039 | . . 3 ⊢ ((𝑥 ≼ 𝑦 ∧ 𝑦 ≼ 𝑥) ↔ 𝑥 ≈ 𝑦) | |
| 12 | 6, 10, 11 | 3bitrri 298 | . 2 ⊢ (𝑥 ≈ 𝑦 ↔ 𝑥( ≼ ∩ ◡ ≼ )𝑦) |
| 13 | 1, 5, 12 | eqbrriv 5745 | 1 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1540 ∩ cin 3910 ⊆ wss 3911 class class class wbr 5102 ◡ccnv 5630 Rel wrel 5636 ≈ cen 8892 ≼ cdom 8893 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3403 df-v 3446 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5103 df-opab 5165 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-er 8648 df-en 8896 df-dom 8897 |
| This theorem is referenced by: dfsdom2 9041 |
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