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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 8950 | . 2 ⊢ Rel ≈ | |
2 | inss1 4228 | . . 3 ⊢ ( ≼ ∩ ◡ ≼ ) ⊆ ≼ | |
3 | reldom 8951 | . . 3 ⊢ Rel ≼ | |
4 | relss 5781 | . . 3 ⊢ (( ≼ ∩ ◡ ≼ ) ⊆ ≼ → (Rel ≼ → Rel ( ≼ ∩ ◡ ≼ ))) | |
5 | 2, 3, 4 | mp2 9 | . 2 ⊢ Rel ( ≼ ∩ ◡ ≼ ) |
6 | brin 5200 | . . 3 ⊢ (𝑥( ≼ ∩ ◡ ≼ )𝑦 ↔ (𝑥 ≼ 𝑦 ∧ 𝑥◡ ≼ 𝑦)) | |
7 | vex 3477 | . . . . 5 ⊢ 𝑥 ∈ V | |
8 | vex 3477 | . . . . 5 ⊢ 𝑦 ∈ V | |
9 | 7, 8 | brcnv 5882 | . . . 4 ⊢ (𝑥◡ ≼ 𝑦 ↔ 𝑦 ≼ 𝑥) |
10 | 9 | anbi2i 622 | . . 3 ⊢ ((𝑥 ≼ 𝑦 ∧ 𝑥◡ ≼ 𝑦) ↔ (𝑥 ≼ 𝑦 ∧ 𝑦 ≼ 𝑥)) |
11 | sbthb 9100 | . . 3 ⊢ ((𝑥 ≼ 𝑦 ∧ 𝑦 ≼ 𝑥) ↔ 𝑥 ≈ 𝑦) | |
12 | 6, 10, 11 | 3bitrri 298 | . 2 ⊢ (𝑥 ≈ 𝑦 ↔ 𝑥( ≼ ∩ ◡ ≼ )𝑦) |
13 | 1, 5, 12 | eqbrriv 5791 | 1 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1540 ∩ cin 3947 ⊆ wss 3948 class class class wbr 5148 ◡ccnv 5675 Rel wrel 5681 ≈ cen 8942 ≼ cdom 8943 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ral 3061 df-rex 3070 df-rab 3432 df-v 3475 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-br 5149 df-opab 5211 df-id 5574 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-er 8709 df-en 8946 df-dom 8947 |
This theorem is referenced by: dfsdom2 9102 |
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