| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > brdom | Structured version Visualization version GIF version | ||
| Description: Dominance relation. (Contributed by NM, 15-Jun-1998.) |
| Ref | Expression |
|---|---|
| bren.1 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| brdom | ⊢ (𝐴 ≼ 𝐵 ↔ ∃𝑓 𝑓:𝐴–1-1→𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bren.1 | . 2 ⊢ 𝐵 ∈ V | |
| 2 | brdomg 8967 | . 2 ⊢ (𝐵 ∈ V → (𝐴 ≼ 𝐵 ↔ ∃𝑓 𝑓:𝐴–1-1→𝐵)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ≼ 𝐵 ↔ ∃𝑓 𝑓:𝐴–1-1→𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∃wex 1812 ∈ wcel 2145 Vcvv 3450 class class class wbr 5103 –1-1→wf1 6530 ≼ cdom 8953 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-pr 5398 ax-un 7737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-xp 5661 df-rel 5662 df-cnv 5663 df-dm 5665 df-rn 5666 df-fn 6536 df-f 6537 df-f1 6538 df-dom 8957 |
| This theorem is used by: domen 8970 domtr 9016 sbthlem10 9097 sbthfilem 9195 ac10ct 10040 domtriomlem 10447 2ndcdisj 23685 birthdaylem3 27193 oldfib 28645 |
| Copyright terms: Public domain | W3C validator |