| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: The domain of a one-to-one function is dominated by its range. |
| Ref | Expression |
|---|---|
| f1oen.1 | ⊢ A ∈ V |
| Ref | Expression |
|---|---|
| f1dom | ⊢ (F:A–1-1→B → A ≼ B) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1oen.1 | . 2 ⊢ A ∈ V | |
| 2 | f1domg 3299 | . 2 ⊢ (A ∈ V → (F:A–1-1→B → A ≼ B)) | |
| 3 | 1, 2 | ax-mp 6 | 1 ⊢ (F:A–1-1→B → A ≼ B) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∈ wcel 1092 Vcvv 1348 class class class wbr 2054 –1-1→wf1 2419 ≼ cdom 3272 |
| This theorem is referenced by: domtr 3320 |
| 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-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 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-en 3274 df-dom 3275 |