| Metamath Proof Explorer |
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Related theorems GIF version |
| Description: If the domain of a function is a set, the function is a set. |
| Ref | Expression |
|---|---|
| fex | ⊢ (A ∈ C → (F:A–→B → F ∈ V)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnex 2740 | . 2 ⊢ (A ∈ C → (F Fn A → F ∈ V)) | |
| 2 | ffn 2752 | . 2 ⊢ (F:A–→B → F Fn A) | |
| 3 | 1, 2 | syl5 22 | 1 ⊢ (A ∈ C → (F:A–→B → F ∈ V)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∈ wcel 1092 Vcvv 1348 Fn wfn 2417 –→wf 2418 |
| This theorem is referenced by: elmap 3265 fodom 3613 ruclem5 4889 hosmvalt 5487 hodmvalt 5488 stelt 5671 |
| 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 |