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| Mirrors > Home > MPE Home > Th. List > fofun | Structured version Visualization version GIF version | ||
| Description: An onto mapping is a function. (Contributed by NM, 29-Mar-2008.) |
| Ref | Expression |
|---|---|
| fofun | ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fof 6746 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
| 2 | 1 | ffund 6666 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 Fun wfun 6486 –onto→wfo 6490 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-9 2129 ax-ext 2712 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-ex 1787 df-cleq 2732 df-ss 3907 df-fn 6495 df-f 6496 df-fo 6498 |
| This theorem is referenced by: foco 6760 foimacnv 6791 resdif 6795 fococnv2 6800 focdmex 7905 fodomfi2 9980 fin1a2lem7 10326 brdom3 10448 1stf1 18156 1stf2 18157 2ndf1 18159 2ndf2 18160 1stfcl 18161 2ndfcl 18162 qtopcld 23703 qtopcmap 23709 elfm3 23940 bcthlem4 25319 uniiccdif 25570 bdayimaon 27682 nosupno 27692 noinfno 27707 bdayfun 27765 noeta2 27778 precsexlem10 28233 precsexlem11 28234 grporn 30617 xppreima 32744 fsuppcurry1 32823 fsuppcurry2 32824 qtophaus 34027 poimirlem26 38020 poimirlem27 38021 ovoliunnfl 38036 voliunnfl 38038 fonex 49364 |
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