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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 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-9 2123 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2728 df-ss 3918 df-fn 6495 df-f 6496 df-fo 6498 |
| This theorem is referenced by: foco 6760 foimacnv 6791 resdif 6795 fococnv2 6800 focdmex 7900 fodomfi2 9970 fin1a2lem7 10316 brdom3 10438 1stf1 18115 1stf2 18116 2ndf1 18118 2ndf2 18119 1stfcl 18120 2ndfcl 18121 qtopcld 23657 qtopcmap 23663 elfm3 23894 bcthlem4 25283 uniiccdif 25535 bdayimaon 27661 nosupno 27671 noinfno 27686 bdayfun 27744 noeta2 27757 precsexlem10 28212 precsexlem11 28213 grporn 30596 xppreima 32723 fsuppcurry1 32803 fsuppcurry2 32804 qtophaus 33993 poimirlem26 37843 poimirlem27 37844 ovoliunnfl 37859 voliunnfl 37861 fonex 49108 |
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