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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 6774 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
| 2 | 1 | ffund 6692 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 Fun wfun 6511 –onto→wfo 6515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1799 df-cleq 2753 df-ss 3921 df-fn 6520 df-f 6521 df-fo 6523 |
| This theorem is referenced by: foco 6788 foimacnv 6820 resdif 6824 fococnv2 6829 focdmex 7933 fodomfi2 10013 fin1a2lem7 10360 brdom3 10482 1stf1 18207 1stf2 18208 2ndf1 18210 2ndf2 18211 1stfcl 18212 2ndfcl 18213 qtopcld 23753 qtopcmap 23759 elfm3 23990 bcthlem4 25369 uniiccdif 25620 bdayimaon 27734 nosupno 27744 noinfno 27759 bdayfun 27817 noeta2 27831 precsexlem10 28286 precsexlem11 28287 grporn 30670 xppreima 32797 fsuppcurry1 32876 fsuppcurry2 32877 qtophaus 34094 onvfowev 35423 poimirlem26 38109 poimirlem27 38110 ovoliunnfl 38125 voliunnfl 38127 fonex 49452 |
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