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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 6794 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
| 2 | 1 | ffund 6712 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 Fun wfun 6532 –onto→wfo 6536 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-cleq 2755 df-ss 3923 df-fn 6541 df-f 6542 df-fo 6544 |
| This theorem is referenced by: foco 6808 foimacnv 6840 resdif 6844 fococnv2 6849 focdmex 7954 fodomfi2 10045 fin1a2lem7 10391 brdom3 10513 1stf1 18249 1stf2 18250 2ndf1 18252 2ndf2 18253 1stfcl 18254 2ndfcl 18255 qtopcld 23851 qtopcmap 23857 elfm3 24088 bcthlem4 25467 uniiccdif 25718 bdayimaon 27835 nosupno 27845 noinfno 27860 bdayfun 27918 noeta2 27932 precsexlem10 28387 precsexlem11 28388 grporn 30851 xppreima 32968 fsuppcurry1 33047 fsuppcurry2 33048 qtophaus 34204 onvfowev 35578 poimirlem26 38275 poimirlem27 38276 ovoliunnfl 38291 voliunnfl 38293 fonex 49622 |
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