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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 6754 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
| 2 | 1 | ffund 6674 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 Fun wfun 6494 –onto→wfo 6498 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-ss 3920 df-fn 6503 df-f 6504 df-fo 6506 |
| This theorem is referenced by: foco 6768 foimacnv 6799 resdif 6803 fococnv2 6808 focdmex 7910 fodomfi2 9982 fin1a2lem7 10328 brdom3 10450 1stf1 18127 1stf2 18128 2ndf1 18130 2ndf2 18131 1stfcl 18132 2ndfcl 18133 qtopcld 23669 qtopcmap 23675 elfm3 23906 bcthlem4 25295 uniiccdif 25547 bdayimaon 27673 nosupno 27683 noinfno 27698 bdayfun 27756 noeta2 27769 precsexlem10 28224 precsexlem11 28225 grporn 30608 xppreima 32734 fsuppcurry1 32813 fsuppcurry2 32814 qtophaus 34013 poimirlem26 37891 poimirlem27 37892 ovoliunnfl 37907 voliunnfl 37909 fonex 49220 |
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