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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 6115 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
2 | 1 | ffund 6049 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → Fun 𝐹) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 Fun wfun 5882 –onto→wfo 5886 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-in 3581 df-ss 3588 df-fn 5891 df-f 5892 df-fo 5894 |
This theorem is referenced by: foimacnv 6154 resdif 6157 fococnv2 6162 fornex 7135 fodomfi2 8883 fin1a2lem7 9228 brdom3 9350 1stf1 16832 1stf2 16833 2ndf1 16835 2ndf2 16836 1stfcl 16837 2ndfcl 16838 qtopcld 21516 qtopcmap 21522 elfm3 21754 bcthlem4 23124 uniiccdif 23346 grporn 27375 xppreima 29449 qtophaus 29903 bdayimaon 31843 nosupno 31849 bdayfun 31888 poimirlem26 33435 poimirlem27 33436 ovoliunnfl 33451 voliunnfl 33453 |
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