![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > fofn | Structured version Visualization version GIF version |
Description: An onto mapping is a function on its domain. (Contributed by NM, 16-Dec-2008.) |
Ref | Expression |
---|---|
fofn | ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹 Fn 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fof 6565 | . 2 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
2 | 1 | ffnd 6488 | 1 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹 Fn 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 Fn wfn 6319 –onto→wfo 6322 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-in 3888 df-ss 3898 df-f 6328 df-fo 6330 |
This theorem is referenced by: fodmrnu 6573 foun 6608 fo00 6625 foelrni 6702 cbvfo 7023 foeqcnvco 7034 canth 7090 br1steqg 7693 br2ndeqg 7694 1stcof 7701 2ndcof 7702 df1st2 7776 df2nd2 7777 1stconst 7778 2ndconst 7779 fsplit 7795 fsplitOLD 7796 smoiso2 7989 fodomfi 8781 brwdom2 9021 fodomfi2 9471 fpwwe 10057 imasaddfnlem 16793 imasvscafn 16802 imasleval 16806 dmaf 17301 cdaf 17302 imasmnd2 17940 imasgrp2 18206 efgrelexlemb 18868 efgredeu 18870 imasring 19365 znf1o 20243 zzngim 20244 indlcim 20529 1stcfb 22050 upxp 22228 uptx 22230 cnmpt1st 22273 cnmpt2nd 22274 qtoptopon 22309 qtopcld 22318 qtopeu 22321 qtoprest 22322 imastopn 22325 qtophmeo 22422 elfm3 22555 uniiccdif 24182 dirith 26113 grporn 28304 0vfval 28389 foresf1o 30273 2ndimaxp 30409 2ndresdju 30411 xppreima2 30413 1stpreimas 30465 1stpreima 30466 2ndpreima 30467 fsuppcurry1 30487 fsuppcurry2 30488 ffsrn 30491 gsummpt2d 30734 qusker 30969 imaslmod 30973 qtopt1 31188 qtophaus 31189 circcn 31191 cnre2csqima 31264 sigapildsys 31531 carsgclctunlem3 31688 nosupno 33316 nosupbday 33318 noetalem3 33332 bdayfn 33356 fnbigcup 33475 filnetlem4 33842 ovoliunnfl 35099 voliunnfl 35101 volsupnfl 35102 ssnnf1octb 41822 nnfoctbdj 43095 fargshiftfo 43959 |
Copyright terms: Public domain | W3C validator |