MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  fofun Structured version   Visualization version   GIF version

Theorem fofun 6116
Description: An onto mapping is a function. (Contributed by NM, 29-Mar-2008.)
Assertion
Ref Expression
fofun (𝐹:𝐴onto𝐵 → Fun 𝐹)

Proof of Theorem fofun
StepHypRef Expression
1 fof 6115 . 2 (𝐹:𝐴onto𝐵𝐹:𝐴𝐵)
21ffund 6049 1 (𝐹:𝐴onto𝐵 → Fun 𝐹)
Colors of variables: wff setvar class
Syntax hints:  wi 4  Fun wfun 5882  ontowfo 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
  Copyright terms: Public domain W3C validator