ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  fofun GIF version

Theorem fofun 5341
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 5340 . 2 (𝐹:𝐴onto𝐵𝐹:𝐴𝐵)
2 ffun 5270 . 2 (𝐹:𝐴𝐵 → Fun 𝐹)
31, 2syl 14 1 (𝐹:𝐴onto𝐵 → Fun 𝐹)
Colors of variables: wff set class
Syntax hints:  wi 4  Fun wfun 5112  wf 5114  ontowfo 5116
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-11 1484  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119
This theorem depends on definitions:  df-bi 116  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-in 3072  df-ss 3079  df-fn 5121  df-f 5122  df-fo 5124
This theorem is referenced by:  foimacnv  5378  resdif  5382  fococnv2  5386  fornex  6006  ctssdccl  6989  suplocexprlem2b  7515  suplocexprlemmu  7519  suplocexprlemdisj  7521  suplocexprlemloc  7522  suplocexprlemub  7524  suplocexprlemlub  7525  ennnfonelemex  11916  ctinf  11932
  Copyright terms: Public domain W3C validator