what does f mean with arrow on top of it?

Question

anonymous · Answer

likely its a vector, but it could be other things

anonymous · Answer

no it has to do with math proofs

anonymous · Answer

is it like inverse function or what?

anonymous · Answer

with an arrow?? hmmm....usually an inverse has a -1 as its exponent...what kind of proofs (what subject/level of math) are you doing?

anonymous · Answer

functions

anonymous · Answer

injections, surjections etc

anonymous · Answer

and there is an arrow to the left and arrow to the right above letter  f

anonymous · Answer

anonymous · Answer

is it image of X or something?

anonymous · Answer