Diagrammatic depiction of a function

Let us summarize and consolidate the concept related to functions using an 'egg' diagram:

• \(f\) : the name of the function
• \(f(x)\) : the image of \(x\) under \(f\)
• \(A\) : the domain of \(f\), also denoted by \(D_f\)
• \(B\) : the codomain of \(f\), we do not have a notation for this one.