A function f is surjective (or onto) provided f(A)=B; in other words, for each b∈B,b=f(a) for some a∈A. A function f is said to be bijective (or a bijection or a one-to-one correspondence) if it is both injective and surjective.
Pride refuses to die in the shabby peajacketed man explaining his panhandling technique.
Captured images were pseudocolorized using Adobe Photoshop.
He's got a nice heavy coat and he's wearin longies, but nights have been in the twenties everywhere north of the county line since Halloween.
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