Function Image and preïmage Given a function , the image1 of a subset is the set containing all output values for general, whereas the preïmage2 of a subset is the set containing all elements of with an image in . general Properties A stack exchange answer The preïmage of the image and image of the preïmage are not necessarily the identity The image map of a bijection is a bijection tidy | en | sembr Footnotes German Bild ↩ German Urbild ↩