A choice function (selector, selection) is a mathematical function f that is defined on some collection X of nonempty sets and assigns to each set S in that collection some element f(S) of S. In other words, f is a choice function for X if and only if it belongs to the direct product of X.
Read more about Choice Function: An Example, History and Importance, Refinement of The Notion of Choice Function
Famous quotes containing the words choice and/or function:
“I think there is choice possible at any moment to us, as long as we live. But there is no sacrifice. There is a choice, and the rest falls away. Second choice does not exist. Beware of those who talk about sacrifice.”
—Muriel Rukeyser (1913–1980)
“No one, however powerful and successful, can function as an adult if his parents are not satisfied with him.”
—Frank Pittman (20th century)