Multivalued function
In
mathematics, a
multivalued function is a
total relation; i.e. every
input is associated with one or more outputs. Strictly speaking, a "well-defined"
function associates one, and only one,
output to any particular
input. The term "multivalued function" is, technically, a
logical contradiction, "
true" functions are monovalued.
The above diagram does not represent a "true" function; because, the element 3, in X, is associated with two elements b and c, in Y.
See also: