Multivalued function

A multivalued function is a type of function where more than one output can be obtained for the same input. Usually, when we think of a function, it has a unique output for each input. For example, squaring a number (like 3) always results in 9. But with a multivalued function, a single input (like 3) could have multiple outputs (like 9, -9, and 0). Because the outputs are different depending on the input, these multivalued functions can be a bit tricky to understand.