multifunctions

A multifunction, also known as a set-valued function, assigns each input to a set of possible outputs rather than a single outcome. Think of it as a rule where, for a given input, there might be multiple valid results instead of just one. For example, if the input is a person’s name, the multifunction could return all the jobs that person has held. It’s useful in scenarios where choices or options are not limited to one result, allowing for a broader, more flexible representation of relationships and possibilities.