halffunction

A halffunction is a term used in some areas of mathematics and computer science to describe a function where either the domain or the codomain is restricted. For example, a function from the set of real numbers to the set of real numbers might be considered a halffunction if its domain is restricted to only positive real numbers. Alternatively, a function could be considered a halffunction if its codomain is a subset of the real numbers, even if its domain is the entire set of real numbers. The precise definition and usage of "halffunction" can vary depending on the specific context and the author's convention. It is not a universally standardized term and may appear in specialized literature or discussions rather than general mathematical texts. The concept is often employed to analyze specific properties or behaviors of functions within a limited scope. In some programming contexts, a function that only partially fulfills its intended purpose or operates on a restricted subset of its potential inputs could be informally referred to as a halffunction.