👉 In mathematics, a generaliser is an operation that takes one object as input and produces another. It can be applied to any set of objects or variables. For example, in calculus, a generaliser might be used to integrate over a region defined by a function on that region.
A generaliser is often denoted with an asterisk (
) to indicate that it operates on multiple inputs at once. For instance, if we want to calculate the area under a curve y = f(x) from