👉 In mathematics, a "galerus" is a function that has its domain and codomain as two sets of numbers. The set of all real numbers (or any other finite set) can be considered as the domain for this type of function. This means that the set of all real numbers which are not in the range of the function, or the set of all real numbers that are in the range but not in the codomain, will also be a subset of the codomain. The
