👉 In mathematics, a "rightless function" or "rightless map" is a function or mapping that maps every element of its domain to a unique element of its codomain. This means that every point in the codomain can be reached from any given point in the domain by simply applying the function. For example, consider the function f: R → R defined by f(x) = 3x + 2 for all x ∈ R. This function is rightless because it maps every