👉 In mathematics, a top-gallant function is a special kind of function that can be defined as follows: Let f(x) = g(x) + h(x), where g and h are two functions. The term "top-gallant" refers to the fact that this equation has exactly one solution for all x in its domain, i.e., it defines a unique value of y such that f(y) = 0. In other words, the function is top-gallant