The center function on trees
Fred R. McMorris, Fred S. Roberts, Chi Wang · Networks · 2001
Abstract When (X, d) is a finite metric space and π = (x1, …, xk) ∈ Xk, a central element for π is an element x of X for which max{d (x, xi): i = 1, …, k} is minimum. The function that returns the set of all central elements for any tuple π is called the center function on X. In this article, the center function on finite trees is characterized. © John Wiley & Sons, Inc.