“…In many branches of mathematical analysis, having a metric structure is essential for the study of several problems. For instance, the concept of distance between elements of an abstract set allows us to define many topological properties, such as convergence, Cauchy sequences, continuity and others [1][2][3][4]. One of the important properties of a (standard) distance function D on an abstract set M is the triangle inequality, i.e., D(u, v) ≤ D(u, w) + D(w, v) for all u, v.w ∈ M.…”