👉 The "lca" in mathematics is a concept used to describe the least common ancestor of two or more sets. It's like finding the smallest parent that all members have in common, which is also called the "root" of a tree. For example, consider the following sets: - Set A: {1, 2, 3} - Set B: {a, b, c} - Set C: {d, e} The least common ancestor (lca) between