👉 In mathematics, "extrametropolitan" refers to a larger set of numbers or elements that are not part of any standard mathematical hierarchy. It is often used in the context of computer science and data structures to describe large sets of elements that can be represented as lists with an extra element at the front. For example, consider a list of integers [1, 2, 3] that represents the numbers 1, 2, and 3. This list is considered extramet
