👉 In mathematics, a graph is a collection of points called vertices (nodes) and lines or edges connecting these points. The concept of "graph" is used in various branches of mathematics such as algebra, geometry, topology, and computer science. A graph can be represented using mathematical notation with its nodes labeled by their coordinates and their connectedness determined by the presence or absence of an edge between them. It's often represented using adjacency lists, where each node has a list of all adjacent vertices to it
