👉 Copygraph is a type of graph that contains only one copy of each node. In other words, it's a graph with all nodes having the same number of edges between them. The term "copygraph" comes from the fact that in a copygraph, every edge has exactly one end point and no two endpoints are connected by an edge. This property is often used to simplify graph algorithms and data structures, especially when dealing with graphs with multiple copies of each node.