Created by Karl Marx. Marxism is not Communism, its what communism based its ideas on. Communism was starlins dream for russia, Karl Marx, lived in the early 1800's and did write the communist manifesto, for the communist party,that was 1848, based on his marxist ideas along time before starlin.
In mathematics, we call a visual representation of a network a graph. A graph is a collection of points, called vertices, and line segments connecting those points, called edges. The number of edges that belong to a vertex is called the degree of the vertex.
Typically, a graph is depicted in diagrammatic form as a set of dots for the vertices, joined by lines or curves for the edges. Graphs are one of the objects of study in discrete mathematics. The edges may be directed or undirected. For example, if the vertices represent people at a party, and there is an edge between two people if they shake hands, then this is an undirected graph, because if person A shook hands with person B, then person B also shook hands with person A.