Complexity Explorer Santa Few Institute

Graphs that can be broken down into two disjoint sets of nodes, where edges may link nodes between two sets but not within a set. For example, imagine a graph of red and blue nodes, in which a red node can be connected to one or more blue nodes (and vice versa) but not nodes of its own color. Often useful for visualizing attributes of a population (e.g., the distribution of ethnic group memberships for individual people in a social network).