The study of such graphs is called graph theory. Engineers need to find planarity in a graph when, for example, they are designing a computer chip without a crossed wire.

The higher-order analogue of a graph, for example, is called a hypergraph, and instead of edges, it has “hyperedges.” These can connect multiple nodes, which means it can represent multi-way ...

But the concept dates back to the 18th century, when Leonhard Euler laid the foundation of graph theory. Euler was a Swiss scientist and engineer whose solution to the Seven Bridges of Königsberg ...

It also has direct and crucial implications for a branch of mathematics known as graph theory. These graphs consist of collections of points, or vertices, that may (or may not) be connected to each ...

Michael Merrill, Dwight Read, A NEW METHOD USING GRAPH AND LATTICE THEORY TO DISCOVER SPATIALLY COHESIVE SETS OF ARTIFACTS AND AREAS OF ORGANIZED ACTIVITY IN ARCHAEOLOGICAL SITES, American Antiquity, ...