An incidence structure is a set of objects of one type, usually called points, a set of objects of another type, often called lines or blocks, and an incidence relation specifying which objects of the two types are incident. A block design, configuration, and partial geometry are examples of incidence structures.
Incidence Structure
See also
Block Design, Configuration, Incidence Graph, Incidence Matrix, Levi Graph, Partial Geometry, Point GraphExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Incidence Structure." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/IncidenceStructure.html