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, Combinatorial 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