##  [Incidence Structure](/incidence-structure) 

  ##  [Incidence Structure](https://puremath.quantumdictionary.io/incidence-structure-0) 

  

 [![Pure Mathematics Dictionary](/sites/default/files/styles/large/public/2026-01/Pure%20Mathematics.png.webp?itok=5pZnFQ59)](/topic-specific-dictionaries/mathematics-logic/pure-mathematics)

- Mathematics & Logic -

**Pure Mathematics Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A combinatorial object consisting of two (or more) classes of elements, typically called points and blocks, together with an incidence relation I ⊆ P × B that records which points lie on which blocks; equivalently described by a bipartite graph or incidence matrix.