Polyhedral complex


In mathematics, a polyhedral complex is a set of polyhedra in a real vector space that fit together in a specific way. Polyhedral complexes generalize simplicial complexes and arise in various areas of polyhedral geometry, such as tropical geometry, splines and hyperplane arrangements.

Definition

A polyhedral complex is a set of polyhedra that satisfies the following conditions:
Note that the empty set is a face of every polyhedron, and so the intersection of two polyhedra in may be empty.

Examples

A fan is a polyhedral complex in which every polyhedron is a cone from the origin. Examples of fans include: