Assertion: polyhedron's face | /r/HasProperty | incident
Facets:
value: namely
type: DEGREE
Source sentences:
text: Mention the additional restrictions necessary to ensure that the abstract polyhedron is a manifold (namely that each face is incident to a simple cycle of vertices and edges, and each vertex is incident to a simple cycle of faces and edges) and state that with these restrictions abstract polyhedra carry exactly the same information as topological polyhedra.