nondegenerate face
1Digon — A degenerate digon with two coinciding edges sharing the same vertices Edges and vertices 2 Schläfli symbol {2} …
2Nerve (category theory) — In category theory, the nerve N(C) of a small category C is a simplicial set constructed from the objects and morphisms of C. The geometric realization of this simplicial set is a topological space, called the classifying space of the category C …
3Dihedron — Set of regular n gonal dihedrons Example hexagonal dihedron on a sphere Type Regular polyhedron or spherical tiling Faces 2 n gons Edges n Vertices …
