A graph face is a connected region of the complement of a graph embedding in a surface. For a planar graph embedding, the graph faces are the regions into which the embedding divides the plane, including the unbounded exterior face.
Graph Face
See also
Cellular Embedding, Face, Graph Edge, Graph Embedding, Graph Vertex, Planar Graph Embedding, SurfaceExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Graph Face." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/GraphFace.html