Rooted planar map
= Rooted planar map
A rooted planar map is a <planar map> with a distinguished oriented edge called its root edge. Its tail is the root vertex, and the face on a chosen side of the edge may be designated as the root face.
= Rooted planar map
A rooted planar map is a <planar map> with a distinguished oriented edge called its root edge. Its tail is the root vertex, and the face on a chosen side of the edge may be designated as the root face.