Gives the adjacency indices of the five Platonic solids.
Usage
platonic(a)
Arguments
a
String containing name of one of the five Platonic solids,
viz tetrahedron, cube, octahedron,
dodecahedron, icosahedron
Details
Returns a two column matrix a, the rows of which show the two
vertices of an edge. Because resistance is symmetric, only
edges with a[i,1] are included.
For the dodecahedron and icosahedron, the nodes are numbered as per
Maple's scheme.