The 1-skeleton of a p-q duopyramid represents edges of each p and q polygon and pq complete bipartite graph between them.
A p-q duopyramid can be seen as two regular planar polygons of p and q sides with the same center and orthogonal orientations in 4 dimensions.
The p and q sided polygons are hollow, passing through the polytope center and not defining faces.
It can be understood by analogy to the relation of the 3D prisms and their dual bipyramids with Schläfli symbol { } + {p}, and a rhombus in 2D as { } + { }.
The coordinates of a p-q duopyramid (on a unit 3-sphere) can be given as: All pairs of vertices are connected by edges.