User:Tomruen/Regular product polytopes

Regular product forms exist as honeycombs on a 3-sphere: {p,2,q}, with dihedral cells and hosohedral vertex figures. They are related to the 4D duoprisms where the square faces are flattened into rectangles and degenerated into digons.
 * Duo-forms


 * {2,p,2} = {2,2,p}

Regular di-4-topes (2 facets) include: {3,3,2}, {3,4,2}, {4,3,2}, {5,3,2}, {3,5,2}, and their hoso-4-tope duals (2 vertices): {2,3,3}, {2,4,3}, {2,3,4}, {2,3,5}, {2,5,3}.
 * Ditopes and hosotopes