Prodigonal prismatic symmetry

A1×A1+×A1, also known as espic symmetry or prodigonal prismatic symmetry, is a 3D spherical Coxeter group. It is the symmetry group of the parallelogramic prism and has both central inversion symmetry and mirror symmetry. It can be thought of as the digonal member of the infinite family of prismatic symmetries based on the chiral polygonal symmerties.

Subgroups

 * A1×A1+×I
 * A1×I×I
 * I×I×I