Propentagonal antiprismatic symmetry

Propentagonal antiprismatic symmetry, also known as propappic symmetry and notated as (I2(10)+×A1)/2, is a 3D spherical symmetry group. It is the symmetry of the pentagonal antiprism if the bases are considered to have chiral rather than full triangular symmetry.

Subgroups

 * H2+×I (maximal)
 * ±(I×I×I) (maximal)
 * I×I×I

Convex polytopes with (G2+×A1)/2 symmetry

 * Pentagonal antiprism (isogonal)/Pentagonal antitegum (isotopic)