Heptagonal symmetry

Heptagonal symmetry, also known as heggic symmetry and notated as I2(7), is a 2D spherical Coxeter group. It is the symmetry group of the heptagon, with 7 rotation and 7 reflection elements.

Subgroups

 * I2(7)+ (maximal)
 * A1×I (maximal)
 * I×I

Convex polytopes with H2 symmetry

 * Heptagon (regular)
 * Diheptagon (isogonal)/Heptambus (isotopic)