Existence of other dihedral dual reflection groups
Determine whether there exists any integer n, with n ≠ 4, such that the dihedral group D_{2n} (of order 2n) coacts homogeneously and inner faithfully as a dual reflection group on a noetherian Artin–Schelter regular domain A generated in degree 1, with the identity component A_e also Artin–Schelter regular. Equivalently, classify all n for which D_{2n} can act as a dual reflection group beyond the known case D_8.
References
We do not know another n with D_{2n} a dual reflection group, and hence the class of dual reflection groups appears to be different from the class of reflection groups.
— Some Artin-Schelter Regular Algebras From Dual Reflection Groups and their Geometry
(2410.08959 - Goetz et al., 11 Oct 2024) in Example 2.5, Section 2.1