Ishii's conjecture and Bridgeland stability conditions for dihedral reflection groups

We provide a new proof of Ishii’s conjecture for any dihedral reflection group $G\subset G{L}_2(\mathbb{C})$ from the viewpoint of Bridgeland stability conditions. Our strategy is to reduce the problem, via the derived McKay correspondence, to a geometric construction of Bridgeland stability conditions on the root stack of the maximal resolution along the strict transform of the discriminant divisor.