Inductive Freeness of Ziegler's Canonical Multiderivations for Restrictions of Reflection Arrangements

Torsten Hoge, Gerhard Roehrle, Sven Wiesner

Let $\mathcal{A}$ be a free hyperplane arrangement. In 1989, Ziegler showed that the restriction $\mathcal{A}"$ of $\mathcal{A}$ to any hyperplane endowed with the natural multiplicit…