Inductive Freeness of Ziegler's Canonical Multiderivations

Torsten Hoge, Gerhard Roehrle

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