Abstract
Extending earlier work by Sommers and Tymoczko, in 2016, Abe, Barakat, Cuntz, Hoge, and Terao established that each arrangement of ideal type [Formula: see text] stemming from an ideal [Formula: see text] in the set of positive roots of a reduced root system is free.Recently, Röhrle showed that a large class of the [Formula: see text] satisfy the stronger property of inductive freeness and conjectured that this property holds for all [Formula: see text]. In this paper, we confirm this conjecture.
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