On the conjecture of Athanasiadis related to freeness of a family of hyparplane arrangements
classification
🧮 math.CO
math.AC
keywords
arrangementsathanasiadisdirectionfamilyfreenessprovealreadyarrangement
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We prove a characterization of freeness, conjectured by Athanasiadis, for the family of hyperplane arrangements which lie between the Coxeter and the Catalan arrangement of type $A_\ell$. One direction was already proved in [2]. Here we prove the other direction
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