Nichols algebras over classical Weyl groups (II)
英文摘要：
It is shown that except in three cases conjugacy classes of classical Weyl groups $W(B_{n})$ and $W(D_{n})$ are of type ${\rm D}$. This proves that Nichols algebras of irreducible Yetter-Drinfeld modules over the classical Weyl groups $\mathbb W_{n}$ (i.e. $H_{n}\rtimes \mathbb{S}_{n}$) are infinite dimensional, except the class of type $(2, 3),(1^{2}, 3)$ in $\mathbb S_{5}$, and $(1^{n-2}, 2)$ in $\mathbb S_{n}$ for $n >5$.
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