A finite-dimensional Lie algebra arising from a Nichols algebra of diagonal type (rank 2)
A finite-dimensional Lie algebra arising from a Nichols algebra of diagonal type (rank 2)
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由对角型尼科尔斯代数(2 阶)产生的有限维李代数
DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
F. Bertone
中科院分区:
文献类型:
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作者:
N. Andruskiewitsch;I. Angiono;F. Bertone
Let $mathcal{B}_{mathfrak{q}}$ be a finite-dimensional Nichols algebra of diagonal type corresponding to a matrix $mathfrak{q} in mathbf{k}^{ heta imes heta}$, where $mathbf{k}$ is an algebraically closed field of characteristic 0. Let $mathcal{L}_{mathfrak{q}}$ be the Lusztig algebra associated to $mathcal{B}_{mathfrak{q}}$, see this http URL We present $mathcal{L}_{mathfrak{q}}$ as an extension (as braided Hopf algebras) of $mathcal{B}_{mathfrak{q}}$ by $mathfrak Z_{mathfrak{q}}$ where $mathfrak Z_{mathfrak{q}}$ is isomorphic to the universal enveloping algebra of a Lie algebra $mathfrak n_{mathfrak{q}}$. We compute the Lie algebra $mathfrak n_{mathfrak{q}}$ when $ heta = 2$.