On the structure of quantum permutation groups

On the structure of quantum permutation groups
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论量子置换群的结构

DOI:
10.1090/s0002-9939-06-08464-4
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发表时间:
2004
期刊:
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影响因子:
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通讯作者:
S. Moroianu
S. Moroianu
中科院分区:
--
文献类型:
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作者:
T. Banica;S. Moroianu

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集合$X_n=\{1,.,n $对应于Hopf代数A_{aut}(X_n)$。这是一个由生成元和关系构成的代数,已知对于$n\leq 3$同构于$\cc(S_n)$,对于$n\geq 4$是无穷维的。本文给出了与Clifford代数有关的代数A_{aut}(X_n)的一个显式表示.当n=4时,表示在离散量子群意义上是忠实的。
The quantum permutation group of the set $X_n=\{1,..., n\}$ corresponds to the Hopf algebra $A_{aut}(X_n)$. This is an algebra constructed with generators and relations, known to be isomorphic to $\cc (S_n)$ for $n\leq 3$, and to be infinite dimensional for $n\geq 4$. In this paper we find an explicit representation of the algebra $A_{aut}(X_n)$, related to Clifford algebras. For $n=4$ the representation is faithful in the discrete quantum group sense.