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三元顶点代数上$\mathfrak{sl}_{2}$作用的一个新证明

A new proof of the $\mathfrak{sl}_{2}$ action on the triplet vertex algebra

Xianzu Lin

摘要:

设$\mathcal {W}(p)$是中心电荷$c_{p}=1-\frac{6(p-1)^{2}}{p}$的三重顶点代数,$p\geq2$ .作为Virasoro模块,我们有$$\mathcal {W}(p)=\bigoplus_{n=0} ^{\infty}(2n+1) L(c_{p}, n^{2}p+np-n).$$在\cite{am1}中指出$\mathcal {W}(p)$允许$\mathfrak{sl}_{2}$的作用。本文给出了$\mathcal {W}(p)$的组合数学描述,由此可十分直接地得出$\mathfrak{sl}_{2}$的作用。最后给出了不变子代数$\mathcal {W}(p)^Γ$的类似刻画,这些刻画对于以后的研究中心荷例外顶点算子代数$1$的刻画是有用的.我们还希望将本文的方法推广到高阶格顶点算子代数的子代数。

英文摘要:

Let $\mathcal {W}(p)$ be the triplet vertex algebra of central charge $c_{p}=1-\frac{6(p-1)^{2}}{p}$, $p\geq2$. As a Virasoro module, we have $$\mathcal {W}(p)=\bigoplus_{n=0} ^{\infty}(2n+1) L(c_{p}, n^{2}p+np-n).$$ It was pointed out in \cite{am1} that $\mathcal {W}(p)$ admits an action of $\mathfrak{sl}_{2}$. In this paper we give a combinatorics description of $\mathcal {W}(p)$, from which the action of $\mathfrak{sl}_{2}$ follows quite directly. In the end of this paper we give similar descriptions of the invariant subalgebra $\mathcal {W}(p)^Γ$, these will be useful for the characterizations of the exceptional vertex operator algebras of central charge $1$ in forthcoming papers. We also hope to extend the method of this paper to subalgebra of lattice vertex operator algebras of higher rank.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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