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arXiv 2212.04558math.GTmath.QA
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三流形在单位根处的skein代数

Skein Algebras of Three-Manifolds at 4th Roots of Unity

Charles Frohman, Joanna Kania-Bartoszynska, Thang Le

AI总结:

本文在任意3-流形的skein模中引入代数结构,证明当参数为±i且H_1(M;Z)无2-挠时该代数与参数为±1时同构,并揭示其为PSL_2(C)-特征簇的非简化坐标环。

摘要:

本文在任意3-流形M的skein模中,由在H_1(M;Z_2)中表示0的链环所张成的部分上引入了一种代数结构,此时Kauffman括号skein关系中使用的参数值等于±i。证明了若M的H_1(M;Z)无2-挠,则这些代数K_{±i}^0(M)与参数值为±1时的相应代数自然同构。这表明代数K_{±i}^0(M)是π_1(M)的提升至SL_2(C)-表示的PSL_2(C)-特征簇的非简化坐标环。

英文摘要:

This paper introduces an algebra structure on the part of the skein module of an arbitrary $3$-manifold $M$ spanned by links that represent $0$ in $H_1(M;\mathbb{Z}_2)$ when the value of the parameter used in the Kauffman bracket skein relation is equal to $\pm {\bf i}$. It is proved that if $M$ has no $2$-torsion in $H_1(M;\mathbb{Z})$ then those algebras, $K_{\pm {\bf i}}^0(M)$, are naturally isomorphic to the corresponding algebras when the value of the parameter is $\pm 1$. This implies that the algebra $K_{\pm{\bf i}}^0(M)$ is the unreduced coordinate ring of the variety of $PSL_2(\mathbb{C})$-characters of $π_1(M)$ that lift to $SL_2(\mathbb{C})$-representations.

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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