Minimal affine coordinates for SL(3,C) character varieties of free groups

Minimal affine coordinates for SL(3,C) character varieties of free groups
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自由群 SL(3,C) 特征簇的最小仿射坐标

DOI:
10.1016/j.jalgebra.2008.06.031
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发表时间:
2007
期刊:
影响因子:
0.9
通讯作者:
Sean Lawton
Sean Lawton
中科院分区:
数学3区
文献类型:
--
作者:
Sean Lawton

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设Xr是秩为r的自由群的SL(3,C)表示的模.本文确定了X_r坐标环的极小生成元。这立刻给出了模的显式全局坐标,并确定了模的最小仿射嵌入的维数。沿着的方式,我们利用gl(3,C)中的矩阵的r-元组的模有关的结果。因此,我们还陈述了gl(n,C),sl(n,C)和SL(n,C)中元素的r-元组的模的坐标环之间的一般不变理论对应。
Let Xrbe the moduli of SL(3,C) representations of a rank r free group. In this paper we determine minimal generators of the coordinate ring of Xr. This at once gives explicit global coordinates for the moduli and determines the dimension of the moduli's minimal affine embedding. Along the way, we utilize results concerning the moduli of r-tuples of matrices in gl(3,C). Consequently, we also state general invariant theoretic correspondences between the coordinate rings of the moduli of r-tuples of elements in gl(n,C), sl(n,C), and SL(n,C).