B(3)表示的有理性与稠密族
Rationality and dense families of B(3) representations
摘要:
模群的n维半单表示簇的每一个不可约分支都有一个包含在一个来自一个固定模群Q的表示的有理商簇的一个标准映射的像中的Zebriki稠密子集。作为应用,我们证明了三弦辫群B(3)的6维表示存在唯一的分支,能够检测辫反转。进一步,我们给出了在< 12的所有维数下的单B(3)-表示稠密族的显式有理参数化。
英文摘要:
Every irreducible component of the variety of semi-simple n-dimensional representations of the modular group has a Zariski dense subset contained in the image of an etale map from a rational quotient variety of representations of a fixed quiver Q. As an application we prove that there is a unique component of 6-dimensional representations of the three string braid group B(3) able to detect braid-reversion. Further, we give explicit rational parametrizations of dense families of simple B(3)-representations in all dimensions < 12.
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