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arXiv math/0010323math.GRmath.AT
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辫群的Zebriki定理和图

Zariski theorems and diagrams for braid groups

David Bessis

摘要:

Orlik-Solomon和Broué-Malle-Rouquier使用Shephard-Todd分类法观察了复反射群及其辫群的生成系统的经验性质。给出了辫群表示的一般存在性结果,部分解释和推广了已知的经验性质。我们的方法是不变的理论,不使用分类。这两个成分是斯普林格理论的正规元素和Zurkiki定理。

英文摘要:

Empirical properties of generating systems for complex reflection groups and their braid groups have been observed by Orlik-Solomon and Broué-Malle-Rouquier, using Shephard-Todd classification. We give a general existence result for presentations of braid groups, which partially explains and generalizes the known empirical properties. Our approach is invariant-theoretic and does not use the classification. The two ingredients are Springer theory of regular elements and a Zariski-like theorem.

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