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arXiv 0903.2864math.RT
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对称群的无重数表示

Multiplicity-free representations of symmetric groups

Mark Wildon

摘要:

在Saxl工作的基础上,我们对所有度为66或更高的对称群的无重数置换特征标进行了分类。一个推论是对称群(也是66度或更高)的不可约特征标的完整列表,这些特征标可能出现在无重性的置换表示中。对单项式特征标族中的无重性特征标也进行了分类。最后,我们调查的结果,这些结果的Specht过滤置换模定义在领域的主要特征。备注:Godsil和Meagher的平行工作(arXiv:math/0612567)给出了所有度的对称群的无重性置换特征标的独立分类。

英文摘要:

Building on work of Saxl, we classify the multiplicity-free permutation characters of all symmetric groups of degree 66 or more. A corollary is a complete list of the irreducible characters of symmetric groups (again of degree 66 or more) which may appear in a multiplicity-free permutation representation. The multiplicity-free characters in a related family of monomial characters are also classified. We end by investigating a consequence of these results for Specht filtrations of permutation modules defined over fields of prime characteristic. Remark: parallel work of Godsil and Meagher (arXiv:math/0612567) gives an independent classification of the multiplicity-free permutation characters of symmetric groups of all degrees.

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