Classification of the invariant subspaces of the Cohen-Wales representation of the Artin group of type $D_n$

Details Classification of the invariant subspaces of the Cohen-Wales representation of the Artin group of type $D_n$ Classification of the invariant subspaces of the Cohen-Wales representation of the Artin group of type $D_n$

2011-05-02

arxiv.org/abs/1105.0443v1

Mathematics

Representation Theory

20 pages, 1 table

Scientific paper

Recently, Cohen and Wales built a faithful linear representation of the Artin group of type $D_n$, hence showing the linearity of this group. It was later discovered that this representation is reducible for some complex values of its two parameters. It was also shown that when the representation is reducible, the action on a proper invariant subspace is a Hecke algebra action of type $D_n$. The goal of this paper is to classify these proper invariant subspaces in terms of Specht modules indexed by double partitions of the integer $n$. This work is the continuation of arXiv:1103.5673

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