Folding actions

 

作者: R. Lawther,  

 

期刊: Bulletin of the London Mathematical Society  (WILEY Available online 2016)
卷期: Volume 25, issue 2  

页码: 132-144

 

ISSN:0024-6093

 

年代: 2016

 

DOI:10.1112/blms/25.2.132

 

出版商: Oxford University Press

 

数据来源: WILEY

 

摘要:

In this paper we begin by examining the action ofE6(q) on the cosets of the subgroupF4(q): we give the rank and subdegrees, and show that it is multiplicity‐free, that is, the constituents of the permutation character are all distinct. It is found that the suborbits correspond to conjugacy classes ofA2(q); we seek to explain this using the concept of ‘folding actions’. This enables the related action of2E6(q2onF4(q) to be treated with little extra effort.

 

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