Proceedings of the 28-th International Conference on Formal Power Series and Algebraic Combinatorics
4-8 Jul 2016 Vancouver, British Columbia (Canada)
GL(n, q)-analogues of factorization problems in the symmetric group
Joel Brewster Lewis  1  , Alejandro H. Morales  2  
1 : School of Mathematics  (UMN-MATH)  -  Website
University of Minnesota 127 Vincent Hall 206 Church Street Minneapolis MN 55455 -  États-Unis
2 : Department of Mathematics - University of California  -  Website
Department of Mathematics, University of California, Davis, CA 95616-8633, USA -  États-Unis

We consider GLn(Fq) analogues of certain factorization problems in the symmetric group Sn: rather than counting factorizations of the long cycle (1,2,...,n) given the number of cycles of each factor, we count factorizations of a regular elliptic element given the fixed space dimension of each factor. We show that, as in Sn, the generating function counting these factorizations has attractive coefficients after an appropriate change of basis. Our work generalizes several recent results on factorizations in GLn(Fq) and also uses a character-based approach. We end with an asymptotic application and some questions. 

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