GL(n, q)-analogues of factorization problems in the symmetric group

Joel Brewster Lewis (1) , Alejandro H. Morales (2)

1 UMN-MATH - School of Mathematics
2 MATH - UC Davis - Department of Mathematics [Univ California Davis]

We consider GLn (Fq)-analogues of certain factorization problems in the symmetric group Sn: ratherthan counting factorizations of the long cycle(1,2, . . . , n) given the number of cycles of each factor, we countfactorizations 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.

Domaines: Combinatoire [math.CO]

Joel Brewster Lewis, Alejandro H. Morales. GL(n, q)-analogues of factorization problems in the symmetric group. 28-th International Conference on Formal Power Series and Algebraic Combinatorics, Simon Fraser University, Jul 2016, Vancouver, Canada. ⟨10.46298/dmtcs.6382⟩. ⟨hal-02168127⟩