Generating finite Coxeter groups with elements of the same order

Generating finite Coxeter groups with elements of the same order

Supposing G is a group and k a natural number, dk(G) is defined to be the minimal number of elements of G of order k which generate G (setting dk(G) = 0 if G has no such generating sets). This paper investigates dk(G) when G is a finite Coxeter group either of type Bn or Dn , or of exceptional type. Together with the work of Garzoni and Yu, this determines dk(G) for all finite irreducible Coxeter groups G when 2 ≤ k ≤ rank(G) (rank(G)+1 when G is of type An ).

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  • [1] Annin S, Maglione J. Economical generating sets for the symmetric and alternating groups consisting of cycles of a fixed length. Journal of Algebra and its Applications 2012; 11 (6): 8.
  • [2] Bosma W, Cannon J, Playoust C. The Magma algebra system. I. The user language. Journal of Symbolic Computation 1997; 24: 235-265.
  • [3] Garzoni D. Generating alternating and symmetric groups with two elements of fixed order. arXiv:1802.06213
  • [4] Humphreys JE. Reflection groups and Coxeter groups. Cambridge Studies in Advanced Mathematics, 29. Cambridge University Press, Cambridge, UK, 1990.
  • [5] Jones G. Primitive permutation groups containing a cycle. Bulletin of the Australian Mathematical Society 2014; 89 (1): 159-165.
  • [6] Jordan C. Traité des substitutions et des équations algébriques. Gauthier-Villars 1870 (in French).
  • [7] Lanier J. Generating mapping class groups with elements of fixed finite order. Journal of Algebra 2018; 511: 455-470.
  • [8] Miller GA. On the groups generated by two operators. Bulletin of the American Mathematical Society 1901; 7 (10): 424-426.
  • [9] Miller GA. Possible orders of two generators of the alternating and of the symmetric group. Transactions of the American Mathematical Society 1928; 30 (1): 24-32.
  • [10] Yu RWT. On the generation of Coxeter groups and their alternating subgroups by involutions. Journal of Group Theory 2019; 22: 1001-1013.