Now showing items 1-3 of 3

  • A description of auto-fixed subgroups in a free group 

    Martino, Armando; Ventura Capell, Enric (2004-06)
    Article
    Open Access
    Let F be a finitely generated free group. By using Bestvina-Handel theory, as well as some further improvements, the eigengroups of a given automorphism of F (and its fixed subgroup among them) are globally analyzed and ...
  • On automorphism-fixed subgroups of a free group 

    Martino, Armando; Ventura Capell, Enric (2000-08)
    Article
    Open Access
    Let F be a flnitely generated free group, and let n denote its rank. A subgroup H of F is said to be automorphism-flxed, or auto-flxed for short, if there exists a set S of automorphisms of F such that H is precisely the ...
  • On two distributions of subgroups of free groups 

    Bassino, Frédérique; Martino, Armando; Nicaud, Cyril; Ventura Capell, Enric; Weil, Pascal (Society for Industrial and Applied Mathematics, 2010)
    Conference report
    Restricted access - publisher's policy
    We study and compare two natural distributions of finitely generated subgroups of free groups. One is based on the random generation of tuples of reduced words; that is the one classically used by group theorists. The ...