%0 Journal Article
%T On minimal finite quotients of outer automorphism groups of free groups
%A Mattia Mecchia
%A Bruno Zimmermann
%J Mathematics
%D 2009
%I arXiv
%X We prove that, for n=3 and 4, the minimal nonabelian finite factor group of the outer automorphism group Out F_n of a free group of rank n is the linear group PSL_n(Z_2) (conjecturally, this may remain true for arbitrary rank n > 2). We also discuss some computational results on low index subgroups of Aut F_n and Out F_n, for n = 3 and 4, using presentations of these groups.
%U http://arxiv.org/abs/0912.3645v2