If G is a finitely generated profinite group then the verbal subgroup Gq is open. In a d-generator finite group every product of qth powers is a product of f(d,q) qth powers.
@article{10_4171_ggd_136,
author = {Nikolay Nikolov and Dan Segal},
title = {Powers in finite groups},
journal = {Groups, geometry, and dynamics},
pages = {501--507},
year = {2011},
volume = {5},
number = {2},
doi = {10.4171/ggd/136},
url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/136/}
}
TY - JOUR
AU - Nikolay Nikolov
AU - Dan Segal
TI - Powers in finite groups
JO - Groups, geometry, and dynamics
PY - 2011
SP - 501
EP - 507
VL - 5
IS - 2
UR - http://geodesic.mathdoc.fr/articles/10.4171/ggd/136/
DO - 10.4171/ggd/136
ID - 10_4171_ggd_136
ER -
%0 Journal Article
%A Nikolay Nikolov
%A Dan Segal
%T Powers in finite groups
%J Groups, geometry, and dynamics
%D 2011
%P 501-507
%V 5
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4171/ggd/136/
%R 10.4171/ggd/136
%F 10_4171_ggd_136