An elementary proof that subgroups of free groups are free
Group Theory
2010-06-22 v1
Abstract
We provide an elementary proof that subgroups of free groups are free via group actions.
Cite
@article{arxiv.1006.3833,
title = {An elementary proof that subgroups of free groups are free},
author = {Benjamin Steinberg},
journal= {arXiv preprint arXiv:1006.3833},
year = {2010}
}