The symmetry of intersection numbers in group theory
Geometric Topology
2014-11-11 v2 Group Theory
Abstract
For suitable subgroups of a finitely generated group, we define the intersection number of one subgroup with another subgroup and show that this number is symmetric. We also give an interpretation of this number.
Cite
@article{arxiv.math/9712212,
title = {The symmetry of intersection numbers in group theory},
author = {Peter Scott},
journal= {arXiv preprint arXiv:math/9712212},
year = {2014}
}
Comments
19 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol2/paper2.abs.html . Includes erratum added to the original, published 19 Mar 1998