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arXiv:math/9712212 [math.GT]AbstractReferencesReviewsResources

The symmetry of intersection numbers in group theory

Peter Scott

Published 1997-12-02, updated 1998-09-07Version 2

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.

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
Journal: Geom. Topol. 2 (1998), 11-29
Categories: math.GT, math.GR
Subjects: 20F32, 20E06, 20E07, 20E08, 57M07
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