Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9493572 | Journal of Algebra | 2005 | 29 Pages |
Abstract
Let X be a graph, with the corresponding simply-laced Coxeter group W. Then W acts naturally on the lattice L spanned by the vertices of X, preserving a quadratic form. We give conditions on X for the form to be nonsingular modulo two, and study the images of WâO(L/2kL).
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Mark Reeder,